Add support for builtin float comparison operations (#3899)

Adds support for builtin comparison operations for floats (`==`, `!=`,
`<`, `<=`, `>`, `>=`).

toolchain/check/eval.cpp

@@ -650,6 +650,43 @@ static auto PerformBuiltinBinaryFloatOp(Context& context,
   return MakeFloatResult(context, lhs.type_id, std::move(result_val));
 }
 
+// Performs a builtin float comparison.
+static auto PerformBuiltinFloatComparison(
+    Context& context, SemIR::BuiltinFunctionKind builtin_kind,
+    SemIR::InstId lhs_id, SemIR::InstId rhs_id, SemIR::TypeId bool_type_id)
+    -> SemIR::ConstantId {
+  auto lhs = context.insts().GetAs<SemIR::FloatLiteral>(lhs_id);
+  auto rhs = context.insts().GetAs<SemIR::FloatLiteral>(rhs_id);
+  const auto& lhs_val = context.floats().Get(lhs.float_id);
+  const auto& rhs_val = context.floats().Get(rhs.float_id);
+
+  bool result;
+  switch (builtin_kind) {
+    case SemIR::BuiltinFunctionKind::FloatEq:
+      result = (lhs_val == rhs_val);
+      break;
+    case SemIR::BuiltinFunctionKind::FloatNeq:
+      result = (lhs_val != rhs_val);
+      break;
+    case SemIR::BuiltinFunctionKind::FloatLess:
+      result = lhs_val < rhs_val;
+      break;
+    case SemIR::BuiltinFunctionKind::FloatLessEq:
+      result = lhs_val <= rhs_val;
+      break;
+    case SemIR::BuiltinFunctionKind::FloatGreater:
+      result = lhs_val > rhs_val;
+      break;
+    case SemIR::BuiltinFunctionKind::FloatGreaterEq:
+      result = lhs_val >= rhs_val;
+      break;
+    default:
+      CARBON_FATAL() << "Unexpected operation kind.";
+  }
+
+  return MakeBoolResult(context, bool_type_id, result);
+}
+
 static auto PerformBuiltinCall(Context& context, SemIRLoc loc, SemIR::Call call,
                                SemIR::BuiltinFunctionKind builtin_kind,
                                llvm::ArrayRef<SemIR::InstId> arg_ids,
@@ -754,6 +791,20 @@ static auto PerformBuiltinCall(Context& context, SemIRLoc loc, SemIR::Call call,
       return PerformBuiltinBinaryFloatOp(context, builtin_kind, arg_ids[0],
                                          arg_ids[1]);
     }
+
+    // Float comparisons.
+    case SemIR::BuiltinFunctionKind::FloatEq:
+    case SemIR::BuiltinFunctionKind::FloatNeq:
+    case SemIR::BuiltinFunctionKind::FloatLess:
+    case SemIR::BuiltinFunctionKind::FloatLessEq:
+    case SemIR::BuiltinFunctionKind::FloatGreater:
+    case SemIR::BuiltinFunctionKind::FloatGreaterEq: {
+      if (phase != Phase::Template) {
+        break;
+      }
+      return PerformBuiltinFloatComparison(context, builtin_kind, arg_ids[0],
+                                           arg_ids[1], call.type_id);
+    }
   }
 
   return SemIR::ConstantId::NotConstant;

toolchain/check/testdata/builtins/float/eq.carbon

@@ -0,0 +1,168 @@
+// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
+// Exceptions. See /LICENSE for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+// AUTOUPDATE
+
+// --- float_eq.carbon
+
+fn Eq(a: f64, b: f64) -> bool = "float.eq";
+
+class True {}
+class False {}
+
+fn F(true_: True, false_: False) {
+  true_ as (if Eq(1.0, 1.0) then True else False);
+  false_ as (if Eq(1.0, 2.0) then True else False);
+}
+
+fn RuntimeCall(a: f64, b: f64) -> bool {
+  return Eq(a, b);
+}
+
+// --- fail_bad_decl.carbon
+
+package FailBadDecl api;
+
+// CHECK:STDERR: fail_bad_decl.carbon:[[@LINE+3]]:1: ERROR: Invalid signature for builtin function "float.eq".
+// CHECK:STDERR: fn WrongResult(a: f64, b: f64) -> f64 = "float.eq";
+// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+fn WrongResult(a: f64, b: f64) -> f64 = "float.eq";
+
+// CHECK:STDOUT: --- float_eq.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %True: type = class_type @True [template]
+// CHECK:STDOUT:   %.1: type = struct_type {} [template]
+// CHECK:STDOUT:   %False: type = class_type @False [template]
+// CHECK:STDOUT:   %.2: type = tuple_type () [template]
+// CHECK:STDOUT:   %.3: type = ptr_type {} [template]
+// CHECK:STDOUT:   %.4: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.5: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.6: bool = bool_literal true [template]
+// CHECK:STDOUT:   %.7: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.8: f64 = float_literal 2 [template]
+// CHECK:STDOUT:   %.9: bool = bool_literal false [template]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [template] {
+// CHECK:STDOUT:     .Core = %Core
+// CHECK:STDOUT:     .Eq = %Eq
+// CHECK:STDOUT:     .True = %True.decl
+// CHECK:STDOUT:     .False = %False.decl
+// CHECK:STDOUT:     .F = %F
+// CHECK:STDOUT:     .RuntimeCall = %RuntimeCall
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core: <namespace> = namespace [template] {}
+// CHECK:STDOUT:   %Eq: <function> = fn_decl @Eq [template] {
+// CHECK:STDOUT:     %a.loc2_7.1: f64 = param a
+// CHECK:STDOUT:     @Eq.%a: f64 = bind_name a, %a.loc2_7.1
+// CHECK:STDOUT:     %b.loc2_15.1: f64 = param b
+// CHECK:STDOUT:     @Eq.%b: f64 = bind_name b, %b.loc2_15.1
+// CHECK:STDOUT:     @Eq.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %True.decl: type = class_decl @True [template = constants.%True] {}
+// CHECK:STDOUT:   %False.decl: type = class_decl @False [template = constants.%False] {}
+// CHECK:STDOUT:   %F: <function> = fn_decl @F [template] {
+// CHECK:STDOUT:     %True.ref: type = name_ref True, %True.decl [template = constants.%True]
+// CHECK:STDOUT:     %true_.loc7_6.1: True = param true_
+// CHECK:STDOUT:     @F.%true_: True = bind_name true_, %true_.loc7_6.1
+// CHECK:STDOUT:     %False.ref: type = name_ref False, %False.decl [template = constants.%False]
+// CHECK:STDOUT:     %false_.loc7_19.1: False = param false_
+// CHECK:STDOUT:     @F.%false_: False = bind_name false_, %false_.loc7_19.1
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %RuntimeCall: <function> = fn_decl @RuntimeCall [template] {
+// CHECK:STDOUT:     %a.loc12_16.1: f64 = param a
+// CHECK:STDOUT:     @RuntimeCall.%a: f64 = bind_name a, %a.loc12_16.1
+// CHECK:STDOUT:     %b.loc12_24.1: f64 = param b
+// CHECK:STDOUT:     @RuntimeCall.%b: f64 = bind_name b, %b.loc12_24.1
+// CHECK:STDOUT:     @RuntimeCall.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @True {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%True
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @False {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%False
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @Eq(%a: f64, %b: f64) -> bool = "float.eq";
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F(%true_: True, %false_: False) {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %true_.ref: True = name_ref true_, %true_
+// CHECK:STDOUT:   %Eq.ref.loc8: <function> = name_ref Eq, file.%Eq [template = file.%Eq]
+// CHECK:STDOUT:   %.loc8_19: f64 = float_literal 1 [template = constants.%.4]
+// CHECK:STDOUT:   %.loc8_24: f64 = float_literal 1 [template = constants.%.5]
+// CHECK:STDOUT:   %float.eq.loc8: init bool = call %Eq.ref.loc8(%.loc8_19, %.loc8_24) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc8_13.1: bool = value_of_initializer %float.eq.loc8 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc8_13.2: bool = converted %float.eq.loc8, %.loc8_13.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc8_13.2 br !if.expr.then.loc8 else br !if.expr.else.loc8
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc8:
+// CHECK:STDOUT:   %True.ref.loc8: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc8(%True.ref.loc8)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc8:
+// CHECK:STDOUT:   %False.ref.loc8: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc8(%False.ref.loc8)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc8:
+// CHECK:STDOUT:   %.loc8_13.3: type = block_arg !if.expr.result.loc8 [template = constants.%True]
+// CHECK:STDOUT:   %false_.ref: False = name_ref false_, %false_
+// CHECK:STDOUT:   %Eq.ref.loc9: <function> = name_ref Eq, file.%Eq [template = file.%Eq]
+// CHECK:STDOUT:   %.loc9_20: f64 = float_literal 1 [template = constants.%.7]
+// CHECK:STDOUT:   %.loc9_25: f64 = float_literal 2 [template = constants.%.8]
+// CHECK:STDOUT:   %float.eq.loc9: init bool = call %Eq.ref.loc9(%.loc9_20, %.loc9_25) [template = constants.%.9]
+// CHECK:STDOUT:   %.loc9_14.1: bool = value_of_initializer %float.eq.loc9 [template = constants.%.9]
+// CHECK:STDOUT:   %.loc9_14.2: bool = converted %float.eq.loc9, %.loc9_14.1 [template = constants.%.9]
+// CHECK:STDOUT:   if %.loc9_14.2 br !if.expr.then.loc9 else br !if.expr.else.loc9
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc9:
+// CHECK:STDOUT:   %True.ref.loc9: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%True.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc9:
+// CHECK:STDOUT:   %False.ref.loc9: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%False.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc9:
+// CHECK:STDOUT:   %.loc9_14.3: type = block_arg !if.expr.result.loc9 [template = constants.%False]
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @RuntimeCall(%a: f64, %b: f64) -> bool {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Eq.ref: <function> = name_ref Eq, file.%Eq [template = file.%Eq]
+// CHECK:STDOUT:   %a.ref: f64 = name_ref a, %a
+// CHECK:STDOUT:   %b.ref: f64 = name_ref b, %b
+// CHECK:STDOUT:   %float.eq: init bool = call %Eq.ref(%a.ref, %b.ref)
+// CHECK:STDOUT:   %.loc13_18.1: bool = value_of_initializer %float.eq
+// CHECK:STDOUT:   %.loc13_18.2: bool = converted %float.eq, %.loc13_18.1
+// CHECK:STDOUT:   return %.loc13_18.2
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- fail_bad_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [template] {
+// CHECK:STDOUT:     .Core = %Core
+// CHECK:STDOUT:     .WrongResult = %WrongResult
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core: <namespace> = namespace [template] {}
+// CHECK:STDOUT:   %WrongResult: <function> = fn_decl @WrongResult [template] {
+// CHECK:STDOUT:     %a.loc7_16.1: f64 = param a
+// CHECK:STDOUT:     @WrongResult.%a: f64 = bind_name a, %a.loc7_16.1
+// CHECK:STDOUT:     %b.loc7_24.1: f64 = param b
+// CHECK:STDOUT:     @WrongResult.%b: f64 = bind_name b, %b.loc7_24.1
+// CHECK:STDOUT:     @WrongResult.%return: ref f64 = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @WrongResult(%a: f64, %b: f64) -> f64;
+// CHECK:STDOUT:

toolchain/check/testdata/builtins/float/greater.carbon

@@ -0,0 +1,225 @@
+// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
+// Exceptions. See /LICENSE for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+// AUTOUPDATE
+
+// --- float_greater.carbon
+
+fn Greater(a: f64, b: f64) -> bool = "float.greater";
+fn Negate(a: f64) -> f64 = "float.negate";
+
+class True {}
+class False {}
+
+fn F(true_: True, false_: False) {
+  false_ as (if Greater(1.0, 2.0) then True else False);
+  false_ as (if Greater(1.0, 1.0) then True else False);
+  true_ as (if Greater(1.0, 0.0) then True else False);
+  false_ as (if Greater(Negate(1.0), 0.0) then True else False);
+  true_ as (if Greater(0.0, Negate(1.0)) then True else False);
+}
+
+fn RuntimeCall(a: f64, b: f64) -> bool {
+  return Greater(a, b);
+}
+
+// CHECK:STDOUT: --- float_greater.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %True: type = class_type @True [template]
+// CHECK:STDOUT:   %.1: type = struct_type {} [template]
+// CHECK:STDOUT:   %False: type = class_type @False [template]
+// CHECK:STDOUT:   %.2: type = tuple_type () [template]
+// CHECK:STDOUT:   %.3: type = ptr_type {} [template]
+// CHECK:STDOUT:   %.4: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.5: f64 = float_literal 2 [template]
+// CHECK:STDOUT:   %.6: bool = bool_literal false [template]
+// CHECK:STDOUT:   %.7: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.8: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.9: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.10: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.11: bool = bool_literal true [template]
+// CHECK:STDOUT:   %.12: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.13: f64 = float_literal -1 [template]
+// CHECK:STDOUT:   %.14: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.15: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.16: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.17: f64 = float_literal -1 [template]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [template] {
+// CHECK:STDOUT:     .Core = %Core
+// CHECK:STDOUT:     .Greater = %Greater
+// CHECK:STDOUT:     .Negate = %Negate
+// CHECK:STDOUT:     .True = %True.decl
+// CHECK:STDOUT:     .False = %False.decl
+// CHECK:STDOUT:     .F = %F
+// CHECK:STDOUT:     .RuntimeCall = %RuntimeCall
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core: <namespace> = namespace [template] {}
+// CHECK:STDOUT:   %Greater: <function> = fn_decl @Greater [template] {
+// CHECK:STDOUT:     %a.loc2_12.1: f64 = param a
+// CHECK:STDOUT:     @Greater.%a: f64 = bind_name a, %a.loc2_12.1
+// CHECK:STDOUT:     %b.loc2_20.1: f64 = param b
+// CHECK:STDOUT:     @Greater.%b: f64 = bind_name b, %b.loc2_20.1
+// CHECK:STDOUT:     @Greater.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Negate: <function> = fn_decl @Negate [template] {
+// CHECK:STDOUT:     %a.loc3_11.1: f64 = param a
+// CHECK:STDOUT:     @Negate.%a: f64 = bind_name a, %a.loc3_11.1
+// CHECK:STDOUT:     @Negate.%return: ref f64 = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %True.decl: type = class_decl @True [template = constants.%True] {}
+// CHECK:STDOUT:   %False.decl: type = class_decl @False [template = constants.%False] {}
+// CHECK:STDOUT:   %F: <function> = fn_decl @F [template] {
+// CHECK:STDOUT:     %True.ref: type = name_ref True, %True.decl [template = constants.%True]
+// CHECK:STDOUT:     %true_.loc8_6.1: True = param true_
+// CHECK:STDOUT:     @F.%true_: True = bind_name true_, %true_.loc8_6.1
+// CHECK:STDOUT:     %False.ref: type = name_ref False, %False.decl [template = constants.%False]
+// CHECK:STDOUT:     %false_.loc8_19.1: False = param false_
+// CHECK:STDOUT:     @F.%false_: False = bind_name false_, %false_.loc8_19.1
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %RuntimeCall: <function> = fn_decl @RuntimeCall [template] {
+// CHECK:STDOUT:     %a.loc16_16.1: f64 = param a
+// CHECK:STDOUT:     @RuntimeCall.%a: f64 = bind_name a, %a.loc16_16.1
+// CHECK:STDOUT:     %b.loc16_24.1: f64 = param b
+// CHECK:STDOUT:     @RuntimeCall.%b: f64 = bind_name b, %b.loc16_24.1
+// CHECK:STDOUT:     @RuntimeCall.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @True {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%True
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @False {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%False
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @Greater(%a: f64, %b: f64) -> bool = "float.greater";
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @Negate(%a: f64) -> f64 = "float.negate";
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F(%true_: True, %false_: False) {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %false_.ref.loc9: False = name_ref false_, %false_
+// CHECK:STDOUT:   %Greater.ref.loc9: <function> = name_ref Greater, file.%Greater [template = file.%Greater]
+// CHECK:STDOUT:   %.loc9_25: f64 = float_literal 1 [template = constants.%.4]
+// CHECK:STDOUT:   %.loc9_30: f64 = float_literal 2 [template = constants.%.5]
+// CHECK:STDOUT:   %float.greater.loc9: init bool = call %Greater.ref.loc9(%.loc9_25, %.loc9_30) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc9_14.1: bool = value_of_initializer %float.greater.loc9 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc9_14.2: bool = converted %float.greater.loc9, %.loc9_14.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc9_14.2 br !if.expr.then.loc9 else br !if.expr.else.loc9
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc9:
+// CHECK:STDOUT:   %True.ref.loc9: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%True.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc9:
+// CHECK:STDOUT:   %False.ref.loc9: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%False.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc9:
+// CHECK:STDOUT:   %.loc9_14.3: type = block_arg !if.expr.result.loc9 [template = constants.%False]
+// CHECK:STDOUT:   %false_.ref.loc10: False = name_ref false_, %false_
+// CHECK:STDOUT:   %Greater.ref.loc10: <function> = name_ref Greater, file.%Greater [template = file.%Greater]
+// CHECK:STDOUT:   %.loc10_25: f64 = float_literal 1 [template = constants.%.7]
+// CHECK:STDOUT:   %.loc10_30: f64 = float_literal 1 [template = constants.%.8]
+// CHECK:STDOUT:   %float.greater.loc10: init bool = call %Greater.ref.loc10(%.loc10_25, %.loc10_30) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc10_14.1: bool = value_of_initializer %float.greater.loc10 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc10_14.2: bool = converted %float.greater.loc10, %.loc10_14.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc10_14.2 br !if.expr.then.loc10 else br !if.expr.else.loc10
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc10:
+// CHECK:STDOUT:   %True.ref.loc10: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc10(%True.ref.loc10)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc10:
+// CHECK:STDOUT:   %False.ref.loc10: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc10(%False.ref.loc10)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc10:
+// CHECK:STDOUT:   %.loc10_14.3: type = block_arg !if.expr.result.loc10 [template = constants.%False]
+// CHECK:STDOUT:   %true_.ref.loc11: True = name_ref true_, %true_
+// CHECK:STDOUT:   %Greater.ref.loc11: <function> = name_ref Greater, file.%Greater [template = file.%Greater]
+// CHECK:STDOUT:   %.loc11_24: f64 = float_literal 1 [template = constants.%.9]
+// CHECK:STDOUT:   %.loc11_29: f64 = float_literal 0 [template = constants.%.10]
+// CHECK:STDOUT:   %float.greater.loc11: init bool = call %Greater.ref.loc11(%.loc11_24, %.loc11_29) [template = constants.%.11]
+// CHECK:STDOUT:   %.loc11_13.1: bool = value_of_initializer %float.greater.loc11 [template = constants.%.11]
+// CHECK:STDOUT:   %.loc11_13.2: bool = converted %float.greater.loc11, %.loc11_13.1 [template = constants.%.11]
+// CHECK:STDOUT:   if %.loc11_13.2 br !if.expr.then.loc11 else br !if.expr.else.loc11
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc11:
+// CHECK:STDOUT:   %True.ref.loc11: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc11(%True.ref.loc11)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc11:
+// CHECK:STDOUT:   %False.ref.loc11: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc11(%False.ref.loc11)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc11:
+// CHECK:STDOUT:   %.loc11_13.3: type = block_arg !if.expr.result.loc11 [template = constants.%True]
+// CHECK:STDOUT:   %false_.ref.loc12: False = name_ref false_, %false_
+// CHECK:STDOUT:   %Greater.ref.loc12: <function> = name_ref Greater, file.%Greater [template = file.%Greater]
+// CHECK:STDOUT:   %Negate.ref.loc12: <function> = name_ref Negate, file.%Negate [template = file.%Negate]
+// CHECK:STDOUT:   %.loc12_32: f64 = float_literal 1 [template = constants.%.12]
+// CHECK:STDOUT:   %float.negate.loc12: init f64 = call %Negate.ref.loc12(%.loc12_32) [template = constants.%.13]
+// CHECK:STDOUT:   %.loc12_38: f64 = float_literal 0 [template = constants.%.14]
+// CHECK:STDOUT:   %.loc12_24.1: f64 = value_of_initializer %float.negate.loc12 [template = constants.%.13]
+// CHECK:STDOUT:   %.loc12_24.2: f64 = converted %float.negate.loc12, %.loc12_24.1 [template = constants.%.13]
+// CHECK:STDOUT:   %float.greater.loc12: init bool = call %Greater.ref.loc12(%.loc12_24.2, %.loc12_38) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc12_14.1: bool = value_of_initializer %float.greater.loc12 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc12_14.2: bool = converted %float.greater.loc12, %.loc12_14.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc12_14.2 br !if.expr.then.loc12 else br !if.expr.else.loc12
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc12:
+// CHECK:STDOUT:   %True.ref.loc12: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc12(%True.ref.loc12)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc12:
+// CHECK:STDOUT:   %False.ref.loc12: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc12(%False.ref.loc12)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc12:
+// CHECK:STDOUT:   %.loc12_14.3: type = block_arg !if.expr.result.loc12 [template = constants.%False]
+// CHECK:STDOUT:   %true_.ref.loc13: True = name_ref true_, %true_
+// CHECK:STDOUT:   %Greater.ref.loc13: <function> = name_ref Greater, file.%Greater [template = file.%Greater]
+// CHECK:STDOUT:   %.loc13_24: f64 = float_literal 0 [template = constants.%.15]
+// CHECK:STDOUT:   %Negate.ref.loc13: <function> = name_ref Negate, file.%Negate [template = file.%Negate]
+// CHECK:STDOUT:   %.loc13_36: f64 = float_literal 1 [template = constants.%.16]
+// CHECK:STDOUT:   %float.negate.loc13: init f64 = call %Negate.ref.loc13(%.loc13_36) [template = constants.%.17]
+// CHECK:STDOUT:   %.loc13_23.1: f64 = value_of_initializer %float.negate.loc13 [template = constants.%.17]
+// CHECK:STDOUT:   %.loc13_23.2: f64 = converted %float.negate.loc13, %.loc13_23.1 [template = constants.%.17]
+// CHECK:STDOUT:   %float.greater.loc13: init bool = call %Greater.ref.loc13(%.loc13_24, %.loc13_23.2) [template = constants.%.11]
+// CHECK:STDOUT:   %.loc13_13.1: bool = value_of_initializer %float.greater.loc13 [template = constants.%.11]
+// CHECK:STDOUT:   %.loc13_13.2: bool = converted %float.greater.loc13, %.loc13_13.1 [template = constants.%.11]
+// CHECK:STDOUT:   if %.loc13_13.2 br !if.expr.then.loc13 else br !if.expr.else.loc13
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc13:
+// CHECK:STDOUT:   %True.ref.loc13: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc13(%True.ref.loc13)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc13:
+// CHECK:STDOUT:   %False.ref.loc13: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc13(%False.ref.loc13)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc13:
+// CHECK:STDOUT:   %.loc13_13.3: type = block_arg !if.expr.result.loc13 [template = constants.%True]
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @RuntimeCall(%a: f64, %b: f64) -> bool {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Greater.ref: <function> = name_ref Greater, file.%Greater [template = file.%Greater]
+// CHECK:STDOUT:   %a.ref: f64 = name_ref a, %a
+// CHECK:STDOUT:   %b.ref: f64 = name_ref b, %b
+// CHECK:STDOUT:   %float.greater: init bool = call %Greater.ref(%a.ref, %b.ref)
+// CHECK:STDOUT:   %.loc17_23.1: bool = value_of_initializer %float.greater
+// CHECK:STDOUT:   %.loc17_23.2: bool = converted %float.greater, %.loc17_23.1
+// CHECK:STDOUT:   return %.loc17_23.2
+// CHECK:STDOUT: }
+// CHECK:STDOUT:

toolchain/check/testdata/builtins/float/greater_eq.carbon

@@ -0,0 +1,225 @@
+// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
+// Exceptions. See /LICENSE for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+// AUTOUPDATE
+
+// --- float_greater_eq.carbon
+
+fn GreaterEq(a: f64, b: f64) -> bool = "float.greater_eq";
+fn Negate(a: f64) -> f64 = "float.negate";
+
+class True {}
+class False {}
+
+fn F(true_: True, false_: False) {
+  false_ as (if GreaterEq(1.0, 2.0) then True else False);
+  true_ as (if GreaterEq(1.0, 1.0) then True else False);
+  true_ as (if GreaterEq(1.0, 0.0) then True else False);
+  false_ as (if GreaterEq(Negate(1.0), 0.0) then True else False);
+  true_ as (if GreaterEq(0.0, Negate(1.0)) then True else False);
+}
+
+fn RuntimeCall(a: f64, b: f64) -> bool {
+  return GreaterEq(a, b);
+}
+
+// CHECK:STDOUT: --- float_greater_eq.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %True: type = class_type @True [template]
+// CHECK:STDOUT:   %.1: type = struct_type {} [template]
+// CHECK:STDOUT:   %False: type = class_type @False [template]
+// CHECK:STDOUT:   %.2: type = tuple_type () [template]
+// CHECK:STDOUT:   %.3: type = ptr_type {} [template]
+// CHECK:STDOUT:   %.4: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.5: f64 = float_literal 2 [template]
+// CHECK:STDOUT:   %.6: bool = bool_literal false [template]
+// CHECK:STDOUT:   %.7: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.8: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.9: bool = bool_literal true [template]
+// CHECK:STDOUT:   %.10: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.11: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.12: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.13: f64 = float_literal -1 [template]
+// CHECK:STDOUT:   %.14: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.15: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.16: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.17: f64 = float_literal -1 [template]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [template] {
+// CHECK:STDOUT:     .Core = %Core
+// CHECK:STDOUT:     .GreaterEq = %GreaterEq
+// CHECK:STDOUT:     .Negate = %Negate
+// CHECK:STDOUT:     .True = %True.decl
+// CHECK:STDOUT:     .False = %False.decl
+// CHECK:STDOUT:     .F = %F
+// CHECK:STDOUT:     .RuntimeCall = %RuntimeCall
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core: <namespace> = namespace [template] {}
+// CHECK:STDOUT:   %GreaterEq: <function> = fn_decl @GreaterEq [template] {
+// CHECK:STDOUT:     %a.loc2_14.1: f64 = param a
+// CHECK:STDOUT:     @GreaterEq.%a: f64 = bind_name a, %a.loc2_14.1
+// CHECK:STDOUT:     %b.loc2_22.1: f64 = param b
+// CHECK:STDOUT:     @GreaterEq.%b: f64 = bind_name b, %b.loc2_22.1
+// CHECK:STDOUT:     @GreaterEq.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Negate: <function> = fn_decl @Negate [template] {
+// CHECK:STDOUT:     %a.loc3_11.1: f64 = param a
+// CHECK:STDOUT:     @Negate.%a: f64 = bind_name a, %a.loc3_11.1
+// CHECK:STDOUT:     @Negate.%return: ref f64 = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %True.decl: type = class_decl @True [template = constants.%True] {}
+// CHECK:STDOUT:   %False.decl: type = class_decl @False [template = constants.%False] {}
+// CHECK:STDOUT:   %F: <function> = fn_decl @F [template] {
+// CHECK:STDOUT:     %True.ref: type = name_ref True, %True.decl [template = constants.%True]
+// CHECK:STDOUT:     %true_.loc8_6.1: True = param true_
+// CHECK:STDOUT:     @F.%true_: True = bind_name true_, %true_.loc8_6.1
+// CHECK:STDOUT:     %False.ref: type = name_ref False, %False.decl [template = constants.%False]
+// CHECK:STDOUT:     %false_.loc8_19.1: False = param false_
+// CHECK:STDOUT:     @F.%false_: False = bind_name false_, %false_.loc8_19.1
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %RuntimeCall: <function> = fn_decl @RuntimeCall [template] {
+// CHECK:STDOUT:     %a.loc16_16.1: f64 = param a
+// CHECK:STDOUT:     @RuntimeCall.%a: f64 = bind_name a, %a.loc16_16.1
+// CHECK:STDOUT:     %b.loc16_24.1: f64 = param b
+// CHECK:STDOUT:     @RuntimeCall.%b: f64 = bind_name b, %b.loc16_24.1
+// CHECK:STDOUT:     @RuntimeCall.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @True {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%True
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @False {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%False
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @GreaterEq(%a: f64, %b: f64) -> bool = "float.greater_eq";
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @Negate(%a: f64) -> f64 = "float.negate";
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F(%true_: True, %false_: False) {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %false_.ref.loc9: False = name_ref false_, %false_
+// CHECK:STDOUT:   %GreaterEq.ref.loc9: <function> = name_ref GreaterEq, file.%GreaterEq [template = file.%GreaterEq]
+// CHECK:STDOUT:   %.loc9_27: f64 = float_literal 1 [template = constants.%.4]
+// CHECK:STDOUT:   %.loc9_32: f64 = float_literal 2 [template = constants.%.5]
+// CHECK:STDOUT:   %float.greater_eq.loc9: init bool = call %GreaterEq.ref.loc9(%.loc9_27, %.loc9_32) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc9_14.1: bool = value_of_initializer %float.greater_eq.loc9 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc9_14.2: bool = converted %float.greater_eq.loc9, %.loc9_14.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc9_14.2 br !if.expr.then.loc9 else br !if.expr.else.loc9
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc9:
+// CHECK:STDOUT:   %True.ref.loc9: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%True.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc9:
+// CHECK:STDOUT:   %False.ref.loc9: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%False.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc9:
+// CHECK:STDOUT:   %.loc9_14.3: type = block_arg !if.expr.result.loc9 [template = constants.%False]
+// CHECK:STDOUT:   %true_.ref.loc10: True = name_ref true_, %true_
+// CHECK:STDOUT:   %GreaterEq.ref.loc10: <function> = name_ref GreaterEq, file.%GreaterEq [template = file.%GreaterEq]
+// CHECK:STDOUT:   %.loc10_26: f64 = float_literal 1 [template = constants.%.7]
+// CHECK:STDOUT:   %.loc10_31: f64 = float_literal 1 [template = constants.%.8]
+// CHECK:STDOUT:   %float.greater_eq.loc10: init bool = call %GreaterEq.ref.loc10(%.loc10_26, %.loc10_31) [template = constants.%.9]
+// CHECK:STDOUT:   %.loc10_13.1: bool = value_of_initializer %float.greater_eq.loc10 [template = constants.%.9]
+// CHECK:STDOUT:   %.loc10_13.2: bool = converted %float.greater_eq.loc10, %.loc10_13.1 [template = constants.%.9]
+// CHECK:STDOUT:   if %.loc10_13.2 br !if.expr.then.loc10 else br !if.expr.else.loc10
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc10:
+// CHECK:STDOUT:   %True.ref.loc10: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc10(%True.ref.loc10)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc10:
+// CHECK:STDOUT:   %False.ref.loc10: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc10(%False.ref.loc10)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc10:
+// CHECK:STDOUT:   %.loc10_13.3: type = block_arg !if.expr.result.loc10 [template = constants.%True]
+// CHECK:STDOUT:   %true_.ref.loc11: True = name_ref true_, %true_
+// CHECK:STDOUT:   %GreaterEq.ref.loc11: <function> = name_ref GreaterEq, file.%GreaterEq [template = file.%GreaterEq]
+// CHECK:STDOUT:   %.loc11_26: f64 = float_literal 1 [template = constants.%.10]
+// CHECK:STDOUT:   %.loc11_31: f64 = float_literal 0 [template = constants.%.11]
+// CHECK:STDOUT:   %float.greater_eq.loc11: init bool = call %GreaterEq.ref.loc11(%.loc11_26, %.loc11_31) [template = constants.%.9]
+// CHECK:STDOUT:   %.loc11_13.1: bool = value_of_initializer %float.greater_eq.loc11 [template = constants.%.9]
+// CHECK:STDOUT:   %.loc11_13.2: bool = converted %float.greater_eq.loc11, %.loc11_13.1 [template = constants.%.9]
+// CHECK:STDOUT:   if %.loc11_13.2 br !if.expr.then.loc11 else br !if.expr.else.loc11
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc11:
+// CHECK:STDOUT:   %True.ref.loc11: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc11(%True.ref.loc11)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc11:
+// CHECK:STDOUT:   %False.ref.loc11: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc11(%False.ref.loc11)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc11:
+// CHECK:STDOUT:   %.loc11_13.3: type = block_arg !if.expr.result.loc11 [template = constants.%True]
+// CHECK:STDOUT:   %false_.ref.loc12: False = name_ref false_, %false_
+// CHECK:STDOUT:   %GreaterEq.ref.loc12: <function> = name_ref GreaterEq, file.%GreaterEq [template = file.%GreaterEq]
+// CHECK:STDOUT:   %Negate.ref.loc12: <function> = name_ref Negate, file.%Negate [template = file.%Negate]
+// CHECK:STDOUT:   %.loc12_34: f64 = float_literal 1 [template = constants.%.12]
+// CHECK:STDOUT:   %float.negate.loc12: init f64 = call %Negate.ref.loc12(%.loc12_34) [template = constants.%.13]
+// CHECK:STDOUT:   %.loc12_40: f64 = float_literal 0 [template = constants.%.14]
+// CHECK:STDOUT:   %.loc12_26.1: f64 = value_of_initializer %float.negate.loc12 [template = constants.%.13]
+// CHECK:STDOUT:   %.loc12_26.2: f64 = converted %float.negate.loc12, %.loc12_26.1 [template = constants.%.13]
+// CHECK:STDOUT:   %float.greater_eq.loc12: init bool = call %GreaterEq.ref.loc12(%.loc12_26.2, %.loc12_40) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc12_14.1: bool = value_of_initializer %float.greater_eq.loc12 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc12_14.2: bool = converted %float.greater_eq.loc12, %.loc12_14.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc12_14.2 br !if.expr.then.loc12 else br !if.expr.else.loc12
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc12:
+// CHECK:STDOUT:   %True.ref.loc12: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc12(%True.ref.loc12)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc12:
+// CHECK:STDOUT:   %False.ref.loc12: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc12(%False.ref.loc12)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc12:
+// CHECK:STDOUT:   %.loc12_14.3: type = block_arg !if.expr.result.loc12 [template = constants.%False]
+// CHECK:STDOUT:   %true_.ref.loc13: True = name_ref true_, %true_
+// CHECK:STDOUT:   %GreaterEq.ref.loc13: <function> = name_ref GreaterEq, file.%GreaterEq [template = file.%GreaterEq]
+// CHECK:STDOUT:   %.loc13_26: f64 = float_literal 0 [template = constants.%.15]
+// CHECK:STDOUT:   %Negate.ref.loc13: <function> = name_ref Negate, file.%Negate [template = file.%Negate]
+// CHECK:STDOUT:   %.loc13_38: f64 = float_literal 1 [template = constants.%.16]
+// CHECK:STDOUT:   %float.negate.loc13: init f64 = call %Negate.ref.loc13(%.loc13_38) [template = constants.%.17]
+// CHECK:STDOUT:   %.loc13_25.1: f64 = value_of_initializer %float.negate.loc13 [template = constants.%.17]
+// CHECK:STDOUT:   %.loc13_25.2: f64 = converted %float.negate.loc13, %.loc13_25.1 [template = constants.%.17]
+// CHECK:STDOUT:   %float.greater_eq.loc13: init bool = call %GreaterEq.ref.loc13(%.loc13_26, %.loc13_25.2) [template = constants.%.9]
+// CHECK:STDOUT:   %.loc13_13.1: bool = value_of_initializer %float.greater_eq.loc13 [template = constants.%.9]
+// CHECK:STDOUT:   %.loc13_13.2: bool = converted %float.greater_eq.loc13, %.loc13_13.1 [template = constants.%.9]
+// CHECK:STDOUT:   if %.loc13_13.2 br !if.expr.then.loc13 else br !if.expr.else.loc13
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc13:
+// CHECK:STDOUT:   %True.ref.loc13: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc13(%True.ref.loc13)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc13:
+// CHECK:STDOUT:   %False.ref.loc13: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc13(%False.ref.loc13)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc13:
+// CHECK:STDOUT:   %.loc13_13.3: type = block_arg !if.expr.result.loc13 [template = constants.%True]
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @RuntimeCall(%a: f64, %b: f64) -> bool {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %GreaterEq.ref: <function> = name_ref GreaterEq, file.%GreaterEq [template = file.%GreaterEq]
+// CHECK:STDOUT:   %a.ref: f64 = name_ref a, %a
+// CHECK:STDOUT:   %b.ref: f64 = name_ref b, %b
+// CHECK:STDOUT:   %float.greater_eq: init bool = call %GreaterEq.ref(%a.ref, %b.ref)
+// CHECK:STDOUT:   %.loc17_25.1: bool = value_of_initializer %float.greater_eq
+// CHECK:STDOUT:   %.loc17_25.2: bool = converted %float.greater_eq, %.loc17_25.1
+// CHECK:STDOUT:   return %.loc17_25.2
+// CHECK:STDOUT: }
+// CHECK:STDOUT:

toolchain/check/testdata/builtins/float/less.carbon

@@ -0,0 +1,225 @@
+// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
+// Exceptions. See /LICENSE for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+// AUTOUPDATE
+
+// --- float_less.carbon
+
+fn Less(a: f64, b: f64) -> bool = "float.less";
+fn Negate(a: f64) -> f64 = "float.negate";
+
+class True {}
+class False {}
+
+fn F(true_: True, false_: False) {
+  true_ as (if Less(1.0, 2.0) then True else False);
+  false_ as (if Less(1.0, 1.0) then True else False);
+  false_ as (if Less(1.0, 0.0) then True else False);
+  true_ as (if Less(Negate(1.0), 0.0) then True else False);
+  false_ as (if Less(0.0, Negate(1.0)) then True else False);
+}
+
+fn RuntimeCall(a: f64, b: f64) -> bool {
+  return Less(a, b);
+}
+
+// CHECK:STDOUT: --- float_less.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %True: type = class_type @True [template]
+// CHECK:STDOUT:   %.1: type = struct_type {} [template]
+// CHECK:STDOUT:   %False: type = class_type @False [template]
+// CHECK:STDOUT:   %.2: type = tuple_type () [template]
+// CHECK:STDOUT:   %.3: type = ptr_type {} [template]
+// CHECK:STDOUT:   %.4: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.5: f64 = float_literal 2 [template]
+// CHECK:STDOUT:   %.6: bool = bool_literal true [template]
+// CHECK:STDOUT:   %.7: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.8: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.9: bool = bool_literal false [template]
+// CHECK:STDOUT:   %.10: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.11: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.12: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.13: f64 = float_literal -1 [template]
+// CHECK:STDOUT:   %.14: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.15: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.16: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.17: f64 = float_literal -1 [template]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [template] {
+// CHECK:STDOUT:     .Core = %Core
+// CHECK:STDOUT:     .Less = %Less
+// CHECK:STDOUT:     .Negate = %Negate
+// CHECK:STDOUT:     .True = %True.decl
+// CHECK:STDOUT:     .False = %False.decl
+// CHECK:STDOUT:     .F = %F
+// CHECK:STDOUT:     .RuntimeCall = %RuntimeCall
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core: <namespace> = namespace [template] {}
+// CHECK:STDOUT:   %Less: <function> = fn_decl @Less [template] {
+// CHECK:STDOUT:     %a.loc2_9.1: f64 = param a
+// CHECK:STDOUT:     @Less.%a: f64 = bind_name a, %a.loc2_9.1
+// CHECK:STDOUT:     %b.loc2_17.1: f64 = param b
+// CHECK:STDOUT:     @Less.%b: f64 = bind_name b, %b.loc2_17.1
+// CHECK:STDOUT:     @Less.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Negate: <function> = fn_decl @Negate [template] {
+// CHECK:STDOUT:     %a.loc3_11.1: f64 = param a
+// CHECK:STDOUT:     @Negate.%a: f64 = bind_name a, %a.loc3_11.1
+// CHECK:STDOUT:     @Negate.%return: ref f64 = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %True.decl: type = class_decl @True [template = constants.%True] {}
+// CHECK:STDOUT:   %False.decl: type = class_decl @False [template = constants.%False] {}
+// CHECK:STDOUT:   %F: <function> = fn_decl @F [template] {
+// CHECK:STDOUT:     %True.ref: type = name_ref True, %True.decl [template = constants.%True]
+// CHECK:STDOUT:     %true_.loc8_6.1: True = param true_
+// CHECK:STDOUT:     @F.%true_: True = bind_name true_, %true_.loc8_6.1
+// CHECK:STDOUT:     %False.ref: type = name_ref False, %False.decl [template = constants.%False]
+// CHECK:STDOUT:     %false_.loc8_19.1: False = param false_
+// CHECK:STDOUT:     @F.%false_: False = bind_name false_, %false_.loc8_19.1
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %RuntimeCall: <function> = fn_decl @RuntimeCall [template] {
+// CHECK:STDOUT:     %a.loc16_16.1: f64 = param a
+// CHECK:STDOUT:     @RuntimeCall.%a: f64 = bind_name a, %a.loc16_16.1
+// CHECK:STDOUT:     %b.loc16_24.1: f64 = param b
+// CHECK:STDOUT:     @RuntimeCall.%b: f64 = bind_name b, %b.loc16_24.1
+// CHECK:STDOUT:     @RuntimeCall.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @True {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%True
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @False {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%False
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @Less(%a: f64, %b: f64) -> bool = "float.less";
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @Negate(%a: f64) -> f64 = "float.negate";
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F(%true_: True, %false_: False) {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %true_.ref.loc9: True = name_ref true_, %true_
+// CHECK:STDOUT:   %Less.ref.loc9: <function> = name_ref Less, file.%Less [template = file.%Less]
+// CHECK:STDOUT:   %.loc9_21: f64 = float_literal 1 [template = constants.%.4]
+// CHECK:STDOUT:   %.loc9_26: f64 = float_literal 2 [template = constants.%.5]
+// CHECK:STDOUT:   %float.less.loc9: init bool = call %Less.ref.loc9(%.loc9_21, %.loc9_26) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc9_13.1: bool = value_of_initializer %float.less.loc9 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc9_13.2: bool = converted %float.less.loc9, %.loc9_13.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc9_13.2 br !if.expr.then.loc9 else br !if.expr.else.loc9
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc9:
+// CHECK:STDOUT:   %True.ref.loc9: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%True.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc9:
+// CHECK:STDOUT:   %False.ref.loc9: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%False.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc9:
+// CHECK:STDOUT:   %.loc9_13.3: type = block_arg !if.expr.result.loc9 [template = constants.%True]
+// CHECK:STDOUT:   %false_.ref.loc10: False = name_ref false_, %false_
+// CHECK:STDOUT:   %Less.ref.loc10: <function> = name_ref Less, file.%Less [template = file.%Less]
+// CHECK:STDOUT:   %.loc10_22: f64 = float_literal 1 [template = constants.%.7]
+// CHECK:STDOUT:   %.loc10_27: f64 = float_literal 1 [template = constants.%.8]
+// CHECK:STDOUT:   %float.less.loc10: init bool = call %Less.ref.loc10(%.loc10_22, %.loc10_27) [template = constants.%.9]
+// CHECK:STDOUT:   %.loc10_14.1: bool = value_of_initializer %float.less.loc10 [template = constants.%.9]
+// CHECK:STDOUT:   %.loc10_14.2: bool = converted %float.less.loc10, %.loc10_14.1 [template = constants.%.9]
+// CHECK:STDOUT:   if %.loc10_14.2 br !if.expr.then.loc10 else br !if.expr.else.loc10
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc10:
+// CHECK:STDOUT:   %True.ref.loc10: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc10(%True.ref.loc10)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc10:
+// CHECK:STDOUT:   %False.ref.loc10: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc10(%False.ref.loc10)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc10:
+// CHECK:STDOUT:   %.loc10_14.3: type = block_arg !if.expr.result.loc10 [template = constants.%False]
+// CHECK:STDOUT:   %false_.ref.loc11: False = name_ref false_, %false_
+// CHECK:STDOUT:   %Less.ref.loc11: <function> = name_ref Less, file.%Less [template = file.%Less]
+// CHECK:STDOUT:   %.loc11_22: f64 = float_literal 1 [template = constants.%.10]
+// CHECK:STDOUT:   %.loc11_27: f64 = float_literal 0 [template = constants.%.11]
+// CHECK:STDOUT:   %float.less.loc11: init bool = call %Less.ref.loc11(%.loc11_22, %.loc11_27) [template = constants.%.9]
+// CHECK:STDOUT:   %.loc11_14.1: bool = value_of_initializer %float.less.loc11 [template = constants.%.9]
+// CHECK:STDOUT:   %.loc11_14.2: bool = converted %float.less.loc11, %.loc11_14.1 [template = constants.%.9]
+// CHECK:STDOUT:   if %.loc11_14.2 br !if.expr.then.loc11 else br !if.expr.else.loc11
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc11:
+// CHECK:STDOUT:   %True.ref.loc11: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc11(%True.ref.loc11)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc11:
+// CHECK:STDOUT:   %False.ref.loc11: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc11(%False.ref.loc11)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc11:
+// CHECK:STDOUT:   %.loc11_14.3: type = block_arg !if.expr.result.loc11 [template = constants.%False]
+// CHECK:STDOUT:   %true_.ref.loc12: True = name_ref true_, %true_
+// CHECK:STDOUT:   %Less.ref.loc12: <function> = name_ref Less, file.%Less [template = file.%Less]
+// CHECK:STDOUT:   %Negate.ref.loc12: <function> = name_ref Negate, file.%Negate [template = file.%Negate]
+// CHECK:STDOUT:   %.loc12_28: f64 = float_literal 1 [template = constants.%.12]
+// CHECK:STDOUT:   %float.negate.loc12: init f64 = call %Negate.ref.loc12(%.loc12_28) [template = constants.%.13]
+// CHECK:STDOUT:   %.loc12_34: f64 = float_literal 0 [template = constants.%.14]
+// CHECK:STDOUT:   %.loc12_20.1: f64 = value_of_initializer %float.negate.loc12 [template = constants.%.13]
+// CHECK:STDOUT:   %.loc12_20.2: f64 = converted %float.negate.loc12, %.loc12_20.1 [template = constants.%.13]
+// CHECK:STDOUT:   %float.less.loc12: init bool = call %Less.ref.loc12(%.loc12_20.2, %.loc12_34) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc12_13.1: bool = value_of_initializer %float.less.loc12 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc12_13.2: bool = converted %float.less.loc12, %.loc12_13.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc12_13.2 br !if.expr.then.loc12 else br !if.expr.else.loc12
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc12:
+// CHECK:STDOUT:   %True.ref.loc12: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc12(%True.ref.loc12)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc12:
+// CHECK:STDOUT:   %False.ref.loc12: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc12(%False.ref.loc12)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc12:
+// CHECK:STDOUT:   %.loc12_13.3: type = block_arg !if.expr.result.loc12 [template = constants.%True]
+// CHECK:STDOUT:   %false_.ref.loc13: False = name_ref false_, %false_
+// CHECK:STDOUT:   %Less.ref.loc13: <function> = name_ref Less, file.%Less [template = file.%Less]
+// CHECK:STDOUT:   %.loc13_22: f64 = float_literal 0 [template = constants.%.15]
+// CHECK:STDOUT:   %Negate.ref.loc13: <function> = name_ref Negate, file.%Negate [template = file.%Negate]
+// CHECK:STDOUT:   %.loc13_34: f64 = float_literal 1 [template = constants.%.16]
+// CHECK:STDOUT:   %float.negate.loc13: init f64 = call %Negate.ref.loc13(%.loc13_34) [template = constants.%.17]
+// CHECK:STDOUT:   %.loc13_21.1: f64 = value_of_initializer %float.negate.loc13 [template = constants.%.17]
+// CHECK:STDOUT:   %.loc13_21.2: f64 = converted %float.negate.loc13, %.loc13_21.1 [template = constants.%.17]
+// CHECK:STDOUT:   %float.less.loc13: init bool = call %Less.ref.loc13(%.loc13_22, %.loc13_21.2) [template = constants.%.9]
+// CHECK:STDOUT:   %.loc13_14.1: bool = value_of_initializer %float.less.loc13 [template = constants.%.9]
+// CHECK:STDOUT:   %.loc13_14.2: bool = converted %float.less.loc13, %.loc13_14.1 [template = constants.%.9]
+// CHECK:STDOUT:   if %.loc13_14.2 br !if.expr.then.loc13 else br !if.expr.else.loc13
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc13:
+// CHECK:STDOUT:   %True.ref.loc13: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc13(%True.ref.loc13)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc13:
+// CHECK:STDOUT:   %False.ref.loc13: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc13(%False.ref.loc13)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc13:
+// CHECK:STDOUT:   %.loc13_14.3: type = block_arg !if.expr.result.loc13 [template = constants.%False]
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @RuntimeCall(%a: f64, %b: f64) -> bool {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Less.ref: <function> = name_ref Less, file.%Less [template = file.%Less]
+// CHECK:STDOUT:   %a.ref: f64 = name_ref a, %a
+// CHECK:STDOUT:   %b.ref: f64 = name_ref b, %b
+// CHECK:STDOUT:   %float.less: init bool = call %Less.ref(%a.ref, %b.ref)
+// CHECK:STDOUT:   %.loc17_20.1: bool = value_of_initializer %float.less
+// CHECK:STDOUT:   %.loc17_20.2: bool = converted %float.less, %.loc17_20.1
+// CHECK:STDOUT:   return %.loc17_20.2
+// CHECK:STDOUT: }
+// CHECK:STDOUT:

toolchain/check/testdata/builtins/float/less_eq.carbon

@@ -0,0 +1,225 @@
+// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
+// Exceptions. See /LICENSE for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+// AUTOUPDATE
+
+// --- float_less_eq.carbon
+
+fn LessEq(a: f64, b: f64) -> bool = "float.less_eq";
+fn Negate(a: f64) -> f64 = "float.negate";
+
+class True {}
+class False {}
+
+fn F(true_: True, false_: False) {
+  true_ as (if LessEq(1.0, 2.0) then True else False);
+  true_ as (if LessEq(1.0, 1.0) then True else False);
+  false_ as (if LessEq(1.0, 0.0) then True else False);
+  true_ as (if LessEq(Negate(1.0), 0.0) then True else False);
+  false_ as (if LessEq(0.0, Negate(1.0)) then True else False);
+}
+
+fn RuntimeCall(a: f64, b: f64) -> bool {
+  return LessEq(a, b);
+}
+
+// CHECK:STDOUT: --- float_less_eq.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %True: type = class_type @True [template]
+// CHECK:STDOUT:   %.1: type = struct_type {} [template]
+// CHECK:STDOUT:   %False: type = class_type @False [template]
+// CHECK:STDOUT:   %.2: type = tuple_type () [template]
+// CHECK:STDOUT:   %.3: type = ptr_type {} [template]
+// CHECK:STDOUT:   %.4: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.5: f64 = float_literal 2 [template]
+// CHECK:STDOUT:   %.6: bool = bool_literal true [template]
+// CHECK:STDOUT:   %.7: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.8: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.9: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.10: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.11: bool = bool_literal false [template]
+// CHECK:STDOUT:   %.12: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.13: f64 = float_literal -1 [template]
+// CHECK:STDOUT:   %.14: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.15: f64 = float_literal 0 [template]
+// CHECK:STDOUT:   %.16: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.17: f64 = float_literal -1 [template]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [template] {
+// CHECK:STDOUT:     .Core = %Core
+// CHECK:STDOUT:     .LessEq = %LessEq
+// CHECK:STDOUT:     .Negate = %Negate
+// CHECK:STDOUT:     .True = %True.decl
+// CHECK:STDOUT:     .False = %False.decl
+// CHECK:STDOUT:     .F = %F
+// CHECK:STDOUT:     .RuntimeCall = %RuntimeCall
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core: <namespace> = namespace [template] {}
+// CHECK:STDOUT:   %LessEq: <function> = fn_decl @LessEq [template] {
+// CHECK:STDOUT:     %a.loc2_11.1: f64 = param a
+// CHECK:STDOUT:     @LessEq.%a: f64 = bind_name a, %a.loc2_11.1
+// CHECK:STDOUT:     %b.loc2_19.1: f64 = param b
+// CHECK:STDOUT:     @LessEq.%b: f64 = bind_name b, %b.loc2_19.1
+// CHECK:STDOUT:     @LessEq.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Negate: <function> = fn_decl @Negate [template] {
+// CHECK:STDOUT:     %a.loc3_11.1: f64 = param a
+// CHECK:STDOUT:     @Negate.%a: f64 = bind_name a, %a.loc3_11.1
+// CHECK:STDOUT:     @Negate.%return: ref f64 = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %True.decl: type = class_decl @True [template = constants.%True] {}
+// CHECK:STDOUT:   %False.decl: type = class_decl @False [template = constants.%False] {}
+// CHECK:STDOUT:   %F: <function> = fn_decl @F [template] {
+// CHECK:STDOUT:     %True.ref: type = name_ref True, %True.decl [template = constants.%True]
+// CHECK:STDOUT:     %true_.loc8_6.1: True = param true_
+// CHECK:STDOUT:     @F.%true_: True = bind_name true_, %true_.loc8_6.1
+// CHECK:STDOUT:     %False.ref: type = name_ref False, %False.decl [template = constants.%False]
+// CHECK:STDOUT:     %false_.loc8_19.1: False = param false_
+// CHECK:STDOUT:     @F.%false_: False = bind_name false_, %false_.loc8_19.1
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %RuntimeCall: <function> = fn_decl @RuntimeCall [template] {
+// CHECK:STDOUT:     %a.loc16_16.1: f64 = param a
+// CHECK:STDOUT:     @RuntimeCall.%a: f64 = bind_name a, %a.loc16_16.1
+// CHECK:STDOUT:     %b.loc16_24.1: f64 = param b
+// CHECK:STDOUT:     @RuntimeCall.%b: f64 = bind_name b, %b.loc16_24.1
+// CHECK:STDOUT:     @RuntimeCall.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @True {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%True
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @False {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%False
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @LessEq(%a: f64, %b: f64) -> bool = "float.less_eq";
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @Negate(%a: f64) -> f64 = "float.negate";
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F(%true_: True, %false_: False) {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %true_.ref.loc9: True = name_ref true_, %true_
+// CHECK:STDOUT:   %LessEq.ref.loc9: <function> = name_ref LessEq, file.%LessEq [template = file.%LessEq]
+// CHECK:STDOUT:   %.loc9_23: f64 = float_literal 1 [template = constants.%.4]
+// CHECK:STDOUT:   %.loc9_28: f64 = float_literal 2 [template = constants.%.5]
+// CHECK:STDOUT:   %float.less_eq.loc9: init bool = call %LessEq.ref.loc9(%.loc9_23, %.loc9_28) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc9_13.1: bool = value_of_initializer %float.less_eq.loc9 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc9_13.2: bool = converted %float.less_eq.loc9, %.loc9_13.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc9_13.2 br !if.expr.then.loc9 else br !if.expr.else.loc9
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc9:
+// CHECK:STDOUT:   %True.ref.loc9: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%True.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc9:
+// CHECK:STDOUT:   %False.ref.loc9: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%False.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc9:
+// CHECK:STDOUT:   %.loc9_13.3: type = block_arg !if.expr.result.loc9 [template = constants.%True]
+// CHECK:STDOUT:   %true_.ref.loc10: True = name_ref true_, %true_
+// CHECK:STDOUT:   %LessEq.ref.loc10: <function> = name_ref LessEq, file.%LessEq [template = file.%LessEq]
+// CHECK:STDOUT:   %.loc10_23: f64 = float_literal 1 [template = constants.%.7]
+// CHECK:STDOUT:   %.loc10_28: f64 = float_literal 1 [template = constants.%.8]
+// CHECK:STDOUT:   %float.less_eq.loc10: init bool = call %LessEq.ref.loc10(%.loc10_23, %.loc10_28) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc10_13.1: bool = value_of_initializer %float.less_eq.loc10 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc10_13.2: bool = converted %float.less_eq.loc10, %.loc10_13.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc10_13.2 br !if.expr.then.loc10 else br !if.expr.else.loc10
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc10:
+// CHECK:STDOUT:   %True.ref.loc10: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc10(%True.ref.loc10)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc10:
+// CHECK:STDOUT:   %False.ref.loc10: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc10(%False.ref.loc10)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc10:
+// CHECK:STDOUT:   %.loc10_13.3: type = block_arg !if.expr.result.loc10 [template = constants.%True]
+// CHECK:STDOUT:   %false_.ref.loc11: False = name_ref false_, %false_
+// CHECK:STDOUT:   %LessEq.ref.loc11: <function> = name_ref LessEq, file.%LessEq [template = file.%LessEq]
+// CHECK:STDOUT:   %.loc11_24: f64 = float_literal 1 [template = constants.%.9]
+// CHECK:STDOUT:   %.loc11_29: f64 = float_literal 0 [template = constants.%.10]
+// CHECK:STDOUT:   %float.less_eq.loc11: init bool = call %LessEq.ref.loc11(%.loc11_24, %.loc11_29) [template = constants.%.11]
+// CHECK:STDOUT:   %.loc11_14.1: bool = value_of_initializer %float.less_eq.loc11 [template = constants.%.11]
+// CHECK:STDOUT:   %.loc11_14.2: bool = converted %float.less_eq.loc11, %.loc11_14.1 [template = constants.%.11]
+// CHECK:STDOUT:   if %.loc11_14.2 br !if.expr.then.loc11 else br !if.expr.else.loc11
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc11:
+// CHECK:STDOUT:   %True.ref.loc11: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc11(%True.ref.loc11)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc11:
+// CHECK:STDOUT:   %False.ref.loc11: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc11(%False.ref.loc11)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc11:
+// CHECK:STDOUT:   %.loc11_14.3: type = block_arg !if.expr.result.loc11 [template = constants.%False]
+// CHECK:STDOUT:   %true_.ref.loc12: True = name_ref true_, %true_
+// CHECK:STDOUT:   %LessEq.ref.loc12: <function> = name_ref LessEq, file.%LessEq [template = file.%LessEq]
+// CHECK:STDOUT:   %Negate.ref.loc12: <function> = name_ref Negate, file.%Negate [template = file.%Negate]
+// CHECK:STDOUT:   %.loc12_30: f64 = float_literal 1 [template = constants.%.12]
+// CHECK:STDOUT:   %float.negate.loc12: init f64 = call %Negate.ref.loc12(%.loc12_30) [template = constants.%.13]
+// CHECK:STDOUT:   %.loc12_36: f64 = float_literal 0 [template = constants.%.14]
+// CHECK:STDOUT:   %.loc12_22.1: f64 = value_of_initializer %float.negate.loc12 [template = constants.%.13]
+// CHECK:STDOUT:   %.loc12_22.2: f64 = converted %float.negate.loc12, %.loc12_22.1 [template = constants.%.13]
+// CHECK:STDOUT:   %float.less_eq.loc12: init bool = call %LessEq.ref.loc12(%.loc12_22.2, %.loc12_36) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc12_13.1: bool = value_of_initializer %float.less_eq.loc12 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc12_13.2: bool = converted %float.less_eq.loc12, %.loc12_13.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc12_13.2 br !if.expr.then.loc12 else br !if.expr.else.loc12
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc12:
+// CHECK:STDOUT:   %True.ref.loc12: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc12(%True.ref.loc12)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc12:
+// CHECK:STDOUT:   %False.ref.loc12: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc12(%False.ref.loc12)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc12:
+// CHECK:STDOUT:   %.loc12_13.3: type = block_arg !if.expr.result.loc12 [template = constants.%True]
+// CHECK:STDOUT:   %false_.ref.loc13: False = name_ref false_, %false_
+// CHECK:STDOUT:   %LessEq.ref.loc13: <function> = name_ref LessEq, file.%LessEq [template = file.%LessEq]
+// CHECK:STDOUT:   %.loc13_24: f64 = float_literal 0 [template = constants.%.15]
+// CHECK:STDOUT:   %Negate.ref.loc13: <function> = name_ref Negate, file.%Negate [template = file.%Negate]
+// CHECK:STDOUT:   %.loc13_36: f64 = float_literal 1 [template = constants.%.16]
+// CHECK:STDOUT:   %float.negate.loc13: init f64 = call %Negate.ref.loc13(%.loc13_36) [template = constants.%.17]
+// CHECK:STDOUT:   %.loc13_23.1: f64 = value_of_initializer %float.negate.loc13 [template = constants.%.17]
+// CHECK:STDOUT:   %.loc13_23.2: f64 = converted %float.negate.loc13, %.loc13_23.1 [template = constants.%.17]
+// CHECK:STDOUT:   %float.less_eq.loc13: init bool = call %LessEq.ref.loc13(%.loc13_24, %.loc13_23.2) [template = constants.%.11]
+// CHECK:STDOUT:   %.loc13_14.1: bool = value_of_initializer %float.less_eq.loc13 [template = constants.%.11]
+// CHECK:STDOUT:   %.loc13_14.2: bool = converted %float.less_eq.loc13, %.loc13_14.1 [template = constants.%.11]
+// CHECK:STDOUT:   if %.loc13_14.2 br !if.expr.then.loc13 else br !if.expr.else.loc13
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc13:
+// CHECK:STDOUT:   %True.ref.loc13: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc13(%True.ref.loc13)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc13:
+// CHECK:STDOUT:   %False.ref.loc13: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc13(%False.ref.loc13)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc13:
+// CHECK:STDOUT:   %.loc13_14.3: type = block_arg !if.expr.result.loc13 [template = constants.%False]
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @RuntimeCall(%a: f64, %b: f64) -> bool {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %LessEq.ref: <function> = name_ref LessEq, file.%LessEq [template = file.%LessEq]
+// CHECK:STDOUT:   %a.ref: f64 = name_ref a, %a
+// CHECK:STDOUT:   %b.ref: f64 = name_ref b, %b
+// CHECK:STDOUT:   %float.less_eq: init bool = call %LessEq.ref(%a.ref, %b.ref)
+// CHECK:STDOUT:   %.loc17_22.1: bool = value_of_initializer %float.less_eq
+// CHECK:STDOUT:   %.loc17_22.2: bool = converted %float.less_eq, %.loc17_22.1
+// CHECK:STDOUT:   return %.loc17_22.2
+// CHECK:STDOUT: }
+// CHECK:STDOUT:

toolchain/check/testdata/builtins/float/neq.carbon

@@ -0,0 +1,168 @@
+// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
+// Exceptions. See /LICENSE for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+// AUTOUPDATE
+
+// --- float_neq.carbon
+
+fn Neq(a: f64, b: f64) -> bool = "float.neq";
+
+class True {}
+class False {}
+
+fn F(true_: True, false_: False) {
+  true_ as (if Neq(1.0, 2.0) then True else False);
+  false_ as (if Neq(1.0, 1.0) then True else False);
+}
+
+fn RuntimeCall(a: f64, b: f64) -> bool {
+  return Neq(a, b);
+}
+
+// --- fail_bad_decl.carbon
+
+package FailBadDecl api;
+
+// CHECK:STDERR: fail_bad_decl.carbon:[[@LINE+3]]:1: ERROR: Invalid signature for builtin function "float.neq".
+// CHECK:STDERR: fn WrongResult(a: f64, b: f64) -> f64 = "float.neq";
+// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+fn WrongResult(a: f64, b: f64) -> f64 = "float.neq";
+
+// CHECK:STDOUT: --- float_neq.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %True: type = class_type @True [template]
+// CHECK:STDOUT:   %.1: type = struct_type {} [template]
+// CHECK:STDOUT:   %False: type = class_type @False [template]
+// CHECK:STDOUT:   %.2: type = tuple_type () [template]
+// CHECK:STDOUT:   %.3: type = ptr_type {} [template]
+// CHECK:STDOUT:   %.4: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.5: f64 = float_literal 2 [template]
+// CHECK:STDOUT:   %.6: bool = bool_literal true [template]
+// CHECK:STDOUT:   %.7: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.8: f64 = float_literal 1 [template]
+// CHECK:STDOUT:   %.9: bool = bool_literal false [template]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [template] {
+// CHECK:STDOUT:     .Core = %Core
+// CHECK:STDOUT:     .Neq = %Neq
+// CHECK:STDOUT:     .True = %True.decl
+// CHECK:STDOUT:     .False = %False.decl
+// CHECK:STDOUT:     .F = %F
+// CHECK:STDOUT:     .RuntimeCall = %RuntimeCall
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core: <namespace> = namespace [template] {}
+// CHECK:STDOUT:   %Neq: <function> = fn_decl @Neq [template] {
+// CHECK:STDOUT:     %a.loc2_8.1: f64 = param a
+// CHECK:STDOUT:     @Neq.%a: f64 = bind_name a, %a.loc2_8.1
+// CHECK:STDOUT:     %b.loc2_16.1: f64 = param b
+// CHECK:STDOUT:     @Neq.%b: f64 = bind_name b, %b.loc2_16.1
+// CHECK:STDOUT:     @Neq.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %True.decl: type = class_decl @True [template = constants.%True] {}
+// CHECK:STDOUT:   %False.decl: type = class_decl @False [template = constants.%False] {}
+// CHECK:STDOUT:   %F: <function> = fn_decl @F [template] {
+// CHECK:STDOUT:     %True.ref: type = name_ref True, %True.decl [template = constants.%True]
+// CHECK:STDOUT:     %true_.loc7_6.1: True = param true_
+// CHECK:STDOUT:     @F.%true_: True = bind_name true_, %true_.loc7_6.1
+// CHECK:STDOUT:     %False.ref: type = name_ref False, %False.decl [template = constants.%False]
+// CHECK:STDOUT:     %false_.loc7_19.1: False = param false_
+// CHECK:STDOUT:     @F.%false_: False = bind_name false_, %false_.loc7_19.1
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %RuntimeCall: <function> = fn_decl @RuntimeCall [template] {
+// CHECK:STDOUT:     %a.loc12_16.1: f64 = param a
+// CHECK:STDOUT:     @RuntimeCall.%a: f64 = bind_name a, %a.loc12_16.1
+// CHECK:STDOUT:     %b.loc12_24.1: f64 = param b
+// CHECK:STDOUT:     @RuntimeCall.%b: f64 = bind_name b, %b.loc12_24.1
+// CHECK:STDOUT:     @RuntimeCall.%return: ref bool = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @True {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%True
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: class @False {
+// CHECK:STDOUT: !members:
+// CHECK:STDOUT:   .Self = constants.%False
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @Neq(%a: f64, %b: f64) -> bool = "float.neq";
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F(%true_: True, %false_: False) {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %true_.ref: True = name_ref true_, %true_
+// CHECK:STDOUT:   %Neq.ref.loc8: <function> = name_ref Neq, file.%Neq [template = file.%Neq]
+// CHECK:STDOUT:   %.loc8_20: f64 = float_literal 1 [template = constants.%.4]
+// CHECK:STDOUT:   %.loc8_25: f64 = float_literal 2 [template = constants.%.5]
+// CHECK:STDOUT:   %float.neq.loc8: init bool = call %Neq.ref.loc8(%.loc8_20, %.loc8_25) [template = constants.%.6]
+// CHECK:STDOUT:   %.loc8_13.1: bool = value_of_initializer %float.neq.loc8 [template = constants.%.6]
+// CHECK:STDOUT:   %.loc8_13.2: bool = converted %float.neq.loc8, %.loc8_13.1 [template = constants.%.6]
+// CHECK:STDOUT:   if %.loc8_13.2 br !if.expr.then.loc8 else br !if.expr.else.loc8
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc8:
+// CHECK:STDOUT:   %True.ref.loc8: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc8(%True.ref.loc8)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc8:
+// CHECK:STDOUT:   %False.ref.loc8: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc8(%False.ref.loc8)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc8:
+// CHECK:STDOUT:   %.loc8_13.3: type = block_arg !if.expr.result.loc8 [template = constants.%True]
+// CHECK:STDOUT:   %false_.ref: False = name_ref false_, %false_
+// CHECK:STDOUT:   %Neq.ref.loc9: <function> = name_ref Neq, file.%Neq [template = file.%Neq]
+// CHECK:STDOUT:   %.loc9_21: f64 = float_literal 1 [template = constants.%.7]
+// CHECK:STDOUT:   %.loc9_26: f64 = float_literal 1 [template = constants.%.8]
+// CHECK:STDOUT:   %float.neq.loc9: init bool = call %Neq.ref.loc9(%.loc9_21, %.loc9_26) [template = constants.%.9]
+// CHECK:STDOUT:   %.loc9_14.1: bool = value_of_initializer %float.neq.loc9 [template = constants.%.9]
+// CHECK:STDOUT:   %.loc9_14.2: bool = converted %float.neq.loc9, %.loc9_14.1 [template = constants.%.9]
+// CHECK:STDOUT:   if %.loc9_14.2 br !if.expr.then.loc9 else br !if.expr.else.loc9
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.then.loc9:
+// CHECK:STDOUT:   %True.ref.loc9: type = name_ref True, file.%True.decl [template = constants.%True]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%True.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.else.loc9:
+// CHECK:STDOUT:   %False.ref.loc9: type = name_ref False, file.%False.decl [template = constants.%False]
+// CHECK:STDOUT:   br !if.expr.result.loc9(%False.ref.loc9)
+// CHECK:STDOUT:
+// CHECK:STDOUT: !if.expr.result.loc9:
+// CHECK:STDOUT:   %.loc9_14.3: type = block_arg !if.expr.result.loc9 [template = constants.%False]
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @RuntimeCall(%a: f64, %b: f64) -> bool {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Neq.ref: <function> = name_ref Neq, file.%Neq [template = file.%Neq]
+// CHECK:STDOUT:   %a.ref: f64 = name_ref a, %a
+// CHECK:STDOUT:   %b.ref: f64 = name_ref b, %b
+// CHECK:STDOUT:   %float.neq: init bool = call %Neq.ref(%a.ref, %b.ref)
+// CHECK:STDOUT:   %.loc13_19.1: bool = value_of_initializer %float.neq
+// CHECK:STDOUT:   %.loc13_19.2: bool = converted %float.neq, %.loc13_19.1
+// CHECK:STDOUT:   return %.loc13_19.2
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- fail_bad_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [template] {
+// CHECK:STDOUT:     .Core = %Core
+// CHECK:STDOUT:     .WrongResult = %WrongResult
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core: <namespace> = namespace [template] {}
+// CHECK:STDOUT:   %WrongResult: <function> = fn_decl @WrongResult [template] {
+// CHECK:STDOUT:     %a.loc7_16.1: f64 = param a
+// CHECK:STDOUT:     @WrongResult.%a: f64 = bind_name a, %a.loc7_16.1
+// CHECK:STDOUT:     %b.loc7_24.1: f64 = param b
+// CHECK:STDOUT:     @WrongResult.%b: f64 = bind_name b, %b.loc7_24.1
+// CHECK:STDOUT:     @WrongResult.%return: ref f64 = var <return slot>
+// CHECK:STDOUT:   }
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @WrongResult(%a: f64, %b: f64) -> f64;
+// CHECK:STDOUT:

toolchain/lower/handle.cpp

@@ -200,6 +200,28 @@ static auto GetBuiltinICmpPredicate(SemIR::BuiltinFunctionKind builtin_kind,
   }
 }
 
+// Get the predicate to use for an `fcmp` instruction generated for the
+// specified builtin.
+static auto GetBuiltinFCmpPredicate(SemIR::BuiltinFunctionKind builtin_kind)
+    -> llvm::CmpInst::Predicate {
+  switch (builtin_kind) {
+    case SemIR::BuiltinFunctionKind::FloatEq:
+      return llvm::CmpInst::FCMP_OEQ;
+    case SemIR::BuiltinFunctionKind::FloatNeq:
+      return llvm::CmpInst::FCMP_ONE;
+    case SemIR::BuiltinFunctionKind::FloatLess:
+      return llvm::CmpInst::FCMP_OLT;
+    case SemIR::BuiltinFunctionKind::FloatLessEq:
+      return llvm::CmpInst::FCMP_OLE;
+    case SemIR::BuiltinFunctionKind::FloatGreater:
+      return llvm::CmpInst::FCMP_OGT;
+    case SemIR::BuiltinFunctionKind::FloatGreaterEq:
+      return llvm::CmpInst::FCMP_OGE;
+    default:
+      CARBON_FATAL() << "Unexpected builtin kind " << builtin_kind;
+  }
+}
+
 // Returns whether the specified instruction has a signed integer type.
 static auto IsSignedInt(FunctionContext& context, SemIR::InstId int_id)
     -> bool {
@@ -400,6 +422,18 @@ static auto HandleBuiltinCall(FunctionContext& context, SemIR::InstId inst_id,
                                     context.GetValue(arg_ids[1]), "fdiv"));
       return;
     }
+    case SemIR::BuiltinFunctionKind::FloatEq:
+    case SemIR::BuiltinFunctionKind::FloatNeq:
+    case SemIR::BuiltinFunctionKind::FloatLess:
+    case SemIR::BuiltinFunctionKind::FloatLessEq:
+    case SemIR::BuiltinFunctionKind::FloatGreater:
+    case SemIR::BuiltinFunctionKind::FloatGreaterEq: {
+      context.SetLocal(inst_id, context.builder().CreateFCmp(
+                                    GetBuiltinFCmpPredicate(builtin_kind),
+                                    context.GetValue(arg_ids[0]),
+                                    context.GetValue(arg_ids[1])));
+      return;
+    }
   }
 
   CARBON_FATAL() << "Unsupported builtin call.";

toolchain/lower/testdata/builtins/float.carbon

@@ -19,6 +19,24 @@ fn TestMul(a: f64, b: f64) -> f64 { return Mul(a, b); }
 fn Div(a: f64, b: f64) -> f64 = "float.div";
 fn TestDiv(a: f64, b: f64) -> f64 { return Div(a, b); }
 
+fn Eq(a: f64, b: f64) -> bool = "float.eq";
+fn TestEq(a: f64, b: f64) -> bool { return Eq(a, b); }
+
+fn Neq(a: f64, b: f64) -> bool = "float.neq";
+fn TestNeq(a: f64, b: f64) -> bool { return Neq(a, b); }
+
+fn Less(a: f64, b: f64) -> bool = "float.less";
+fn TestLess(a: f64, b: f64) -> bool { return Less(a, b); }
+
+fn LessEq(a: f64, b: f64) -> bool = "float.less_eq";
+fn TestLessEq(a: f64, b: f64) -> bool { return LessEq(a, b); }
+
+fn Greater(a: f64, b: f64) -> bool = "float.greater";
+fn TestGreater(a: f64, b: f64) -> bool { return Greater(a, b); }
+
+fn GreaterEq(a: f64, b: f64) -> bool = "float.greater_eq";
+fn TestGreaterEq(a: f64, b: f64) -> bool { return GreaterEq(a, b); }
+
 // CHECK:STDOUT: ; ModuleID = 'float.carbon'
 // CHECK:STDOUT: source_filename = "float.carbon"
 // CHECK:STDOUT:
@@ -51,3 +69,39 @@ fn TestDiv(a: f64, b: f64) -> f64 { return Div(a, b); }
 // CHECK:STDOUT:   %float.div.fdiv = fdiv double %a, %b
 // CHECK:STDOUT:   ret double %float.div.fdiv
 // CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: define i1 @TestEq(double %a, double %b) {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %float.eq = fcmp oeq double %a, %b
+// CHECK:STDOUT:   ret i1 %float.eq
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: define i1 @TestNeq(double %a, double %b) {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %float.neq = fcmp one double %a, %b
+// CHECK:STDOUT:   ret i1 %float.neq
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: define i1 @TestLess(double %a, double %b) {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %float.less = fcmp olt double %a, %b
+// CHECK:STDOUT:   ret i1 %float.less
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: define i1 @TestLessEq(double %a, double %b) {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %float.less_eq = fcmp ole double %a, %b
+// CHECK:STDOUT:   ret i1 %float.less_eq
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: define i1 @TestGreater(double %a, double %b) {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %float.greater = fcmp ogt double %a, %b
+// CHECK:STDOUT:   ret i1 %float.greater
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: define i1 @TestGreaterEq(double %a, double %b) {
+// CHECK:STDOUT: entry:
+// CHECK:STDOUT:   %float.greater_eq = fcmp oge double %a, %b
+// CHECK:STDOUT:   ret i1 %float.greater_eq
+// CHECK:STDOUT: }

toolchain/sem_ir/builtin_function_kind.cpp

@@ -295,6 +295,30 @@ constexpr BuiltinInfo FloatMul = {
 constexpr BuiltinInfo FloatDiv = {
     "float.div", ValidateSignature<auto(FloatT, FloatT)->FloatT>};
 
+// "float.eq": float equality comparison.
+constexpr BuiltinInfo FloatEq = {"float.eq",
+                                 ValidateSignature<auto(FloatT, FloatT)->Bool>};
+
+// "float.neq": float non-equality comparison.
+constexpr BuiltinInfo FloatNeq = {
+    "float.neq", ValidateSignature<auto(FloatT, FloatT)->Bool>};
+
+// "float.less": float less than comparison.
+constexpr BuiltinInfo FloatLess = {
+    "float.less", ValidateSignature<auto(FloatT, FloatT)->Bool>};
+
+// "float.less_eq": float less than or equal comparison.
+constexpr BuiltinInfo FloatLessEq = {
+    "float.less_eq", ValidateSignature<auto(FloatT, FloatT)->Bool>};
+
+// "float.greater": float greater than comparison.
+constexpr BuiltinInfo FloatGreater = {
+    "float.greater", ValidateSignature<auto(FloatT, FloatT)->Bool>};
+
+// "float.greater_eq": float greater than or equal comparison.
+constexpr BuiltinInfo FloatGreaterEq = {
+    "float.greater_eq", ValidateSignature<auto(FloatT, FloatT)->Bool>};
+
 }  // namespace BuiltinFunctionInfo
 
 CARBON_DEFINE_ENUM_CLASS_NAMES(BuiltinFunctionKind) = {

toolchain/sem_ir/builtin_function_kind.def

@@ -62,4 +62,12 @@ CARBON_SEM_IR_BUILTIN_FUNCTION_KIND(FloatSub)
 CARBON_SEM_IR_BUILTIN_FUNCTION_KIND(FloatMul)
 CARBON_SEM_IR_BUILTIN_FUNCTION_KIND(FloatDiv)
 
+// Float comparison.
+CARBON_SEM_IR_BUILTIN_FUNCTION_KIND(FloatEq)
+CARBON_SEM_IR_BUILTIN_FUNCTION_KIND(FloatNeq)
+CARBON_SEM_IR_BUILTIN_FUNCTION_KIND(FloatLess)
+CARBON_SEM_IR_BUILTIN_FUNCTION_KIND(FloatLessEq)
+CARBON_SEM_IR_BUILTIN_FUNCTION_KIND(FloatGreater)
+CARBON_SEM_IR_BUILTIN_FUNCTION_KIND(FloatGreaterEq)
+
 #undef CARBON_SEM_IR_BUILTIN_FUNCTION_KIND