carbon-lang/toolchain/lower/testdata/interop/cpp/template.carbon

// 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
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/int.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/interop/cpp/template.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/interop/cpp/template.carbon

// --- function_template.h

template<typename T> T identity(T x) { return x; }

class Class {};

// --- call.carbon

library "[[@TEST_NAME]]";

import Cpp library "function_template.h";

fn PassI32(a: i32) -> i32 {
  return Cpp.identity(a);
}

fn PassClass(a: Cpp.Class) -> Cpp.Class {
  return Cpp.identity(a);
}

// CHECK:STDOUT: ; ModuleID = 'call.carbon'
// CHECK:STDOUT: source_filename = "call.carbon"
// CHECK:STDOUT: target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
// CHECK:STDOUT: target triple = "x86_64-unknown-linux-gnu"
// CHECK:STDOUT:
// CHECK:STDOUT: %class.Class = type { i8 }
// CHECK:STDOUT:
// CHECK:STDOUT: $_Z8identityIiET_S0_ = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: $_Z8identityI5ClassET_S1_ = comdat any
// CHECK:STDOUT:
// CHECK:STDOUT: define i32 @_CPassI32.Main(i32 %a) !dbg !7 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %identity.call = call i32 @_Z8identityIiET_S0_(i32 %a), !dbg !10
// CHECK:STDOUT:   ret i32 %identity.call, !dbg !11
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: define void @_CPassClass.Main(ptr sret({}) %return, ptr %a) !dbg !12 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   call void @_Z8identityI5ClassET_S1_.carbon_thunk(ptr %a, ptr %return), !dbg !13
// CHECK:STDOUT:   ret void, !dbg !14
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: mustprogress noinline nounwind optnone
// CHECK:STDOUT: define linkonce_odr dso_local i32 @_Z8identityIiET_S0_(i32 %x) #0 comdat {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %x.addr = alloca i32, align 4
// CHECK:STDOUT:   store i32 %x, ptr %x.addr, align 4
// CHECK:STDOUT:   %0 = load i32, ptr %x.addr, align 4
// CHECK:STDOUT:   ret i32 %0
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: alwaysinline mustprogress
// CHECK:STDOUT: define dso_local void @_Z8identityI5ClassET_S1_.carbon_thunk(ptr %x, ptr %return) #1 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %x.addr = alloca ptr, align 8
// CHECK:STDOUT:   %return.addr = alloca ptr, align 8
// CHECK:STDOUT:   %agg.tmp = alloca %class.Class, align 1
// CHECK:STDOUT:   %undef.agg.tmp = alloca %class.Class, align 1
// CHECK:STDOUT:   store ptr %x, ptr %x.addr, align 8
// CHECK:STDOUT:   store ptr %return, ptr %return.addr, align 8
// CHECK:STDOUT:   %0 = load ptr, ptr %return.addr, align 8
// CHECK:STDOUT:   %1 = load ptr, ptr %x.addr, align 8
// CHECK:STDOUT:   call void @_Z8identityI5ClassET_S1_()
// CHECK:STDOUT:   ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: mustprogress noinline nounwind optnone
// CHECK:STDOUT: define linkonce_odr dso_local void @_Z8identityI5ClassET_S1_() #0 comdat {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %x = alloca %class.Class, align 1
// CHECK:STDOUT:   ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { mustprogress noinline nounwind optnone "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="0" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
// CHECK:STDOUT: attributes #1 = { alwaysinline mustprogress "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="0" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1, !2, !3, !4}
// CHECK:STDOUT: !llvm.dbg.cu = !{!5}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = !{i32 1, !"wchar_size", i32 4}
// CHECK:STDOUT: !3 = !{i32 8, !"PIC Level", i32 0}
// CHECK:STDOUT: !4 = !{i32 7, !"PIE Level", i32 2}
// CHECK:STDOUT: !5 = distinct !DICompileUnit(language: DW_LANG_C, file: !6, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !6 = !DIFile(filename: "call.carbon", directory: "")
// CHECK:STDOUT: !7 = distinct !DISubprogram(name: "PassI32", linkageName: "_CPassI32.Main", scope: null, file: !6, line: 6, type: !8, spFlags: DISPFlagDefinition, unit: !5)
// CHECK:STDOUT: !8 = !DISubroutineType(types: !9)
// CHECK:STDOUT: !9 = !{}
// CHECK:STDOUT: !10 = !DILocation(line: 7, column: 10, scope: !7)
// CHECK:STDOUT: !11 = !DILocation(line: 7, column: 3, scope: !7)
// CHECK:STDOUT: !12 = distinct !DISubprogram(name: "PassClass", linkageName: "_CPassClass.Main", scope: null, file: !6, line: 10, type: !8, spFlags: DISPFlagDefinition, unit: !5)
// CHECK:STDOUT: !13 = !DILocation(line: 11, column: 10, scope: !12)
// CHECK:STDOUT: !14 = !DILocation(line: 11, column: 3, scope: !12)