carbon-lang/toolchain/lower/testdata/index/array_element_access.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
//
// AUTOUPDATE
fn A() -> (i32, i32) { return (1, 2); }

fn B() -> [i32; 2] { return (1, 2); }

fn Run() {
  var a: [i32; 2] = A();
  var b: i32 = A()[0];
  var c: i32 = a[b];
  var d: i32 = B()[1];
}

// CHECK:STDOUT: ; ModuleID = 'array_element_access.carbon'
// CHECK:STDOUT: source_filename = "array_element_access.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @tuple = internal constant { i32, i32 } { i32 1, i32 2 }
// CHECK:STDOUT: @tuple.1 = internal constant [2 x i32] [i32 1, i32 2]
// CHECK:STDOUT:
// CHECK:STDOUT: define void @A(ptr sret({ i32, i32 }) %return) {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %.loc6_36.2.tuple.elem = getelementptr inbounds { i32, i32 }, ptr %return, i32 0, i32 0
// CHECK:STDOUT:   %.loc6_36.4.tuple.elem = getelementptr inbounds { i32, i32 }, ptr %return, i32 0, i32 1
// CHECK:STDOUT:   call void @llvm.memcpy.p0.p0.i64(ptr align 4 %return, ptr align 4 @tuple, i64 8, i1 false)
// CHECK:STDOUT:   ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: define void @B(ptr sret([2 x i32]) %return) {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %.loc8_34.3.array.index = getelementptr inbounds [2 x i32], ptr %return, i32 0, i32 0
// CHECK:STDOUT:   %.loc8_34.6.array.index = getelementptr inbounds [2 x i32], ptr %return, i32 0, i32 1
// CHECK:STDOUT:   call void @llvm.memcpy.p0.p0.i64(ptr align 4 %return, ptr align 4 @tuple.1, i64 8, i1 false)
// CHECK:STDOUT:   ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: define void @main() {
// CHECK:STDOUT: entry:
// CHECK:STDOUT:   %a.var = alloca [2 x i32], align 4
// CHECK:STDOUT:   %.loc11_22.1.temp = alloca { i32, i32 }, align 8
// CHECK:STDOUT:   call void @A(ptr %.loc11_22.1.temp)
// CHECK:STDOUT:   %.loc11_22.3.tuple.elem = getelementptr inbounds { i32, i32 }, ptr %.loc11_22.1.temp, i32 0, i32 0
// CHECK:STDOUT:   %.loc11_22.4 = load i32, ptr %.loc11_22.3.tuple.elem, align 4
// CHECK:STDOUT:   %.loc11_22.6.array.index = getelementptr inbounds [2 x i32], ptr %a.var, i32 0, i32 0
// CHECK:STDOUT:   store i32 %.loc11_22.4, ptr %.loc11_22.6.array.index, align 4
// CHECK:STDOUT:   %.loc11_22.8.tuple.elem = getelementptr inbounds { i32, i32 }, ptr %.loc11_22.1.temp, i32 0, i32 1
// CHECK:STDOUT:   %.loc11_22.9 = load i32, ptr %.loc11_22.8.tuple.elem, align 4
// CHECK:STDOUT:   %.loc11_22.11.array.index = getelementptr inbounds [2 x i32], ptr %a.var, i32 0, i32 1
// CHECK:STDOUT:   store i32 %.loc11_22.9, ptr %.loc11_22.11.array.index, align 4
// CHECK:STDOUT:   %b.var = alloca i32, align 4
// CHECK:STDOUT:   %.loc12_17.1.temp = alloca { i32, i32 }, align 8
// CHECK:STDOUT:   call void @A(ptr %.loc12_17.1.temp)
// CHECK:STDOUT:   %.loc12_21.1.tuple.index = getelementptr inbounds { i32, i32 }, ptr %.loc12_17.1.temp, i32 0, i32 0
// CHECK:STDOUT:   %.loc12_21.2 = load i32, ptr %.loc12_21.1.tuple.index, align 4
// CHECK:STDOUT:   store i32 %.loc12_21.2, ptr %b.var, align 4
// CHECK:STDOUT:   %c.var = alloca i32, align 4
// CHECK:STDOUT:   %.loc13_18 = load i32, ptr %b.var, align 4
// CHECK:STDOUT:   %.loc13_19.1.array.index = getelementptr inbounds [2 x i32], ptr %a.var, i32 0, i32 %.loc13_18
// CHECK:STDOUT:   %.loc13_19.2 = load i32, ptr %.loc13_19.1.array.index, align 4
// CHECK:STDOUT:   store i32 %.loc13_19.2, ptr %c.var, align 4
// CHECK:STDOUT:   %d.var = alloca i32, align 4
// CHECK:STDOUT:   %.loc14_17.1.temp = alloca [2 x i32], align 4
// CHECK:STDOUT:   call void @B(ptr %.loc14_17.1.temp)
// CHECK:STDOUT:   %.loc14_21.1.array.index = getelementptr inbounds [2 x i32], ptr %.loc14_17.1.temp, i32 0, i32 1
// CHECK:STDOUT:   %.loc14_21.2 = load i32, ptr %.loc14_21.1.array.index, align 4
// CHECK:STDOUT:   store i32 %.loc14_21.2, ptr %d.var, align 4
// CHECK:STDOUT:   ret void
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder i32 1, { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 11 }
// CHECK:STDOUT: uselistorder ptr @llvm.memcpy.p0.p0.i64, { 1, 0 }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }