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carbon-lang/toolchain/lower/testdata/array/base.carbon
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Richard Smith c04d62a7d1 Ensure that all allocas are created in the entry block. (#4685) 
Non-entry-block allocas will allocate new stack memory each time they're
reached, resulting in leaking stack memory over time for allocas in a
loop. Move all such allocas to the entry block instead, and use an LLVM
intrinsic to mark when the lifetime of the variable actually begins.
2024-12-17 00:55:06 +00:00

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// 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
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/array/base.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/array/base.carbon
fn Run() {
var a: [i32; 1] = (1,);
var b: [f64; 2] = (11.1, 2.2,);
var c: [(); 5] = ((), (), (), (), (),);
var d: (i32, i32, i32) = (1, 2, 3);
var e: [i32; 3] = d;
}
// CHECK:STDOUT: ; ModuleID = 'base.carbon'
// CHECK:STDOUT: source_filename = "base.carbon"
// CHECK:STDOUT:
// CHECK:STDOUT: @array.1.loc12_25 = internal constant [1 x i32] [i32 1]
// CHECK:STDOUT: @array.2.loc13_33 = internal constant [2 x double] [double 0x4026333333333334, double 2.200000e+00]
// CHECK:STDOUT: @array.3.loc14_41 = internal constant [5 x {}] zeroinitializer
// CHECK:STDOUT: @tuple.loc15_37 = internal constant { i32, i32, i32 } { i32 1, i32 2, i32 3 }
// CHECK:STDOUT:
// CHECK:STDOUT: define void @main() !dbg !4 {
// CHECK:STDOUT: entry:
// CHECK:STDOUT: %a.var = alloca [1 x i32], align 4, !dbg !7
// CHECK:STDOUT: %b.var = alloca [2 x double], align 8, !dbg !7
// CHECK:STDOUT: %c.var = alloca [5 x {}], align 8, !dbg !7
// CHECK:STDOUT: %d.var = alloca { i32, i32, i32 }, align 8, !dbg !7
// CHECK:STDOUT: %e.var = alloca [3 x i32], align 4, !dbg !7
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(i64 4, ptr %a.var), !dbg !7
// CHECK:STDOUT: %.loc12_24.3.array.index = getelementptr inbounds [1 x i32], ptr %a.var, i32 0, i64 0, !dbg !8
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a.var, ptr align 4 @array.1.loc12_25, i64 4, i1 false), !dbg !9
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(i64 16, ptr %b.var), !dbg !7
// CHECK:STDOUT: %.loc13_32.2.array.index = getelementptr inbounds [2 x double], ptr %b.var, i32 0, i64 0, !dbg !10
// CHECK:STDOUT: %.loc13_32.4.array.index = getelementptr inbounds [2 x double], ptr %b.var, i32 0, i64 1, !dbg !10
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %b.var, ptr align 8 @array.2.loc13_33, i64 16, i1 false), !dbg !11
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(i64 0, ptr %c.var), !dbg !7
// CHECK:STDOUT: %.loc14_40.2.array.index = getelementptr inbounds [5 x {}], ptr %c.var, i32 0, i64 0, !dbg !12
// CHECK:STDOUT: %.loc14_40.4.array.index = getelementptr inbounds [5 x {}], ptr %c.var, i32 0, i64 1, !dbg !12
// CHECK:STDOUT: %.loc14_40.6.array.index = getelementptr inbounds [5 x {}], ptr %c.var, i32 0, i64 2, !dbg !12
// CHECK:STDOUT: %.loc14_40.8.array.index = getelementptr inbounds [5 x {}], ptr %c.var, i32 0, i64 3, !dbg !12
// CHECK:STDOUT: %.loc14_40.10.array.index = getelementptr inbounds [5 x {}], ptr %c.var, i32 0, i64 4, !dbg !12
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 1 %c.var, ptr align 1 @array.3.loc14_41, i64 0, i1 false), !dbg !13
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(i64 12, ptr %d.var), !dbg !7
// CHECK:STDOUT: %tuple.elem0.loc15.tuple.elem = getelementptr inbounds nuw { i32, i32, i32 }, ptr %d.var, i32 0, i32 0, !dbg !14
// CHECK:STDOUT: %tuple.elem1.loc15.tuple.elem = getelementptr inbounds nuw { i32, i32, i32 }, ptr %d.var, i32 0, i32 1, !dbg !14
// CHECK:STDOUT: %tuple.elem2.loc15.tuple.elem = getelementptr inbounds nuw { i32, i32, i32 }, ptr %d.var, i32 0, i32 2, !dbg !14
// CHECK:STDOUT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 %d.var, ptr align 4 @tuple.loc15_37, i64 12, i1 false), !dbg !15
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(i64 12, ptr %e.var), !dbg !7
// CHECK:STDOUT: %tuple.elem0.loc16.tuple.elem = getelementptr inbounds nuw { i32, i32, i32 }, ptr %d.var, i32 0, i32 0, !dbg !16
// CHECK:STDOUT: %.loc16_21.1 = load i32, ptr %tuple.elem0.loc16.tuple.elem, align 4, !dbg !16
// CHECK:STDOUT: %.loc16_21.2.array.index = getelementptr inbounds [3 x i32], ptr %e.var, i32 0, i64 0, !dbg !16
// CHECK:STDOUT: store i32 %.loc16_21.1, ptr %.loc16_21.2.array.index, align 4, !dbg !16
// CHECK:STDOUT: %tuple.elem1.loc16.tuple.elem = getelementptr inbounds nuw { i32, i32, i32 }, ptr %d.var, i32 0, i32 1, !dbg !16
// CHECK:STDOUT: %.loc16_21.4 = load i32, ptr %tuple.elem1.loc16.tuple.elem, align 4, !dbg !16
// CHECK:STDOUT: %.loc16_21.5.array.index = getelementptr inbounds [3 x i32], ptr %e.var, i32 0, i64 1, !dbg !16
// CHECK:STDOUT: store i32 %.loc16_21.4, ptr %.loc16_21.5.array.index, align 4, !dbg !16
// CHECK:STDOUT: %tuple.elem2.loc16.tuple.elem = getelementptr inbounds nuw { i32, i32, i32 }, ptr %d.var, i32 0, i32 2, !dbg !16
// CHECK:STDOUT: %.loc16_21.7 = load i32, ptr %tuple.elem2.loc16.tuple.elem, align 4, !dbg !16
// CHECK:STDOUT: %.loc16_21.8.array.index = getelementptr inbounds [3 x i32], ptr %e.var, i32 0, i64 2, !dbg !16
// CHECK:STDOUT: store i32 %.loc16_21.7, ptr %.loc16_21.8.array.index, align 4, !dbg !16
// CHECK:STDOUT: ret void, !dbg !17
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0
// 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) #1
// CHECK:STDOUT:
// CHECK:STDOUT: ; uselistorder directives
// CHECK:STDOUT: uselistorder i32 1, { 0, 2, 1, 3, 4, 5, 6, 7 }
// CHECK:STDOUT: uselistorder ptr @llvm.lifetime.start.p0, { 4, 3, 2, 1, 0 }
// CHECK:STDOUT: uselistorder ptr @llvm.memcpy.p0.p0.i64, { 3, 2, 1, 0 }
// CHECK:STDOUT:
// CHECK:STDOUT: attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT: attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
// CHECK:STDOUT:
// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
// CHECK:STDOUT:
// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
// CHECK:STDOUT: !3 = !DIFile(filename: "base.carbon", directory: "")
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Run", linkageName: "main", scope: null, file: !3, line: 11, type: !5, spFlags: DISPFlagDefinition, unit: !2)
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
// CHECK:STDOUT: !6 = !{}
// CHECK:STDOUT: !7 = !DILocation(line: 12, column: 7, scope: !4)
// CHECK:STDOUT: !8 = !DILocation(line: 12, column: 21, scope: !4)
// CHECK:STDOUT: !9 = !DILocation(line: 12, column: 3, scope: !4)
// CHECK:STDOUT: !10 = !DILocation(line: 13, column: 21, scope: !4)
// CHECK:STDOUT: !11 = !DILocation(line: 13, column: 3, scope: !4)
// CHECK:STDOUT: !12 = !DILocation(line: 14, column: 20, scope: !4)
// CHECK:STDOUT: !13 = !DILocation(line: 14, column: 3, scope: !4)
// CHECK:STDOUT: !14 = !DILocation(line: 15, column: 28, scope: !4)
// CHECK:STDOUT: !15 = !DILocation(line: 15, column: 3, scope: !4)
// CHECK:STDOUT: !16 = !DILocation(line: 16, column: 21, scope: !4)
// CHECK:STDOUT: !17 = !DILocation(line: 11, column: 1, scope: !4)
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