mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 21:10:12 +01:00
Richard Smith
b7f11e4c61
Use the Carbon-computed alignment for allocas, loads, stores, and memcpys. Previously we used whatever LLVM felt like giving us, which would result in ABI mismatches and runtime crashes due to misalignment when creating objects of imported C++ class types, as well as resulting in some surprising choices like `(i32, i32)` and `()` having 8-byte alignment instead of 4 and 1, respectively.
60 lines
3.2 KiB
Plaintext
60 lines
3.2 KiB
Plaintext
// 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/tuple/value_forwarding.carbon
|
|
// TIP: To dump output, run:
|
|
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/tuple/value_forwarding.carbon
|
|
|
|
fn G(ab: ((i32, i32, i32), (i32, i32, i32)));
|
|
|
|
fn F(a: (i32, i32, i32), b: (i32, i32, i32)) {
|
|
G((a, b));
|
|
}
|
|
|
|
// CHECK:STDOUT: ; ModuleID = 'value_forwarding.carbon'
|
|
// CHECK:STDOUT: source_filename = "value_forwarding.carbon"
|
|
// CHECK:STDOUT:
|
|
// CHECK:STDOUT: declare void @_CG.Main(ptr)
|
|
// CHECK:STDOUT:
|
|
// CHECK:STDOUT: ; Function Attrs: nounwind
|
|
// CHECK:STDOUT: define void @_CF.Main(ptr %a, ptr %b) #0 !dbg !4 {
|
|
// CHECK:STDOUT: entry:
|
|
// CHECK:STDOUT: %tuple = alloca { ptr, ptr }, align 8, !dbg !11
|
|
// CHECK:STDOUT: call void @llvm.lifetime.start.p0(ptr %tuple), !dbg !11
|
|
// CHECK:STDOUT: %tuple1 = getelementptr inbounds nuw { ptr, ptr }, ptr %tuple, i32 0, i32 0, !dbg !11
|
|
// CHECK:STDOUT: store ptr %a, ptr %tuple1, align 8, !dbg !11
|
|
// CHECK:STDOUT: %tuple2 = getelementptr inbounds nuw { ptr, ptr }, ptr %tuple, i32 0, i32 1, !dbg !11
|
|
// CHECK:STDOUT: store ptr %b, ptr %tuple2, align 8, !dbg !11
|
|
// CHECK:STDOUT: call void @_CG.Main(ptr %tuple), !dbg !12
|
|
// CHECK:STDOUT: ret void, !dbg !13
|
|
// CHECK:STDOUT: }
|
|
// CHECK:STDOUT:
|
|
// CHECK:STDOUT: ; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
|
|
// CHECK:STDOUT: declare void @llvm.lifetime.start.p0(ptr captures(none)) #1
|
|
// CHECK:STDOUT:
|
|
// CHECK:STDOUT: attributes #0 = { nounwind }
|
|
// CHECK:STDOUT: attributes #1 = { nocallback nofree nosync 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_plus_plus, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
|
|
// CHECK:STDOUT: !3 = !DIFile(filename: "value_forwarding.carbon", directory: "")
|
|
// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "F", linkageName: "_CF.Main", scope: null, file: !3, line: 15, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8)
|
|
// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
|
|
// CHECK:STDOUT: !6 = !{null, !7, !7}
|
|
// CHECK:STDOUT: !7 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
|
|
// CHECK:STDOUT: !8 = !{!9, !10}
|
|
// CHECK:STDOUT: !9 = !DILocalVariable(arg: 1, scope: !4, type: !7)
|
|
// CHECK:STDOUT: !10 = !DILocalVariable(arg: 2, scope: !4, type: !7)
|
|
// CHECK:STDOUT: !11 = !DILocation(line: 16, column: 5, scope: !4)
|
|
// CHECK:STDOUT: !12 = !DILocation(line: 16, column: 3, scope: !4)
|
|
// CHECK:STDOUT: !13 = !DILocation(line: 15, column: 1, scope: !4)
|