c23b4fbdbb
Now that #149310 has restricted lifetime intrinsics to only work on allocas, we can also drop the explicit size argument. Instead, the size is implied by the alloca. This removes the ability to only mark a prefix of an alloca alive/dead. We never used that capability, so we should remove the need to handle that possibility everywhere (though many key places, including stack coloring, did not actually respect this).
65 lines
2.8 KiB
LLVM
65 lines
2.8 KiB
LLVM
; RUN: opt -passes=instcombine -S %s | FileCheck %s
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define dso_local void @_Z1fv() {
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%1 = alloca i32, align 4
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call void @llvm.lifetime.start.p0(ptr nonnull %1)
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call void @llvm.dbg.declare(metadata ptr %1, metadata !16, metadata !DIExpression()), !dbg !19
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; CHECK: %[[A:.*]] = alloca i32, align 4
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; CHECK: #dbg_value(ptr %[[A]], {{.*}}, !DIExpression(DW_OP_deref)
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; CHECK: call void @_Z1gPv
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call void @_Z1gPv(ptr nonnull %1)
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; CHECK-NOT: #dbg_value
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; CHECK: call void @_Z1gPv
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call void @_Z1gPv(ptr nonnull %1)
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call void @llvm.lifetime.end.p0(ptr nonnull %1)
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ret void, !dbg !21
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}
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define dso_local void @_Z2fv() {
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%1 = alloca i32, align 4
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call void @llvm.lifetime.start.p0(ptr nonnull %1)
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call void @llvm.dbg.declare(metadata ptr %1, metadata !16, metadata !DIExpression()), !dbg !19
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; CHECK: %[[A:.*]] = alloca i32, align 4
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; CHECK: #dbg_value(ptr %[[A]], {{.*}}, !DIExpression(DW_OP_deref)
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; CHECK: call void @_Z1gPv
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call void @_Z1gPv(ptr nonnull %1)
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br label %block2
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block2:
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; CHECK: #dbg_value(ptr %[[A]], {{.*}}, !DIExpression(DW_OP_deref)
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; CHECK: call void @_Z1gPv
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call void @_Z1gPv(ptr nonnull %1)
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call void @llvm.lifetime.end.p0(ptr nonnull %1)
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ret void, !dbg !21
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}
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declare void @llvm.lifetime.start.p0(ptr nocapture)
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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declare dso_local void @_Z1gPv(ptr)
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declare void @llvm.lifetime.end.p0(ptr nocapture)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!8, !9, !10}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0 (git@github.com:llvm/llvm-project.git cab64b5708f614c71d275ec9d134e68b8c3baedd)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
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!1 = !DIFile(filename: "dbg.cc", directory: "/tmp")
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!2 = !{}
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!3 = !{!4, !5}
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!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
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!5 = !DISubprogram(name: "g", linkageName: "_Z1gPv", scope: !1, file: !1, line: 1, type: !6, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!6 = !DISubroutineType(types: !7)
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!7 = !{null, !4}
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!8 = !{i32 7, !"Dwarf Version", i32 4}
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!9 = !{i32 2, !"Debug Info Version", i32 3}
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!10 = !{i32 1, !"wchar_size", i32 4}
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!12 = distinct !DISubprogram(name: "f", linkageName: "_Z1fv", scope: !1, file: !1, line: 2, type: !13, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15)
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!13 = !DISubroutineType(types: !14)
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!14 = !{null}
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!15 = !{!16}
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!16 = !DILocalVariable(name: "x", scope: !12, file: !1, line: 3, type: !17)
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!17 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!18 = !DILocation(line: 3, column: 3, scope: !12)
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!19 = !DILocation(line: 3, column: 7, scope: !12)
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!20 = !DILocation(line: 4, column: 3, scope: !12)
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!21 = !DILocation(line: 5, column: 1, scope: !12)
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