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).
101 lines
4.2 KiB
LLVM
101 lines
4.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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declare void @llvm.dbg.declare(metadata, metadata, metadata)
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declare void @llvm.lifetime.start.p0(ptr nocapture)
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declare void @llvm.lifetime.end.p0(ptr nocapture)
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declare void @foo(ptr nocapture, ptr nocapture)
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define void @bar(i1 %flag) #0 !dbg !4 {
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; CHECK-LABEL: @bar(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TEXT:%.*]] = alloca [1 x i8], align 1
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; CHECK-NEXT: [[BUFF:%.*]] = alloca [1 x i8], align 1
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; CHECK-NEXT: br i1 [[FLAG:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: if:
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; CHECK-NEXT: br label [[BB2:%.*]]
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; CHECK: bb2:
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; CHECK-NEXT: br label [[BB3:%.*]]
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; CHECK: bb3:
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; CHECK-NEXT: #dbg_declare(ptr [[TEXT]], [[META16:![0-9]+]], !DIExpression(), [[META24:![0-9]+]])
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; CHECK-NEXT: br label [[FIN:%.*]]
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; CHECK: else:
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[TEXT]])
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; CHECK-NEXT: call void @llvm.lifetime.start.p0(ptr nonnull [[BUFF]])
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; CHECK-NEXT: call void @foo(ptr nonnull [[BUFF]], ptr nonnull [[TEXT]])
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[BUFF]])
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; CHECK-NEXT: call void @llvm.lifetime.end.p0(ptr nonnull [[TEXT]])
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; CHECK-NEXT: br label [[FIN]]
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; CHECK: fin:
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; CHECK-NEXT: ret void
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;
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entry:
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%text = alloca [1 x i8], align 1
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%buff = alloca [1 x i8], align 1
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br i1 %flag, label %if, label %else
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if:
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call void @llvm.lifetime.start.p0(ptr %text)
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call void @llvm.lifetime.start.p0(ptr %buff)
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call void @llvm.lifetime.end.p0(ptr %buff)
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call void @llvm.lifetime.end.p0(ptr %text)
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br label %bb2
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bb2:
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call void @llvm.lifetime.start.p0(ptr %text)
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call void @llvm.lifetime.start.p0(ptr %buff)
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call void @llvm.lifetime.end.p0(ptr %text)
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call void @llvm.lifetime.end.p0(ptr %buff)
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br label %bb3
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bb3:
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call void @llvm.lifetime.start.p0(ptr %text)
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call void @llvm.dbg.declare(metadata ptr %text, metadata !14, metadata !25), !dbg !26
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call void @llvm.lifetime.end.p0(ptr %text)
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br label %fin
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else:
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call void @llvm.lifetime.start.p0(ptr %text)
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call void @llvm.lifetime.start.p0(ptr %buff)
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call void @foo(ptr %buff, ptr %text)
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call void @llvm.lifetime.end.p0(ptr %buff)
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call void @llvm.lifetime.end.p0(ptr %text)
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br label %fin
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fin:
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ret void
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}
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attributes #0 = { null_pointer_is_valid }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!22, !23}
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!llvm.ident = !{!24}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 248826) (llvm/trunk 248827)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "test.cpp", directory: "/home/user")
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!2 = !{}
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!4 = distinct !DISubprogram(name: "bar", linkageName: "bar", scope: !1, file: !1, line: 2, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null, !7}
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!7 = !DIBasicType(name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean)
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!8 = !{!9, !11, !12, !14, !21}
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!9 = !DILocalVariable(name: "Size", arg: 1, scope: !4, file: !1, line: 2, type: !10)
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!10 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!11 = !DILocalVariable(name: "flag", arg: 2, scope: !4, file: !1, line: 2, type: !7)
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!12 = !DILocalVariable(name: "i", scope: !13, file: !1, line: 3, type: !10)
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!13 = distinct !DILexicalBlock(scope: !4, file: !1, line: 3, column: 3)
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!14 = !DILocalVariable(name: "text", scope: !15, file: !1, line: 4, type: !17)
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!15 = distinct !DILexicalBlock(scope: !16, file: !1, line: 3, column: 30)
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!16 = distinct !DILexicalBlock(scope: !13, file: !1, line: 3, column: 3)
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!17 = !DICompositeType(tag: DW_TAG_array_type, baseType: !18, size: 8, align: 8, elements: !19)
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!18 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!19 = !{!20}
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!20 = !DISubrange(count: 1)
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!21 = !DILocalVariable(name: "buff", scope: !15, file: !1, line: 5, type: !17)
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!22 = !{i32 2, !"Dwarf Version", i32 4}
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!23 = !{i32 2, !"Debug Info Version", i32 3}
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!24 = !{!"clang version 3.8.0 (trunk 248826) (llvm/trunk 248827)"}
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!25 = !DIExpression()
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!26 = !DILocation(line: 4, column: 10, scope: !15)
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