forked from OSchip/llvm-project
46 lines
2.0 KiB
LLVM
46 lines
2.0 KiB
LLVM
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; RUN: opt -instcombine-lower-dbg-declare=0 < %s -instcombine -S | FileCheck %s
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; RUN: opt -instcombine-lower-dbg-declare=1 < %s -instcombine -S | FileCheck %s
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define i32 @foo(i32 %j) #0 !dbg !7 {
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entry:
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%j.addr = alloca i32, align 4
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store i32 %j, i32* %j.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %j.addr, metadata !11, metadata !12), !dbg !13
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call void @llvm.dbg.value(metadata i32 10, metadata !16, metadata !12), !dbg !15
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%0 = load i32, i32* %j.addr, align 4, !dbg !14
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ret i32 %0, !dbg !15
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}
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; Instcombine can remove the alloca and forward the load to store, but it
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; should convert the declare to dbg value.
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; CHECK-LABEL: define i32 @foo(i32 %j)
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; CHECK-NOT: alloca
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; CHECK: call void @llvm.dbg.value(metadata i32 %j, {{.*}})
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; CHECK: call void @llvm.dbg.value(metadata i32 10, {{.*}})
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; CHECK: ret i32 %j
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang 5.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "a.c", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"PIC Level", i32 2}
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!6 = !{!"clang version 5.0.0 (trunk 302918) (llvm/trunk 302925)"}
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!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !DILocalVariable(name: "j", arg: 1, scope: !7, file: !1, line: 2, type: !10)
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!12 = !DIExpression()
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!13 = !DILocation(line: 2, column: 13, scope: !7)
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!14 = !DILocation(line: 5, column: 10, scope: !7)
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!15 = !DILocation(line: 5, column: 3, scope: !7)
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!16 = !DILocalVariable(name: "h", scope: !7, file: !1, line: 4, type: !10)
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