47 lines
2.1 KiB
LLVM
47 lines
2.1 KiB
LLVM
; RUN: opt -passes="globalopt" < %s -o /dev/null -debug-pass-manager 2>&1 | FileCheck %s
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; RUN: opt -strip-debug -S < %s | opt -passes="globalopt" -o /dev/null -debug-pass-manager 2>&1 | FileCheck %s
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; Make sure that the call to dbg.declare does not prevent running BlockFrequency
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; and (especially) Loop Analysis.
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; Later passes (e.g. instcombine) may behave in different ways depending on if
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; LoopInfo is available or not. Therefore, letting GlobalOpt run or not run
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; LoopAnalysis depending on the presence of a dbg.declare may make the compiler
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; generate different code with and without debug info.
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; CHECK: Running pass: GlobalOptPass on [module]
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; CHECK: Running analysis: BlockFrequencyAnalysis on h
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; CHECK: Running analysis: LoopAnalysis on h
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define i16 @h(ptr %k) {
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entry:
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call void @llvm.dbg.declare(metadata ptr %k, metadata !1, metadata !DIExpression()), !dbg !22
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%call = call i16 @gaz()
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ret i16 %call
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}
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; Function Attrs: nocallback nofree nosync nounwind readnone speculatable willreturn
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
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define internal i16 @gaz() {
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entry:
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ret i16 0
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}
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attributes #0 = { nocallback nofree nosync nounwind readnone speculatable willreturn }
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!llvm.dbg.cu = !{!17}
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!llvm.module.flags = !{!0}
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!0 = !{i32 2, !"Debug Info Version", i32 3}
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!1 = !DILocalVariable(name: "k", arg: 1, scope: !2, file: !3, line: 13, type: !19)
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!2 = distinct !DISubprogram(name: "h", scope: !3, file: !3, line: 13, type: !4, scopeLine: 13, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !17, retainedNodes: !21)
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!3 = !DIFile(filename: "foo2.c", directory: "/bar")
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!4 = !DISubroutineType(types: !5)
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!5 = !{!19}
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!17 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 16", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, retainedTypes: !18, globals: !20, splitDebugInlining: false, nameTableKind: None)
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!18 = !{!19}
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!19 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed)
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!20 = !{}
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!21 = !{!1}
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!22 = !DILocation(line: 13, column: 27, scope: !2)
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