62 lines
3.3 KiB
LLVM
62 lines
3.3 KiB
LLVM
; RUN: mkdir -p %t && cd %t
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; RUN: opt < %s -passes=insert-gcov-profiling -S | FileCheck %s
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; CHECK: @__llvm_gcov_ctr = internal global [1 x i64] zeroinitializer
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;; If an indirectbr critical edge cannot be split, ignore it.
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;; The edge will not be profiled.
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; CHECK-LABEL: @cannot_split(
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; CHECK: indirect.preheader:
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; CHECK-NEXT: load {{.*}} @__llvm_gcov_ctr
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; CHECK-NOT: load {{.*}} @__llvm_gcov_ctr
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define dso_local i32 @cannot_split(i8* nocapture readonly %p) #0 !dbg !7 {
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entry:
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%targets = alloca <2 x i8*>, align 16
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store <2 x i8*> <i8* blockaddress(@cannot_split, %indirect), i8* blockaddress(@cannot_split, %end)>, <2 x i8*>* %targets, align 16, !dbg !9
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br label %for.cond, !dbg !14
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for.cond: ; preds = %for.cond, %entry
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%p.addr.0 = phi i8* [ %p, %entry ], [ %incdec.ptr, %for.cond ]
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%0 = load i8, i8* %p.addr.0, align 1, !dbg !15
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%cmp = icmp eq i8 %0, 7, !dbg !17
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%incdec.ptr = getelementptr inbounds i8, i8* %p.addr.0, i64 1, !dbg !18
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br i1 %cmp, label %indirect.preheader, label %for.cond, !dbg !15, !llvm.loop !19
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indirect.preheader: ; preds = %for.cond
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%1 = load i8, i8* %incdec.ptr, align 1, !dbg !21
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%idxprom = sext i8 %1 to i64, !dbg !21
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%arrayidx4 = getelementptr inbounds <2 x i8*>, <2 x i8*>* %targets, i64 0, i64 %idxprom, !dbg !21
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%2 = load i8*, i8** %arrayidx4, align 8, !dbg !21
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br label %indirect
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indirect: ; preds = %indirect.preheader, %indirect
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indirectbr i8* %2, [label %indirect, label %end]
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end: ; preds = %indirect
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ret i32 0, !dbg !22
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}
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attributes #0 = { norecurse nounwind readonly uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "a.c", directory: "/tmp/c")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!7 = distinct !DISubprogram(name: "cannot_split", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!8 = !DISubroutineType(types: !2)
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!9 = !DILocation(line: 3, column: 14, scope: !7)
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!14 = !DILocation(line: 5, column: 3, scope: !7)
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!15 = !DILocation(line: 6, column: 9, scope: !7)
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!17 = !DILocation(line: 6, column: 12, scope: !7)
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!18 = !DILocation(line: 5, column: 12, scope: !7)
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!19 = distinct !{!19, !14, !20}
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!20 = !DILocation(line: 9, column: 5, scope: !7)
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!21 = !DILocation(line: 0, scope: !7)
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!22 = !DILocation(line: 11, column: 3, scope: !7)
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