derek.holloway
7502bf64a4
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48 lines
1.8 KiB
LLVM
48 lines
1.8 KiB
LLVM
; Verify that pseudo-probe call probes on tail call is not considered dangling
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; Source:
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; int bar(int);
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; int foo_tail(int x) {
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; # entry probe
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; # direct call probe
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; return bar(x); // tail call probe is dropped
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; }
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; RUN: llc -mtriple=x86_64-unknown-unknown -stop-after=pseudo-probe-inserter %s -o - | FileCheck %s
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; CHECK-LABEL: name: foo_tail
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; CHECK: PSEUDO_PROBE 3369713592223921200, 1, 0, 0
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; CHECK-NEXT: PSEUDO_PROBE 3369713592223921200, 2, 2, 0
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; CHECK-NEXT: TAILJMPd64 {{.*}} @bar
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declare !dbg !26 i32 @bar(i32 noundef) local_unnamed_addr
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define dso_local i32 @foo_tail(i32 noundef %x) local_unnamed_addr !dbg !15 {
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entry:
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call void @llvm.pseudoprobe(i64 3369713592223921200, i64 1, i32 0, i64 -1), !dbg !22
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%call = tail call i32 @bar(i32 noundef %x), !dbg !23
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ret i32 %call, !dbg !25
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}
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declare void @llvm.pseudoprobe(i64, i64, i32, i64)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3}
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!llvm.pseudo_probe_desc = !{!14}
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!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, isOptimized: true, emissionKind: FullDebug)
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!1 = !DIFile(filename: "tail.c", directory: "/tmp")
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!2 = !{i32 7, !"Dwarf Version", i32 5}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!14 = !{i64 3369713592223921200, i64 281479271677951, !"foo_tail"}
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!15 = distinct !DISubprogram(name: "foo_tail", scope: !1, file: !1, line: 3, type: !16, scopeLine: 3, spFlags: DISPFlagDefinition, unit: !0)
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!16 = !DISubroutineType(types: !17)
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!17 = !{!18, !18}
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!18 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!22 = !DILocation(line: 4, column: 16, scope: !15)
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!23 = !DILocation(line: 4, column: 12, scope: !24)
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!24 = !DILexicalBlockFile(scope: !15, file: !1, discriminator: 455082007)
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!25 = !DILocation(line: 4, column: 5, scope: !15)
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!26 = !DISubprogram(name: "bar", scope: !1, file: !1, line: 1, type: !16, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized)
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