693a1b7024
This patch adds nosantize metadata to memory access instructions inserted by gcov emitProfileNotes(), making sanitizers skip these instructions when gcov and sanitizer are used together. Reviewed By: nickdesaulniers Differential Revision: https://reviews.llvm.org/D150460
35 lines
1.6 KiB
LLVM
35 lines
1.6 KiB
LLVM
;; Ensure that the loads, stores, and atomicrmw adds for gcov have nosanitize metadata.
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; RUN: rm -rf %t && mkdir %t && cd %t
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; RUN: opt < %s -S -passes=insert-gcov-profiling | FileCheck %s
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; RUN: opt < %s -S -passes=insert-gcov-profiling -gcov-atomic-counter | FileCheck %s --check-prefixes=CHECK-ATOMIC-COUNTER
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; CHECK-LABEL: void @empty()
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; CHECK-NEXT: entry:
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; CHECK-NEXT: %gcov_ctr = load i64, ptr @__llvm_gcov_ctr, align 4, !dbg [[DBG:![0-9]+]], !nosanitize [[NOSANITIZE:![0-9]+]]
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; CHECK-NEXT: %0 = add i64 %gcov_ctr, 1, !dbg [[DBG]]
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; CHECK-NEXT: store i64 %0, ptr @__llvm_gcov_ctr, align 4, !dbg [[DBG]], !nosanitize [[NOSANITIZE]]
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; CHECK-NEXT: ret void, !dbg [[DBG]]
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; CHECK-ATOMIC-COUNTER-LABEL: void @empty()
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; CHECK-ATOMIC-COUNTER-NEXT: entry:
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; CHECK-ATOMIC-COUNTER-NEXT: %0 = atomicrmw add ptr @__llvm_gcov_ctr, i64 1 monotonic, align 8, !dbg [[DBG:![0-9]+]], !nosanitize [[NOSANITIZE:![0-9]+]]
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; CHECK-ATOMIC-COUNTER-NEXT: ret void, !dbg [[DBG]]
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define dso_local void @empty() !dbg !5 {
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entry:
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ret void, !dbg !8
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "a.c", directory: "")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 5}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = distinct !DISubprogram(name: "empty", scope: !1, file: !1, line: 1, type: !6, scopeLine: 1, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
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!6 = !DISubroutineType(types: !7)
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!7 = !{null}
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!8 = !DILocation(line: 2, column: 1, scope: !5)
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