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-rw-r--r--llvm/lib/Target/X86/X86JITInfo.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86JITInfo.cpp b/llvm/lib/Target/X86/X86JITInfo.cpp
index cca391f647a..0a4accee990 100644
--- a/llvm/lib/Target/X86/X86JITInfo.cpp
+++ b/llvm/lib/Target/X86/X86JITInfo.cpp
@@ -351,6 +351,9 @@ static
void LLVM_ATTRIBUTE_USED
X86CompilationCallback2(intptr_t *StackPtr, intptr_t RetAddr) {
intptr_t *RetAddrLoc = &StackPtr[1];
+ // We are reading raw stack data here. Tell MemorySanitizer that it is
+ // sufficiently initialized.
+ __msan_unpoison(RetAddrLoc, sizeof(*RetAddrLoc));
assert(*RetAddrLoc == RetAddr &&
"Could not find return address on the stack!");
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