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-rw-r--r--llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp b/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp
index 683d6949094..454664e3ed1 100644
--- a/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp
+++ b/llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp
@@ -1526,6 +1526,9 @@ MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
assert(Op->isToken() && "Leading operand should always be a mnemonic!");
ArrayRef<SMRange> EmptyRanges = ArrayRef<SMRange>();
+ // Clear the opcode.
+ Opcode = ~0x0;
+
// First, handle aliases that expand to multiple instructions.
// FIXME: This should be replaced with a real .td file alias mechanism.
// Also, MatchInstructionImpl should actually *do* the EmitInstruction
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