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--- llvm/lib/Target/X86/X86InstrSystem.td.orig
+++ llvm/lib/Target/X86/X86InstrSystem.td
@@ -585,7 +585,7 @@
//===----------------------------------------------------------------------===//
// VIA PadLock crypto instructions
let Defs = [RAX, RDI], Uses = [RDX, RDI], SchedRW = [WriteSystem] in
- def XSTORE : I<0xa7, MRM_C0, (outs), (ins), "xstore", []>, TB, REP;
+ def XSTORE : I<0xa7, MRM_C0, (outs), (ins), "xstore", []>, TB;
def : InstAlias<"xstorerng", (XSTORE)>;
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