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-rw-r--r--lib/Target/X86/X86Instr64bit.td2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Target/X86/X86Instr64bit.td b/lib/Target/X86/X86Instr64bit.td
index 4e2710b..408da43 100644
--- a/lib/Target/X86/X86Instr64bit.td
+++ b/lib/Target/X86/X86Instr64bit.td
@@ -1620,7 +1620,7 @@ def MOV64FSrm : RI<0x8B, MRMSrcMem, (outs GR64:$dst), (ins i64mem:$src),
//===----------------------------------------------------------------------===//
// TODO: Get this to fold the constant into the instruction.
-let Defs = [ESP] in
+let hasSideEffects = 1, Defs = [ESP] in
def Int_MemBarrierNoSSE64 : RI<0x09, MRM1r, (outs), (ins GR64:$zero),
"lock\n\t"
"or{q}\t{$zero, (%rsp)|(%rsp), $zero}",