diff options
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/X86/X86Instr64bit.td | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86Instr64bit.td b/llvm/lib/Target/X86/X86Instr64bit.td index ef19823a283..f7d5ef275fe 100644 --- a/llvm/lib/Target/X86/X86Instr64bit.td +++ b/llvm/lib/Target/X86/X86Instr64bit.td @@ -1515,6 +1515,7 @@ def XCHG64rm : RI<0x87, MRMSrcMem, (outs GR64:$dst), (ins i64mem:$ptr,GR64:$val) } // Optimized codegen when the non-memory output is not used. +let Defs = [EFLAGS] in { // FIXME: Use normal add / sub instructions and add lock prefix dynamically. def LOCK_ADD64mr : RI<0x03, MRMDestMem, (outs), (ins i64mem:$dst, GR64:$src2), "lock\n\t" @@ -1544,7 +1545,7 @@ def LOCK_INC64m : RI<0xFF, MRM0m, (outs), (ins i64mem:$dst), def LOCK_DEC64m : RI<0xFF, MRM1m, (outs), (ins i64mem:$dst), "lock\n\t" "dec{q}\t$dst", []>, LOCK; - +} // Atomic exchange, and, or, xor let Constraints = "$val = $dst", Defs = [EFLAGS], usesCustomDAGSchedInserter = 1 in { |
