diff options
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.td | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td index 126677d407..88f3b09c8e 100644 --- a/lib/Target/X86/X86InstrInfo.td +++ b/lib/Target/X86/X86InstrInfo.td @@ -261,7 +261,9 @@ def extloadi32i16 : PatFrag<(ops node:$ptr), (i32 (extloadi16 node:$ptr))>; // ADJCALLSTACKDOWN/UP implicitly use/def ESP because they may be expanded into // a stack adjustment and the codegen must know that they may modify the stack // pointer before prolog-epilog rewriting occurs. -let Defs = [ESP], Uses = [ESP] in { +// Pessimisively assume ADJCALLSTACKDOWN / ADJCALLSTACKUP will become sub / add +// which can clobber EFLAGS. +let Defs = [ESP, EFLAGS], Uses = [ESP] in { def ADJCALLSTACKDOWN : I<0, Pseudo, (outs), (ins i32imm:$amt), "#ADJCALLSTACKDOWN", [(X86callseq_start imm:$amt)]>; def ADJCALLSTACKUP : I<0, Pseudo, (outs), (ins i32imm:$amt1, i32imm:$amt2), |