diff options
| author | Evan Cheng <evan.cheng@apple.com> | 2007-09-28 01:19:48 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2007-09-28 01:19:48 +0000 |
| commit | 8decf6bc18c444932697732ede7526d6e28ecf3f (patch) | |
| tree | efd24ef85e037527543f191f0f640af4c348fc15 /lib | |
| parent | 317096ab3710fda0960be58804e9f80c800340f6 (diff) | |
Pessimisively assume ADJCALLSTACKDOWN / ADJCALLSTACKUP (which becomes sub / add) clobbers EFLAGS.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42426 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -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), |