From 8decf6bc18c444932697732ede7526d6e28ecf3f Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Fri, 28 Sep 2007 01:19:48 +0000 Subject: [PATCH] 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 --- lib/Target/X86/X86InstrInfo.td | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td index 126677d4074..88f3b09c8e5 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),