From a678c5bac11fcba796eb6f495994610095a21b54 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Thu, 12 Oct 2006 17:42:56 +0000 Subject: [PATCH] Mark ADJCALLSTACKUP/DOWN as clobbering ESP so that virtregmap will notice that it can't assume ESP is unmodified across the instrs. llvm-svn: 30905 --- lib/Target/X86/X86InstrInfo.td | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td index 11c67bff062..f7a5af20f99 100644 --- a/lib/Target/X86/X86InstrInfo.td +++ b/lib/Target/X86/X86InstrInfo.td @@ -346,11 +346,15 @@ class Ii32 o, Format f, dag ops, string asm, list pattern> // Instruction list... // +// 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. def ADJCALLSTACKDOWN : I<0, Pseudo, (ops i32imm:$amt), "#ADJCALLSTACKDOWN", - [(X86callseq_start imm:$amt)]>; + [(X86callseq_start imm:$amt)]>, Imp<[ESP],[ESP]>; def ADJCALLSTACKUP : I<0, Pseudo, (ops i32imm:$amt1, i32imm:$amt2), "#ADJCALLSTACKUP", - [(X86callseq_end imm:$amt1, imm:$amt2)]>; + [(X86callseq_end imm:$amt1, imm:$amt2)]>, + Imp<[ESP],[ESP]>; def IMPLICIT_USE : I<0, Pseudo, (ops variable_ops), "#IMPLICIT_USE", []>; def IMPLICIT_DEF : I<0, Pseudo, (ops variable_ops), "#IMPLICIT_DEF", []>; def IMPLICIT_DEF_GR8 : I<0, Pseudo, (ops GR8:$dst),