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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
This commit is contained in:
Chris Lattner 2006-10-12 17:42:56 +00:00
parent df2ccc395e
commit b5cda3daa9
1 changed files with 6 additions and 2 deletions
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8
llvm/lib/Target/X86/X86InstrInfo.td
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@ -346,11 +346,15 @@ class Ii32<bits<8> o, Format f, dag ops, string asm, list<dag> 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),