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really remove the instruction, don't just comment it out

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llvm-svn: 91976
This commit is contained in:
Chris Lattner 2009-12-23 01:46:40 +00:00
parent d7e8bd73fe
commit f77ca5f9f5
1 changed files with 4 additions and 7 deletions
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11
lib/Target/X86/X86InstrInfo.td
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@ -3701,16 +3701,13 @@ def MOV8r0 : I<0x30, MRMInitReg, (outs GR8 :$dst), (ins),
"xor{b}\t$dst, $dst",
[(set GR8:$dst, 0)]>;
def MOV32r0 : I<0x31, MRMInitReg, (outs GR32:$dst), (ins),
"xor{l}\t$dst, $dst",
[(set GR32:$dst, 0)]>;
def MOV32r0 : I<0x31, MRMInitReg, (outs GR32:$dst), (ins),
"xor{l}\t$dst, $dst",
[(set GR32:$dst, 0)]>;
}
// Use xorl instead of xorw since we don't care about the high 16 bits,
// it's smaller, and it avoids a partial-register update.
//def MOV16r0 : I<0x31, MRMInitReg, (outs GR16:$dst), (ins),
// "", [/*(set GR16:$dst, 0)*/]>;
}
let AddedComplexity = 1 in
def : Pat<(i16 0),
(EXTRACT_SUBREG (MOV32r0), x86_subreg_16bit)>;