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Some nice peephole patterns. Based on patch by Brian Lucas! 

llvm-svn: 86469
This commit is contained in:
Anton Korobeynikov 2009-11-08 15:32:28 +00:00
parent fd9a893cab
commit a404d61c8e
1 changed files with 7 additions and 0 deletions
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7
llvm/lib/Target/MSP430/MSP430InstrInfo.td
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@ -690,6 +690,10 @@ def SEXT16r : Pseudo<(outs GR16:$dst), (ins GR16:$src),
} // Defs = [SRW]
def ZEXT16r : Pseudo<(outs GR16:$dst), (ins GR16:$src),
"mov.b\t{$src, $dst}",
[(set GR16:$dst, (zext (trunc GR16:$src)))]>;
def SWPB16r : Pseudo<(outs GR16:$dst), (ins GR16:$src),
"swpb\t$dst",
[(set GR16:$dst, (bswap GR16:$src))]>;
@ -899,3 +903,6 @@ def : Pat<(store (subc (load addr:$dst), GR8:$src), addr:$dst),
(SUB8mr addr:$dst, GR8:$src)>;
def : Pat<(store (subc (load addr:$dst), (i8 (load addr:$src))), addr:$dst),
(SUB8mm addr:$dst, addr:$src)>;
// peephole patterns
def : Pat<(and GR16:$src, 255), (ZEXT16r GR16:$src)>;