Dan Gohman cc78cdf275 Mark x86's V_SET0 and V_SETALLONES with isSimpleLoad, and teach X86's ... foldMemoryOperand how to "fold" them, by converting them into constant-pool loads. When they aren't folded, they use xorps/cmpeqd, but for example when register pressure is high, they may now be folded as memory operands, which reduces register pressure. Also, mark V_SET0 isAsCheapAsAMove so that two-address-elimination will remat it instead of copying zeros around (V_SETALLONES was already marked). llvm-svn: 60461		2008-12-03 05:21:24 +00:00
clang	PTH:	2008-12-03 01:16:39 +00:00
llvm	Mark x86's V_SET0 and V_SETALLONES with isSimpleLoad, and teach X86's	2008-12-03 05:21:24 +00:00