7 Commits

Author	SHA1	Message	Date
NAKAMURA Takumi	44d438eb55	llvm/test/CodeGen/X86/fold-pcmpeqd-1.ll: Make sure this is testing without +avx. ... FIXME: Could +avx be checked here too? llvm-svn: 161156	2012-08-02 06:36:56 +00:00
NAKAMURA Takumi	d591c838db	llvm/test/CodeGen/X86/fold-pcmpeqd-1.ll: Rewrite expressions to pass regardless of PR11031. ... - Relax to match even if epilogue (pop %ebp) were emitted. - Assume the return value is stored to %xmm0. llvm-svn: 161155	2012-08-02 06:33:58 +00:00
Manman Ren	78b8d454cc	X86 Peephole: fold loads to the source register operand if possible. ... Machine CSE and other optimizations can remove instructions so folding is possible at peephole while not possible at ISel. This patch is a rework of r160919 and was tested on clang self-host on my local machine. rdar://10554090 and rdar://11873276 llvm-svn: 161152	2012-08-02 00:56:42 +00:00
Manman Ren	ceef7c4d9b	Revert r160920 and r160919 due to dragonegg and clang selfhost failure ... llvm-svn: 160927	2012-07-29 02:44:09 +00:00
Manman Ren	ea77f9076b	X86 Peephole: fold loads to the source register operand if possible. ... Machine CSE and other optimizations can remove instructions so folding is possible at peephole while not possible at ISel. rdar://10554090 and rdar://11873276 llvm-svn: 160919	2012-07-28 16:48:01 +00:00
Dan Gohman	df2896d609	Eliminate more uses of llvm-as and llvm-dis. ... llvm-svn: 81290	2009-09-08 23:54:48 +00:00
Dan Gohman	ac6561793c	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