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Author SHA1 Message Date
Manman Ren 5759d01230 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 f87dd7c01b Revert r160920 and r160919 due to dragonegg and clang selfhost failure 
llvm-svn: 160927
 2012-07-29 02:44:09 +00:00
Manman Ren 0fa3ab88ba 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
Nadav Rotem c93e91da27 On Haswell, perfer storing YMM registers using a single instruction. 
llvm-svn: 157129
 2012-05-19 20:30:08 +00:00