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4 Commits

Author SHA1 Message Date
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
Nadav Rotem
a46c75d9a7 On Haswell, perfer storing YMM registers using a single instruction. 
llvm-svn: 157129
 2012-05-19 20:30:08 +00:00