adbbb93d3d
Move the search for the appropriate AND instruction
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into OptimizeCompareInstr.
This necessitates the passing of CmpValue around,
so widen the virtual functions to accomodate.
No functionality changes.
llvm-svn: 114428
2010-09-21 12:01:15 +00:00
f08b36d386
must not peephole away side effects
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llvm-svn: 113848
2010-09-14 20:46:08 +00:00
27dddd1fd1
Rename ConvertToSetZeroFlag to something more general.
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llvm-svn: 113670
2010-09-11 00:13:50 +00:00
d0a5f4e238
No need to recompute the SrcReg and CmpValue.
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llvm-svn: 113666
2010-09-10 23:46:12 +00:00
041230014c
Move some of the decision logic for converting an instruction into one that sets
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the 'zero' bit down into the back-end. There are other cases where this logic
isn't sufficient, so they should be handled separately.
llvm-svn: 113665
2010-09-10 23:34:19 +00:00
aee679bf35
Modify the comparison optimizations in the peephole optimizer to update the
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iterator when an optimization took place. This allows us to do more insane
things with the code than just remove an instruction or two.
llvm-svn: 113640
2010-09-10 21:55:43 +00:00
6628431a91
Remove now unneeded command line flag that enables 'optimize compares.'
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llvm-svn: 112287
2010-08-27 20:39:09 +00:00
0757820f8f
Turn optimize compares back on with fix. We needed to test that a machine op was
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a register before checking if it was defined.
llvm-svn: 110733
2010-08-10 21:38:11 +00:00
a53f4e23e4
Revert r110718; it broke clang-i386-darwin9.
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llvm-svn: 110726
2010-08-10 20:49:33 +00:00
558f822bc7
Turn optimize cmps on by default so that we can get some testing by the nightly
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ARM testers.
llvm-svn: 110718
2010-08-10 20:23:02 +00:00
ca67835eaa
Merge the OptimizeExts and OptimizeCmps passes into one PeepholeOptimizer
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pass. This pass should expand with all of the small, fine-grained optimization
passes to reduce compile time and increase happiment.
llvm-svn: 110627
2010-08-09 23:59:04 +00:00
Gabor Greif