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* Relax expressions and add explicit triplets -linux and -win32.NAKAMURA Takumi2011-02-221-7/+8
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126212 91177308-0d34-0410-b5e6-96231b3b80d8
* Re-implement the main strength-reduction portion of LoopStrengthReduction.Dan Gohman2010-01-211-3/+23
| | | | | | | | | | | | | | | This new version is much more aggressive about doing "full" reduction in cases where it reduces register pressure, and also more aggressive about rewriting induction variables to count down (or up) to zero when doing so reduces register pressure. It currently uses fairly simplistic algorithms for finding reuse opportunities, but it introduces a new framework allows it to combine multiple strategies at once to form hybrid solutions, instead of doing all full-reduction or all base+index. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94061 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply the MOV64r0 patch, with a fix: MOV64r0 clobbers EFLAGS.Dan Gohman2010-01-121-1/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93229 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert 93158. It's breaking quite a few x86_64 tests.Evan Cheng2010-01-111-0/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93185 91177308-0d34-0410-b5e6-96231b3b80d8
* Re-instate MOV64r0 and MOV16r0, with adjustments to work with theDan Gohman2010-01-111-0/+13
new AsmPrinter. This is perhaps less elegant than describing them in terms of MOV32r0 and subreg operations, but it allows the current register to rematerialize them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93158 91177308-0d34-0410-b5e6-96231b3b80d8
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