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| author | Shuxin Yang <shuxin.llvm@gmail.com> | 2012-10-31 23:11:48 +0000 |
|---|---|---|
| committer | Shuxin Yang <shuxin.llvm@gmail.com> | 2012-10-31 23:11:48 +0000 |
| commit | a5526a9bffbd62a14d576f583c206a8a781cc2f1 (patch) | |
| tree | e58a6a7c0baec3b6f947d8df16933e36fdc374ac /tools/llvm-mcmarkup | |
| parent | e57b2cbce652d45ed5516e52ad82991bfa03cfd7 (diff) | |
| download | llvm-a5526a9bffbd62a14d576f583c206a8a781cc2f1.tar.gz llvm-a5526a9bffbd62a14d576f583c206a8a781cc2f1.tar.bz2 llvm-a5526a9bffbd62a14d576f583c206a8a781cc2f1.tar.xz | |
(For X86) Enhancement to add-carray/sub-borrow (adc/sbb) optimization.
The adc/sbb optimization is to able to convert following expression
into a single adc/sbb instruction:
(ult) ... = x + 1 // where the ult is unsigned-less-than comparison
(ult) ... = x - 1
This change is to flip the "x >u y" (i.e. ugt comparison) in order
to expose the adc/sbb opportunity.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167180 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/llvm-mcmarkup')
0 files changed, 0 insertions, 0 deletions