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| author | Sanjoy Das <sanjoy@playingwithpointers.com> | 2017-12-04 19:21:58 +0000 |
|---|---|---|
| committer | Sanjoy Das <sanjoy@playingwithpointers.com> | 2017-12-04 19:21:58 +0000 |
| commit | aa92cae14e998670780065f92ae9ed1431d69ff1 (patch) | |
| tree | 602685dd6d055e7070d5512130067e1ae413b959 /clang/lib/Frontend/CompilerInvocation.cpp | |
| parent | feb8343281cf723081c189d3e661209490f92ac8 (diff) | |
| download | llvm-aa92cae14e998670780065f92ae9ed1431d69ff1.zip llvm-aa92cae14e998670780065f92ae9ed1431d69ff1.tar.gz llvm-aa92cae14e998670780065f92ae9ed1431d69ff1.tar.bz2 | |
[BypassSlowDivision] Improve our handling of divisions by constants
(This reapplies r314253. r314253 was reverted on r314482 because of a
correctness regression on P100, but that regression was identified to be
something else.)
Summary:
Don't bail out on constant divisors for divisions that can be narrowed without
introducing control flow . This gives us a 32 bit multiply instead of an
emulated 64 bit multiply in the generated PTX assembly.
Reviewers: jlebar
Subscribers: jholewinski, mcrosier, llvm-commits
Differential Revision: https://reviews.llvm.org/D38265
llvm-svn: 319677
Diffstat (limited to 'clang/lib/Frontend/CompilerInvocation.cpp')
0 files changed, 0 insertions, 0 deletions