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| author | Sanjay Patel <spatel@rotateright.com> | 2018-11-05 17:26:42 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2018-11-05 17:26:42 +0000 |
| commit | c26fd1e77258d2a1ebeff25638636291ac64671a (patch) | |
| tree | a83e71fd2c85d27a7e54095d1922ca8e8f08b944 /lldb/packages/Python/lldbsuite/test/lldbtest.py | |
| parent | c50240dac133451b3eae5b89cecca4c1c4af9fd4 (diff) | |
| download | llvm-c26fd1e77258d2a1ebeff25638636291ac64671a.zip llvm-c26fd1e77258d2a1ebeff25638636291ac64671a.tar.gz llvm-c26fd1e77258d2a1ebeff25638636291ac64671a.tar.bz2 | |
[InstCombine] canonicalize -0.0 to +0.0 in fcmp
As stated in IEEE-754 and discussed in:
https://bugs.llvm.org/show_bug.cgi?id=38086
...the sign of zero does not affect any FP compare predicate.
Known regressions were fixed with:
rL346097 (D54001)
rL346143
The transform will help reduce pattern-matching complexity to solve:
https://bugs.llvm.org/show_bug.cgi?id=39475
...as well as improve CSE and codegen (a zero constant is almost always
easier to produce than 0x80..00).
llvm-svn: 346147
Diffstat (limited to 'lldb/packages/Python/lldbsuite/test/lldbtest.py')
0 files changed, 0 insertions, 0 deletions