diff options
| author | Sanjay Patel <spatel@rotateright.com> | 2017-12-06 21:22:57 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2017-12-06 21:22:57 +0000 |
| commit | b6404a8ca6e7d3a77894f3dcfdad89cda1eb6042 (patch) | |
| tree | 9c24ea0afd42a259eed25375b6508b3c30683151 /llvm/lib/ProfileData/Coverage/CoverageMapping.cpp | |
| parent | e363d2cebbc1b880059a372d69f6ddee587f9d2d (diff) | |
| download | llvm-b6404a8ca6e7d3a77894f3dcfdad89cda1eb6042.zip llvm-b6404a8ca6e7d3a77894f3dcfdad89cda1eb6042.tar.gz llvm-b6404a8ca6e7d3a77894f3dcfdad89cda1eb6042.tar.bz2 | |
[InstCombine] canonicalize constant-minus-boolean to select-of-constants
This restores the half of:
https://reviews.llvm.org/rL75531
that was reverted at:
https://reviews.llvm.org/rL159230
For the x86 case mentioned there, we now produce:
leal 1(%rdi), %eax
subl %esi, %eax
We have target hooks to invert this in DAGCombiner (and x86 is enabled) with:
https://reviews.llvm.org/rL296977
https://reviews.llvm.org/rL311731
AArch64 and possibly other targets would probably benefit from enabling those hooks too.
See PR30327:
https://bugs.llvm.org/show_bug.cgi?id=30327#c2
Differential Revision: https://reviews.llvm.org/D40612
llvm-svn: 319964
Diffstat (limited to 'llvm/lib/ProfileData/Coverage/CoverageMapping.cpp')
0 files changed, 0 insertions, 0 deletions