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| author | Sanjay Patel <spatel@rotateright.com> | 2018-01-21 16:14:51 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2018-01-21 16:14:51 +0000 |
| commit | 9530f1886433d77bc203c366915a9ab3160c7efc (patch) | |
| tree | 7713b04c77141e282a864a0e30e243e64ab4a143 /llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp | |
| parent | 7a44e4d594c98b5998ebffc041490564953a3cb8 (diff) | |
| download | bcm5719-llvm-9530f1886433d77bc203c366915a9ab3160c7efc.tar.gz bcm5719-llvm-9530f1886433d77bc203c366915a9ab3160c7efc.zip | |
[InstCombine] (X << Y) / X -> 1 << Y
...when the shift is known to not overflow with the matching
signed-ness of the division.
This closes an optimization gap caused by canonicalizing mul
by power-of-2 to shl as shown in PR35709:
https://bugs.llvm.org/show_bug.cgi?id=35709
Patch by Anton Bikineev!
Differential Revision: https://reviews.llvm.org/D42032
llvm-svn: 323068
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp')
0 files changed, 0 insertions, 0 deletions
