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| author | Craig Topper <craig.topper@gmail.com> | 2017-04-23 17:16:26 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2017-04-23 17:16:26 +0000 |
| commit | 4e590e59a088128b7cc3733ed7ab4344cfcc4dc1 (patch) | |
| tree | b5827d4a992d36d3d61f11909c1ccf55ceab5ed6 /llvm/lib/Target/AMDGPU/R600ControlFlowFinalizer.cpp | |
| parent | 652ca99622954c5373427bbd51257b7f23b61aed (diff) | |
| download | bcm5719-llvm-4e590e59a088128b7cc3733ed7ab4344cfcc4dc1.tar.gz bcm5719-llvm-4e590e59a088128b7cc3733ed7ab4344cfcc4dc1.zip | |
[APInt] Make clearUnusedBits branch free.
This makes the WordBits calculation calculate a value between 1 and 64 for the number of bits in the last word. Previously if the BitWidth was a multiple of 64 bits the WordBits value was 0 and we had to bail out early to avoid an undefined shift. Now with a value of 64 we no longer have an undefined shift issue.
This shows a 15-16k reduction in the size of the opt binary on my local x86-64 build.
llvm-svn: 301134
Diffstat (limited to 'llvm/lib/Target/AMDGPU/R600ControlFlowFinalizer.cpp')
0 files changed, 0 insertions, 0 deletions
