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archived-llvm/test/Transforms/InstCombine
Sanjay Patel fe998e6ec2 [InstCombine] change bitwise logic type to eliminate bitcasts
In PR27925:
https://llvm.org/bugs/show_bug.cgi?id=27925

...we proposed adding this fold to eliminate a bitcast. In D20774, there was 
some concern about changing the type of a bitwise op as well as creating 
bitcasts that might not be free for a target. However, if we're strictly 
eliminating an instruction (by limiting this to one-use ops), then we should 
be able to do this in InstCombine.

But we're cautiously restricting the transform for now to vector types to
avoid possible backend problems. A transform to make sure the logic op is
legal for the target should be added to reverse this transform and improve
codegen.

Differential Revision: https://reviews.llvm.org/D26641



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@287707 91177308-0d34-0410-b5e6-96231b3b80d8
2016-11-22 22:05:48 +00:00
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This directory contains test cases for the instcombine transformation.  The
dated tests are actual bug tests, whereas the named tests are used to test
for features that the this pass should be capable of performing.