projects / platform / upstream / llvm.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: 2e44769) | patch
Teach InstCombine to work with smaller legal types in icmp (shl %v, C1), C2
authorArnaud A. de Grandmaison <arnaud.adegm@gmail.com>
Fri, 15 Feb 2013 14:35:47 +0000 (14:35 +0000)
committerArnaud A. de Grandmaison <arnaud.adegm@gmail.com>
Fri, 15 Feb 2013 14:35:47 +0000 (14:35 +0000)
commit61c167c62b6852351102cdbcc80a5207d7fef1bb
tree5b59b3c0b2786c9dd1516ed7832d59a752cba3cbtree | snapshot
parent2e44769ed21b9190ff288e3c4e0a90a59a60f576commit | diff
Teach InstCombine to work with smaller legal types in icmp (shl %v, C1), C2

It enables to work with a smaller constant, which is target friendly for those which can compare to immediates.
It also avoids inserting a shift in favor of a trunc, which can be free on some targets.

This used to work until LLVM-3.1, but regressed with the 3.2 release.

llvm-svn: 175270
llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp diff | blob | history
llvm/test/Transforms/InstCombine/exact.ll diff | blob | history
llvm/test/Transforms/InstCombine/icmp.ll diff | blob | history
Domain: System / Toolchain;