projects / oota-llvm.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: dbabd5a) | patch
Revert r170020, "Simplify negated bit test", for now.
authorNAKAMURA Takumi <geek4civic@gmail.com>
Thu, 13 Dec 2012 14:28:16 +0000 (14:28 +0000)
committerNAKAMURA Takumi <geek4civic@gmail.com>
Thu, 13 Dec 2012 14:28:16 +0000 (14:28 +0000)
commitbb9004e0dcef07ef7538784e46bbdd3cb3789d24
tree61ea6a8a09409e74a6b1d24ad7efc61664d97356tree | snapshot
parentdbabd5acad7f2b483f12469648cab2d3445b90e2commit | diff
Revert r170020, "Simplify negated bit test", for now.

This assumes (1 << n) is always not zero. Consider n is greater than word size.
Although I know it is undefined, this transforms undefined behavior hidden.

This led clang unexpected behavior with some failures. I will investigate to fix undefined shl in clang.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170128 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Transforms/InstCombine/InstCombineCompares.cpp diff | blob | history
test/Transforms/InstCombine/icmp.ll diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors