commit	859e14aeaabb3c32c0cd09cee89a40e228dd07c1	[log] [tgz]
author	Roman Lebedev <lebedev.ri@gmail.com>	Sat Jul 14 20:08:16 2018 +0000
committer	Roman Lebedev <lebedev.ri@gmail.com>	Sat Jul 14 20:08:16 2018 +0000
tree	8bad5f38d22482ad85e8567206a9c7a19a1bcea7
parent	62d050d2c47d9275e8d2ed827dbe89149fb440e3 [diff]

[InstCombine] Fold  x s> x & (-1 >> y)  to  x s> (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

llvm-svn: 337105

llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp[diff]
llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sgt-to-icmp-sgt.ll[diff]

2 files changed

tree: 8bad5f38d22482ad85e8567206a9c7a19a1bcea7

clang/
clang-tools-extra/
compiler-rt/
debuginfo-tests/
libclc/
libcxx/
libcxxabi/
libunwind/
lld/
lldb/
llgo/
llvm/
openmp/
parallel-libs/
polly/
README.md

README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.