commit	61e77b11d1bf0fa02cfce416c56e6a598619d8db	[log] [tgz]
author	Craig Topper <craig.topper@intel.com>	Tue Apr 09 18:33:56 2019 +0000
committer	Craig Topper <craig.topper@intel.com>	Tue Apr 09 18:33:56 2019 +0000
tree	85b8aad010dddc9a20b8d04c79994877ac617054
parent	2f5e9de8d1f80e1e94e5eaacde7ba59ba0c55ca0 [diff]

[DAGCombiner][X86][SystemZ] Canonicalize SSUBO with immediate RHS to SADDO by negating the immediate.

This lines up with what we do for regular subtract and it matches up better with X86 assumptions in isel patterns that add with immediate is more canonical than sub with immediate.

Differential Revision: https://reviews.llvm.org/D60020

llvm-svn: 358027

llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp[diff]
llvm/test/CodeGen/SystemZ/int-ssub-07.ll[diff]
llvm/test/CodeGen/X86/sub-with-overflow.ll[diff]
llvm/test/CodeGen/X86/xaluo.ll[diff]

4 files changed

tree: 85b8aad010dddc9a20b8d04c79994877ac617054

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

README.md

The LLVM Compiler Infrastructure

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