Roman Lebedev c76334ba3d
[MIPS] For vectors, select add %x, C as sub %x, -C if it results in inline immediate ...
Summary:
As discussed in https://reviews.llvm.org/D62341#1515637 ,
for MIPS `add %x, -1` isn't optimal. Unlike X86 there
are no fastpaths to matearialize such `-1`/`1` vector constants,
and `sub %x, 1` results in better codegen,
so undo canonicalization
Reviewers: atanasyan, Petar.Avramovic, RKSimon
Reviewed By: atanasyan
Subscribers: sdardis, arichardson, hiraditya, jrtc27, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66805
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372254 91177308-0d34-0410-b5e6-96231b3b80d8
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