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3 Commits

Author SHA1 Message Date
Vadzim Dambrouski
2546414701 [ARM] Fix PR37382: Don't optimize mul.with.overflow on thumbv6m. 
Reviewers: efriedma, rogfer01, javed.absar

Reviewed By: efriedma, rogfer01

Subscribers: kristof.beyls, chrib, llvm-commits

Differential Revision: https://reviews.llvm.org/D48846

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336144 91177308-0d34-0410-b5e6-96231b3b80d8
 2018-07-02 21:05:26 +00:00
Joel Galenson
1f504230b9 [ARM] Fix perf regression in compare optimization. 
Fix a performance regression caused by r322737.

While trying to make it easier to replace compares with existing adds and
subtracts, I accidentally stopped it from doing so in some cases.  This should
fix that.  I'm also fixing another potential bug in that commit.

Differential Revision: https://reviews.llvm.org/D42263

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322972 91177308-0d34-0410-b5e6-96231b3b80d8
 2018-01-19 17:46:27 +00:00
Joel Galenson
47c91393e1 [ARM] Optimize {s,u}mul.with.overflow. 
This extends my previous patches to also optimize overflow-checked multiplies during SelectionDAG.

Differential revision: https://reviews.llvm.org/D40922

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322738 91177308-0d34-0410-b5e6-96231b3b80d8
 2018-01-17 19:19:05 +00:00