Re: [PATCH] Canonicalize real X - CST to X + -CST

2020-09-17 Thread Richard Biener
On Thu, 17 Sep 2020, Michael Matz wrote: > Hello, > > On Wed, 16 Sep 2020, Richard Biener wrote: > > > This removes the canonicalization of X + -CST to X - CST to facilitate > > SLP vectorization analysis where we currently treat the added testcase > > as two-operation plus blend vectorization o

Re: [PATCH] Canonicalize real X - CST to X + -CST

2020-09-17 Thread Michael Matz
Hello, On Wed, 16 Sep 2020, Richard Biener wrote: > This removes the canonicalization of X + -CST to X - CST to facilitate > SLP vectorization analysis where we currently treat the added testcase > as two-operation plus blend vectorization opportunity. While there > may be the possibility to avo

[PATCH] Canonicalize real X - CST to X + -CST

2020-09-16 Thread Richard Biener
This removes the canonicalization of X + -CST to X - CST to facilitate SLP vectorization analysis where we currently treat the added testcase as two-operation plus blend vectorization opportunity. While there may be the possibility to avoid this in the vectorizer itself the canonicalization is som