| commit | 2c4ca6832fa6b306ee6a7010bfb80a3f2596f824 | |
| author | David Green <david.green@arm.com> | |
| Tue, 22 Oct 2019 15:39:47 +0000 (22 15:39 +0000) | ||
| committer | David Green <david.green@arm.com> | |
| Tue, 22 Oct 2019 15:39:47 +0000 (22 15:39 +0000) | ||
| tree | b978d8fba715be02c4f33013cc94e12267e2c86c | treesnapshot (tar.gz zip) |
| parent | 6e8533b05630a1e06d39a61270dcbf6d0662b3b5 | commitdiff |
[InstCombine] Signed saturation patterns
This adds an instcombine matcher for code that attempts to perform signed
saturating arithmetic by casting to a higher type. Unsigned cases are already
matched, this adds extra matches for the more complex signed cases, which
involves matching the min(max(add a b)) nodes with proper extends to ensure
legality.
Differential Revision: https://reviews.llvm.org/D68651
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375505 91177308-0d34-0410-b5e6-96231b3b80d8
This adds an instcombine matcher for code that attempts to perform signed
saturating arithmetic by casting to a higher type. Unsigned cases are already
matched, this adds extra matches for the more complex signed cases, which
involves matching the min(max(add a b)) nodes with proper extends to ensure
legality.
Differential Revision: https://reviews.llvm.org/D68651
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375505 91177308-0d34-0410-b5e6-96231b3b80d8