| commit | 7c82b970fb5a5a1ba989498a225f52a7935b96a0 | |
| author | Nemanja Ivanovic <nemanja.i.ibm@gmail.com> | |
| Wed, 15 Aug 2018 12:58:13 +0000 (15 12:58 +0000) | ||
| committer | Nemanja Ivanovic <nemanja.i.ibm@gmail.com> | |
| Wed, 15 Aug 2018 12:58:13 +0000 (15 12:58 +0000) | ||
| tree | dc237e095d5687e62c046c01bd0ec32d7e510507 | treesnapshot (tar.gz zip) |
| parent | 47bbfe3bd01e23ff8fd416cd3fd9223414c5d9f4 | commitdiff |
[PowerPC] Don't run BV DAG Combine before legalization if it assumes legal types
When trying to combine a DAG that builds a vector out of sign-extensions of
vector extracts, the code assumes legal input types. Due to that, we have to
disable this combine prior to legalization.
In some cases, the DAG will look slightly different after legalization so
account for that in the matching code.
This is a fix for https://bugs.llvm.org/show_bug.cgi?id=38087
Differential Revision: https://reviews.llvm.org/D49080
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@339769 91177308-0d34-0410-b5e6-96231b3b80d8
When trying to combine a DAG that builds a vector out of sign-extensions of
vector extracts, the code assumes legal input types. Due to that, we have to
disable this combine prior to legalization.
In some cases, the DAG will look slightly different after legalization so
account for that in the matching code.
This is a fix for https://bugs.llvm.org/show_bug.cgi?id=38087
Differential Revision: https://reviews.llvm.org/D49080
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@339769 91177308-0d34-0410-b5e6-96231b3b80d8
| lib/Target/PowerPC/PPCISelLowering.cpp | diffblobblamehistory | |
| test/CodeGen/PowerPC/pr38087.ll | [new file with mode: 0644] | blob |