[PATCH] D17781: Codegen: [PPC] Word Rotates are Zero Extending

[Kyle Butt via llvm-commits]

iteratee created this revision.
iteratee added a reviewer: kbarton.
iteratee added subscribers: echristo, timshen, llvm-commits.
iteratee set the repository for this revision to rL LLVM.

Add Word rotates to the list of instructions that are zero extending.
This allows them to be used in dot form to compare with zero.


Repository:
  rL LLVM

http://reviews.llvm.org/D17781

Files:
  lib/Target/PowerPC/PPCInstrInfo.cpp

Index: lib/Target/PowerPC/PPCInstrInfo.cpp
===================================================================
--- lib/Target/PowerPC/PPCInstrInfo.cpp
+++ lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -1572,7 +1572,8 @@
       // zero-extending.
       if (MIOpC == PPC::CNTLZW || MIOpC == PPC::CNTLZWo ||
           MIOpC == PPC::SLW    || MIOpC == PPC::SLWo ||
-          MIOpC == PPC::SRW    || MIOpC == PPC::SRWo) {
+          MIOpC == PPC::SRW    || MIOpC == PPC::SRWo ||
+          MIOpC == PPC::RLWINM || MIOpC == PPC::RLWNM) {
         noSub = true;
         equalityOnly = true;
       } else


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