From: Nate Begeman <natebegeman@mac.com>
Date: Fri, 21 Oct 2005 06:36:18 +0000 (+0000)
Subject: Match rotate.  This does actually match the rotates in an rc5 cipher, but I
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=ae1641c39fe9886e4b22a5d79b5a25b4041b62bd;p=oota-llvm.git

Match rotate.  This does actually match the rotates in an rc5 cipher, but I
haven't seen it fire on our testsuite.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23863 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/PowerPC/PPCInstrInfo.td b/lib/Target/PowerPC/PPCInstrInfo.td
index 61be2ea648e..97beafb4e54 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/lib/Target/PowerPC/PPCInstrInfo.td
@@ -742,6 +742,9 @@ def : Pat<(or GPRC:$in, imm:$imm),
 // XOR an arbitrary immediate.
 def : Pat<(xor GPRC:$in, imm:$imm),
           (XORIS (XORI GPRC:$in, (LO16 imm:$imm)), (HI16 imm:$imm))>;
+def : Pat<(or (shl GPRC:$rS, GPRC:$rB),
+              (srl GPRC:$rS, (sub 32, GPRC:$rB))),
+          (RLWNM GPRC:$rS, GPRC:$rB, 0, 31)>;
 
 def : Pat<(zext GPRC:$in),
           (RLDICL (OR4To8 GPRC:$in, GPRC:$in), 0, 32)>;