Fix test/Regression/CodeGen/PowerPC/2004-11-29-ShrCrash.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18374 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/PowerPC/PPC32ISelSimple.cpp b/lib/Target/PowerPC/PPC32ISelSimple.cpp
index 33512c1e393c9930197630f426eb60e2460bc35a..7b9a312a11482a021fbf65b5f6791c0a42a90f6f 100644 (file)
--- a/lib/Target/PowerPC/PPC32ISelSimple.cpp
+++ b/lib/Target/PowerPC/PPC32ISelSimple.cpp
@@ -2910,7 +2910,9 @@ void PPC32ISel::emitShiftOperation(MachineBasicBlock *MBB,
       return;
     
     unsigned SrcReg = getReg (Op, MBB, IP);
-    if (isLeftShift) {
+    if (Amount == 0) {
+      BuildMI(*MBB, IP, PPC::OR, 2, DestReg).addReg(SrcReg).addReg(SrcReg);
+    } else if (isLeftShift) {
       BuildMI(*MBB, IP, PPC::RLWINM, 4, DestReg).addReg(SrcReg)
         .addImm(Amount).addImm(0).addImm(31-Amount);
     } else {