Fix test/Regression/CodeGen/PowerPC/2004-11-30-shift-crash.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18371 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPC32ISelSimple.cpp b/lib/Target/PowerPC/PPC32ISelSimple.cpp
index 2c43dca..33512c1 100644
--- a/lib/Target/PowerPC/PPC32ISelSimple.cpp
+++ b/lib/Target/PowerPC/PPC32ISelSimple.cpp
@@ -2766,7 +2766,12 @@
// than for a variable shift by using the rlwimi instruction.
if (ConstantUInt *CUI = dyn_cast<ConstantUInt>(ShiftAmount)) {
unsigned Amount = CUI->getValue();
- if (Amount < 32) {
+ if (Amount == 0) {
+ BuildMI(*MBB, IP, PPC::OR, 2, DestReg).addReg(SrcReg).addReg(SrcReg);
+ BuildMI(*MBB, IP, PPC::OR, 2, DestReg+1)
+ .addReg(SrcReg+1).addReg(SrcReg+1);
+
+ } else if (Amount < 32) {
unsigned TempReg = makeAnotherReg(ResultTy);
if (isLeftShift) {
BuildMI(*MBB, IP, PPC::RLWINM, 4, TempReg).addReg(SrcReg)