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Fix PowerPC/2006-05-12-rlwimi-crash.ll
Nate, please verify that if InsertMask is 0, rlwimi shouldn't be used. This fixes the crash and causes no PPC testsuite regressions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28243 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -365,7 +365,7 @@ static bool isRotateAndMask(SDNode *N, unsigned Mask, bool IsShiftMask,
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// if the mask doesn't intersect any Indeterminant bits
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if (Mask && !(Mask & Indeterminant)) {
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SH = Shift;
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SH = Shift & 31;
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// make sure the mask is still a mask (wrap arounds may not be)
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return isRunOfOnes(Mask, MB, ME);
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}
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@ -431,7 +431,7 @@ SDNode *PPCDAGToDAGISel::SelectBitfieldInsert(SDNode *N) {
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}
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unsigned MB, ME;
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if (isRunOfOnes(InsertMask, MB, ME)) {
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if (InsertMask && isRunOfOnes(InsertMask, MB, ME)) {
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SDOperand Tmp1, Tmp2, Tmp3;
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bool DisjointMask = (TargetMask ^ InsertMask) == 0xFFFFFFFF;
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@ -454,6 +454,7 @@ SDNode *PPCDAGToDAGISel::SelectBitfieldInsert(SDNode *N) {
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Tmp3 = (Op0Opc == ISD::AND && DisjointMask) ? Op0.getOperand(0) : Op0;
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Select(Tmp1, Tmp3);
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Select(Tmp2, Op1);
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SH &= 31;
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return CurDAG->getTargetNode(PPC::RLWIMI, MVT::i32, Tmp1, Tmp2,
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getI32Imm(SH), getI32Imm(MB), getI32Imm(ME));
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}
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@ -1149,7 +1150,7 @@ void PPCDAGToDAGISel::Select(SDOperand &Result, SDOperand Op) {
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SDOperand Val;
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Select(Val, N->getOperand(0).getOperand(0));
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Result = CurDAG->SelectNodeTo(N, PPC::RLWINM, MVT::i32,
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Val, getI32Imm(SH & 0x1F), getI32Imm(MB),
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Val, getI32Imm(SH), getI32Imm(MB),
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getI32Imm(ME));
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return;
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}
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