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Do not codegen 'xor bool, true' as 'not reg'. not reg inverts the upper bits
of the bytereg. This fixes yacr2, 300.twolf and probably others. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19622 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1585,16 +1585,19 @@ unsigned ISel::SelectExpr(SDOperand N) {
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if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Op1)) {
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if (CN->isAllOnesValue() && Node->getOpcode() == ISD::XOR) {
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Opc = 0;
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switch (N.getValueType()) {
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default: assert(0 && "Cannot add this type!");
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case MVT::i1:
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case MVT::i1: break; // Not supported, don't invert upper bits!
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case MVT::i8: Opc = X86::NOT8r; break;
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case MVT::i16: Opc = X86::NOT16r; break;
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case MVT::i32: Opc = X86::NOT32r; break;
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}
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Tmp1 = SelectExpr(Op0);
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BuildMI(BB, Opc, 1, Result).addReg(Tmp1);
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return Result;
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if (Opc) {
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Tmp1 = SelectExpr(Op0);
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BuildMI(BB, Opc, 1, Result).addReg(Tmp1);
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return Result;
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}
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}
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switch (N.getValueType()) {
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