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Remove debugging printout
Instcombine (setcc (truncate X), C1). This occurs THOUSANDS of times in many benchmarks. Particularlly common seem to be things like (seteq (cast bool X to int), int 0) This turns it into (seteq bool %X, false), which then becomes (not %X). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16567 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -837,7 +837,6 @@ Instruction *InstCombiner::visitDiv(BinaryOperator &I) {
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if (Instruction *LHS = dyn_cast<Instruction>(I.getOperand(0)))
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if (LHS->getOpcode() == Instruction::Div)
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if (ConstantInt *LHSRHS = dyn_cast<ConstantInt>(LHS->getOperand(1))) {
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std::cerr << "DIV: " << *LHS << " : " << I;
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// (X / C1) / C2 -> X / (C1*C2)
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return BinaryOperator::createDiv(LHS->getOperand(0),
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ConstantExpr::getMul(RHS, LHSRHS));
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@ -1764,6 +1763,44 @@ Instruction *InstCombiner::visitSetCondInst(BinaryOperator &I) {
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}
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break;
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case Instruction::Cast: { // (setcc (cast X to larger), CI)
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const Type *SrcTy = LHSI->getOperand(0)->getType();
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if (SrcTy->isIntegral() && LHSI->getType()->isIntegral()) {
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unsigned SrcBits = SrcTy->getPrimitiveSize();
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if (SrcTy == Type::BoolTy) SrcBits = 1;
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unsigned DestBits = LHSI->getType()->getPrimitiveSize();
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if (LHSI->getType() == Type::BoolTy) DestBits = 1;
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if (SrcBits < DestBits) {
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// Check to see if the comparison is always true or false.
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Constant *NewCst = ConstantExpr::getCast(CI, SrcTy);
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if (ConstantExpr::getCast(NewCst, LHSI->getType()) != CI) {
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Constant *Min = ConstantIntegral::getMinValue(SrcTy);
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Constant *Max = ConstantIntegral::getMaxValue(SrcTy);
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Min = ConstantExpr::getCast(Min, LHSI->getType());
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Max = ConstantExpr::getCast(Max, LHSI->getType());
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switch (I.getOpcode()) {
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default: assert(0 && "unknown integer comparison");
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case Instruction::SetEQ:
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return ReplaceInstUsesWith(I, ConstantBool::False);
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case Instruction::SetNE:
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return ReplaceInstUsesWith(I, ConstantBool::True);
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case Instruction::SetLT:
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return ReplaceInstUsesWith(I, ConstantExpr::getSetLT(Max, CI));
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case Instruction::SetLE:
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return ReplaceInstUsesWith(I, ConstantExpr::getSetLE(Max, CI));
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case Instruction::SetGT:
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return ReplaceInstUsesWith(I, ConstantExpr::getSetGT(Min, CI));
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case Instruction::SetGE:
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return ReplaceInstUsesWith(I, ConstantExpr::getSetGE(Min, CI));
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}
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}
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return new SetCondInst(I.getOpcode(), LHSI->getOperand(0),
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ConstantExpr::getCast(CI, SrcTy));
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}
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}
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break;
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}
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case Instruction::Shl: // (setcc (shl X, ShAmt), CI)
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if (ConstantUInt *ShAmt = dyn_cast<ConstantUInt>(LHSI->getOperand(1))) {
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switch (I.getOpcode()) {
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