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Minor tweak to avoid an extra reg-reg copy that the register allocator has to eliminate
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12680 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1109,12 +1109,21 @@ void ISel::promote32(unsigned targetReg, const ValueRecord &VR) {
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Value *Val = VR.Val;
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const Type *Ty = VR.Ty;
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if (Val)
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if (Val) {
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if (Constant *C = dyn_cast<Constant>(Val)) {
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Val = ConstantExpr::getCast(C, Type::IntTy);
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Ty = Type::IntTy;
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}
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// If this is a simple constant, just emit a MOVri directly to avoid the
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// copy.
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if (ConstantInt *CI = dyn_cast<ConstantInt>(Val)) {
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int TheVal = CI->getRawValue() & 0xFFFFFFFF;
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BuildMI(BB, X86::MOV32ri, 1, targetReg).addImm(TheVal);
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return;
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}
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}
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// Make sure we have the register number for this value...
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unsigned Reg = Val ? getReg(Val) : VR.Reg;
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@ -1109,12 +1109,21 @@ void ISel::promote32(unsigned targetReg, const ValueRecord &VR) {
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Value *Val = VR.Val;
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const Type *Ty = VR.Ty;
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if (Val)
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if (Val) {
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if (Constant *C = dyn_cast<Constant>(Val)) {
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Val = ConstantExpr::getCast(C, Type::IntTy);
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Ty = Type::IntTy;
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}
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// If this is a simple constant, just emit a MOVri directly to avoid the
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// copy.
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if (ConstantInt *CI = dyn_cast<ConstantInt>(Val)) {
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int TheVal = CI->getRawValue() & 0xFFFFFFFF;
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BuildMI(BB, X86::MOV32ri, 1, targetReg).addImm(TheVal);
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return;
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}
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}
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// Make sure we have the register number for this value...
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unsigned Reg = Val ? getReg(Val) : VR.Reg;
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