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Use constantexprs for casts. Eliminate use of the ConstantHandling interfaces
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10779 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -22,11 +22,12 @@
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/Scalar.h"
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#include "llvm/ConstantHandling.h"
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#include "llvm/Constants.h"
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#include "llvm/Function.h"
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#include "llvm/GlobalVariable.h"
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#include "llvm/Instructions.h"
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#include "llvm/Pass.h"
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#include "llvm/Type.h"
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#include "llvm/Support/InstVisitor.h"
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#include "Support/Debug.h"
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#include "Support/Statistic.h"
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@ -558,17 +559,10 @@ void SCCP::visitTerminatorInst(TerminatorInst &TI) {
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void SCCP::visitCastInst(CastInst &I) {
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Value *V = I.getOperand(0);
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InstVal &VState = getValueState(V);
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if (VState.isOverdefined()) { // Inherit overdefinedness of operand
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if (VState.isOverdefined()) // Inherit overdefinedness of operand
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markOverdefined(&I);
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} else if (VState.isConstant()) { // Propagate constant value
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Constant *Result =
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ConstantFoldCastInstruction(VState.getConstant(), I.getType());
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if (Result) // If this instruction constant folds!
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markConstant(&I, Result);
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else
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markOverdefined(&I); // Don't know how to fold this instruction. :(
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}
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else if (VState.isConstant()) // Propagate constant value
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markConstant(&I, ConstantExpr::getCast(VState.getConstant(), I.getType()));
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}
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// Handle BinaryOperators and Shift Instructions...
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