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Use constantexprs for casts. Eliminate use of the ConstantHandling interfaces

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10779 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-01-12 17:43:40 +00:00
parent 84831642e4
commit b7a5d3edee
1 changed files with 5 additions and 11 deletions
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16
lib/Transforms/Scalar/SCCP.cpp
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@ -22,11 +22,12 @@
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Scalar.h"
#include "llvm/ConstantHandling.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Instructions.h"
#include "llvm/Pass.h"
#include "llvm/Type.h"
#include "llvm/Support/InstVisitor.h"
#include "Support/Debug.h"
#include "Support/Statistic.h"
@ -558,17 +559,10 @@ void SCCP::visitTerminatorInst(TerminatorInst &TI) {
void SCCP::visitCastInst(CastInst &I) {
Value *V = I.getOperand(0);
InstVal &VState = getValueState(V);
if (VState.isOverdefined()) { // Inherit overdefinedness of operand
if (VState.isOverdefined()) // Inherit overdefinedness of operand
markOverdefined(&I);
} else if (VState.isConstant()) { // Propagate constant value
Constant *Result =
ConstantFoldCastInstruction(VState.getConstant(), I.getType());
if (Result) // If this instruction constant folds!
markConstant(&I, Result);
else
markOverdefined(&I); // Don't know how to fold this instruction. :(
}
else if (VState.isConstant()) // Propagate constant value
markConstant(&I, ConstantExpr::getCast(VState.getConstant(), I.getType()));
}
// Handle BinaryOperators and Shift Instructions...