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Pull the PHI special case into it's own visit* method

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llvm-svn: 9332
This commit is contained in:
Chris Lattner 2003-10-21 16:09:23 +00:00
parent 4b8ce1c80d
commit 2c063c848d
1 changed files with 12 additions and 9 deletions
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21
lib/Target/Sparc/PreSelection.cpp
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@ -73,6 +73,7 @@ namespace {
void visitInstruction(Instruction &I); // common work for every instr.
void visitGetElementPtrInst(GetElementPtrInst &I);
void visitCallInst(CallInst &I);
void visitPHINode(PHINode &PN);
// Helper functions for visiting operands of every instruction
//
@ -210,19 +211,21 @@ PreSelection::visitOneOperand(Instruction &I, Value* Op, unsigned opNum,
//
inline void PreSelection::visitOperands(Instruction &I, int firstOp) {
// For any instruction other than PHI, copies go just before the instr.
for (unsigned i = firstOp, e = I.getNumOperands(); i != e; ++i)
visitOneOperand(I, I.getOperand(i), i, I);
}
void PreSelection::visitPHINode(PHINode &PN) {
// For a PHI, operand copies must be before the terminator of the
// appropriate predecessor basic block. Remaining logic is simple
// so just handle PHIs and other instructions separately.
//
if (PHINode* phi = dyn_cast<PHINode>(&I)) {
for (unsigned i=firstOp, N=phi->getNumIncomingValues(); i != N; ++i)
visitOneOperand(I, phi->getIncomingValue(i),
phi->getOperandNumForIncomingValue(i),
* phi->getIncomingBlock(i)->getTerminator());
} else {
for (unsigned i=firstOp, N=lastOp; i != I.getNumOperands(); ++i)
visitOneOperand(I, I.getOperand(i), i, I);
}
for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i)
visitOneOperand(I, PN.getIncomingValue(i),
PN.getOperandNumForIncomingValue(i),
*PN.getIncomingBlock(i)->getTerminator());
// do not call visitOperands!
}