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Add stubs for setcc-branch folding support. 

llvm-svn: 18818
This commit is contained in:
Brian Gaeke 2004-12-12 06:01:26 +00:00
parent 40e4cec9ee
commit aa40b7d080
1 changed files with 11 additions and 0 deletions
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11
llvm/lib/Target/SparcV8/SparcV8ISelSimple.cpp
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@ -1010,6 +1010,14 @@ static inline BasicBlock *getBlockAfter(BasicBlock *BB) {
return I != BB->getParent()->end() ? &*I : 0;
}
/// canFoldSetCCIntoBranch - Return the setcc instruction if we can fold it
/// into the conditional branch which is the only user of the cc instruction.
/// This is the case if the conditional branch is the only user of the setcc.
///
static SetCondInst *canFoldSetCCIntoBranch(Value *V) {
return 0; // disable.
}
/// visitBranchInst - Handles conditional and unconditional branches.
///
void V8ISel::visitBranchInst(BranchInst &I) {
@ -1480,6 +1488,9 @@ void V8ISel::visitBinaryOperator (Instruction &I) {
}
void V8ISel::visitSetCondInst(SetCondInst &I) {
if (canFoldSetCCIntoBranch(&I))
return; // Fold this into a branch.
unsigned Op0Reg = getReg (I.getOperand (0));
unsigned Op1Reg = getReg (I.getOperand (1));
unsigned DestReg = getReg (I);