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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2777 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2002-06-25 16:12:52 +00:00
parent a2204e1ff2
commit 18961504fc
43 changed files with 650 additions and 682 deletions
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lib/Transforms/Utils/BasicBlockUtils.cpp
+12 -31
View File
@@ -15,19 +15,18 @@
//
void ReplaceInstWithValue(BasicBlock::InstListType &BIL,
BasicBlock::iterator &BI, Value *V) {
Instruction *I = *BI;
Instruction &I = *BI;
// Replaces all of the uses of the instruction with uses of the value
I->replaceAllUsesWith(V);
I.replaceAllUsesWith(V);
// Remove the unneccesary instruction now...
BIL.remove(BI);
std::string OldName = I.getName();
// Delete the unneccesary instruction now...
BI = BIL.erase(BI);
// Make sure to propogate a name if there is one already...
if (I->hasName() && !V->hasName())
V->setName(I->getName(), BIL.getParent()->getSymbolTable());
// Remove the dead instruction now...
delete I;
if (OldName.size() && !V->hasName())
V->setName(OldName, BIL.getParent()->getSymbolTable());
}
@@ -41,13 +40,13 @@ void ReplaceInstWithInst(BasicBlock::InstListType &BIL,
"ReplaceInstWithInst: Instruction already inserted into basic block!");
// Insert the new instruction into the basic block...
BI = BIL.insert(BI, I)+1; // Increment BI to point to instruction to delete
BasicBlock::iterator New = BIL.insert(BI, I);
// Replace all uses of the old instruction, and delete it.
ReplaceInstWithValue(BIL, BI, I);
// Move BI back to point to the newly inserted instruction
--BI;
BI = New;
}
// ReplaceInstWithInst - Replace the instruction specified by From with the
@@ -56,24 +55,6 @@ void ReplaceInstWithInst(BasicBlock::InstListType &BIL,
// for the instruction.
//
void ReplaceInstWithInst(Instruction *From, Instruction *To) {
BasicBlock *BB = From->getParent();
BasicBlock::InstListType &BIL = BB->getInstList();
BasicBlock::iterator BI = find(BIL.begin(), BIL.end(), From);
assert(BI != BIL.end() && "Inst not in it's parents BB!");
ReplaceInstWithInst(BIL, BI, To);
BasicBlock::iterator BI(From);
ReplaceInstWithInst(From->getParent()->getInstList(), BI, To);
}
// InsertInstBeforeInst - Insert 'NewInst' into the basic block that 'Existing'
// is already in, and put it right before 'Existing'. This instruction should
// only be used when there is no iterator to Existing already around. The
// returned iterator points to the new instruction.
//
BasicBlock::iterator InsertInstBeforeInst(Instruction *NewInst,
Instruction *Existing) {
BasicBlock *BB = Existing->getParent();
BasicBlock::InstListType &BIL = BB->getInstList();
BasicBlock::iterator BI = find(BIL.begin(), BIL.end(), Existing);
assert(BI != BIL.end() && "Inst not in it's parents BB!");
return BIL.insert(BI, NewInst);
}