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Implement the new InsertInstBeforeInst function

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llvm-svn: 1930
This commit is contained in:
Chris Lattner 2002-03-21 06:24:00 +00:00
parent 14fe793707
commit 559c71f6f4
1 changed files with 14 additions and 0 deletions
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14
lib/Transforms/TransformInternals.cpp
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@ -67,6 +67,20 @@ void ReplaceInstWithInst(Instruction *From, Instruction *To) {
ReplaceInstWithInst(BIL, 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);
}
// getStructOffsetType - Return a vector of offsets that are to be used to index