From 8e86542fb698258a7feaa5703a1cf3918a7198fb Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Thu, 21 Mar 2002 06:24:00 +0000 Subject: [PATCH] Implement the new InsertInstBeforeInst function git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1930 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/TransformInternals.cpp | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/lib/Transforms/TransformInternals.cpp b/lib/Transforms/TransformInternals.cpp index c09ad3d2983..9ea053e040b 100644 --- a/lib/Transforms/TransformInternals.cpp +++ b/lib/Transforms/TransformInternals.cpp @@ -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