From: Chris Lattner Date: Mon, 29 Jul 2002 22:32:06 +0000 (+0000) Subject: Implement a new RemoveSuccessor function X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=229a3770f699e8688d0d6c798920ac5a497ada44;p=oota-llvm.git Implement a new RemoveSuccessor function git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3130 91177308-0d34-0410-b5e6-96231b3b80d8 --- diff --git a/include/llvm/Transforms/Utils/BasicBlockUtils.h b/include/llvm/Transforms/Utils/BasicBlockUtils.h index 282be5e909f..3e8edcec1a0 100644 --- a/include/llvm/Transforms/Utils/BasicBlockUtils.h +++ b/include/llvm/Transforms/Utils/BasicBlockUtils.h @@ -13,7 +13,6 @@ #include "llvm/BasicBlock.h" class Instruction; - // ReplaceInstWithValue - Replace all uses of an instruction (specified by BI) // with a value, then remove and delete the original instruction. // @@ -28,10 +27,18 @@ void ReplaceInstWithInst(BasicBlock::InstListType &BIL, BasicBlock::iterator &BI, Instruction *I); // ReplaceInstWithInst - Replace the instruction specified by From with the -// instruction specified by To. Note that this is slower than providing an -// iterator directly, because the basic block containing From must be searched -// for the instruction. +// instruction specified by To. // void ReplaceInstWithInst(Instruction *From, Instruction *To); + +// RemoveSuccessor - Change the specified terminator instruction such that its +// successor #SuccNum no longer exists. Because this reduces the outgoing +// degree of the current basic block, the actual terminator instruction itself +// may have to be changed. In the case where the last successor of the block is +// deleted, a return instruction is inserted in its place which can cause a +// suprising change in program behavior if it is not expected. +// +void RemoveSuccessor(TerminatorInst *TI, unsigned SuccNum); + #endif