From 5c06f61e577f2c10ea0e6dd78f568fe58910fbbe Mon Sep 17 00:00:00 2001 From: Devang Patel Date: Fri, 5 Jun 2009 23:08:56 +0000 Subject: [PATCH] Simplify. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72970 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Analysis/ScalarEvolution.cpp | 21 ++++++--------------- 1 file changed, 6 insertions(+), 15 deletions(-) diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index 4b1cda08c8d..03c5005989e 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/lib/Analysis/ScalarEvolution.cpp @@ -2462,24 +2462,15 @@ void ScalarEvolution::forgetLoopPHIs(const Loop *L) { ScalarEvolution::BackedgeTakenInfo ScalarEvolution::ComputeBackedgeTakenCount(const Loop *L) { // If the loop has a non-one exit block count, we can't analyze it. - SmallVector ExitBlocks; - L->getExitBlocks(ExitBlocks); - if (ExitBlocks.size() != 1) return UnknownValue; + BasicBlock *ExitBlock = L->getExitBlock(); + if (!ExitBlock) + return UnknownValue; // Okay, there is one exit block. Try to find the condition that causes the // loop to be exited. - BasicBlock *ExitBlock = ExitBlocks[0]; - - BasicBlock *ExitingBlock = 0; - for (pred_iterator PI = pred_begin(ExitBlock), E = pred_end(ExitBlock); - PI != E; ++PI) - if (L->contains(*PI)) { - if (ExitingBlock == 0) - ExitingBlock = *PI; - else - return UnknownValue; // More than one block exiting! - } - assert(ExitingBlock && "No exits from loop, something is broken!"); + BasicBlock *ExitingBlock = L->getExitingBlock(); + if (!ExitingBlock) + return UnknownValue; // More than one block exiting! // Okay, we've computed the exiting block. See what condition causes us to // exit. -- 2.34.1