From 36bf506ad3c99a309ca8bd73bd03563d8d068ac0 Mon Sep 17 00:00:00 2001 From: Roman Divacky Date: Wed, 4 Nov 2009 14:58:56 +0000 Subject: Update LLVM to r86025. --- lib/Transforms/Scalar/CodeGenPrepare.cpp | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'lib/Transforms/Scalar/CodeGenPrepare.cpp') diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp index 42209b8cbe2d..9ca90c333af9 100644 --- a/lib/Transforms/Scalar/CodeGenPrepare.cpp +++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp @@ -318,6 +318,7 @@ static void SplitEdgeNicely(TerminatorInst *TI, unsigned SuccNum, if (Invoke->getSuccessor(1) == Dest) return; } + // As a hack, never split backedges of loops. Even though the copy for any // PHIs inserted on the backedge would be dead for exits from the loop, we @@ -852,7 +853,7 @@ bool CodeGenPrepare::OptimizeBlock(BasicBlock &BB) { // Split all critical edges where the dest block has a PHI. TerminatorInst *BBTI = BB.getTerminator(); - if (BBTI->getNumSuccessors() > 1) { + if (BBTI->getNumSuccessors() > 1 && !isa(BBTI)) { for (unsigned i = 0, e = BBTI->getNumSuccessors(); i != e; ++i) { BasicBlock *SuccBB = BBTI->getSuccessor(i); if (isa(SuccBB->begin()) && isCriticalEdge(BBTI, i, true)) -- cgit v1.3