From 884a8fe5fa01f55aa53d9c2b02dbbf0f6c1a5837 Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Sun, 20 Jun 2010 00:54:38 +0000 Subject: Fix a crash caused by dereference of MBB.end(). rdar://8110842 llvm-svn: 106399 --- llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp') diff --git a/llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp b/llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp index d72bb5d731a..52ab71a71fe 100644 --- a/llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp +++ b/llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp @@ -317,12 +317,14 @@ Thumb2ITBlockPass::MoveCopyOutOfITBlock(MachineInstr *MI, // If not, then there is nothing to be gained by moving the copy. MachineBasicBlock::iterator I = MI; ++I; MachineBasicBlock::iterator E = MI->getParent()->end(); - while (I != E && I->isDebugValue()) - ++I; - unsigned NPredReg = 0; - ARMCC::CondCodes NCC = getPredicate(I, NPredReg); - if (NCC == CC || NCC == OCC) - return true; + if (I != E) { + while (I != E && I->isDebugValue()) + ++I; + unsigned NPredReg = 0; + ARMCC::CondCodes NCC = getPredicate(I, NPredReg); + if (NCC == CC || NCC == OCC) + return true; + } } return false; } -- cgit v1.2.3