From ae143ceb83e4247a59315304163d886faf7331b0 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sat, 14 Apr 2007 18:06:52 +0000 Subject: [PATCH] avoid iterator invalidation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36002 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/IPO/ConstantMerge.cpp | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/lib/Transforms/IPO/ConstantMerge.cpp b/lib/Transforms/IPO/ConstantMerge.cpp index 0f949a4743e..400b5e20312 100644 --- a/lib/Transforms/IPO/ConstantMerge.cpp +++ b/lib/Transforms/IPO/ConstantMerge.cpp @@ -60,8 +60,10 @@ bool ConstantMerge::runOnModule(Module &M) { // because doing so may cause initializers of other globals to be rewritten, // invalidating the Constant* pointers in CMap. // - for (Module::global_iterator GV = M.global_begin(), E = M.global_end(); - GV != E; ++GV) { + for (Module::global_iterator GVI = M.global_begin(), E = M.global_end(); + GVI != E; ) { + GlobalVariable *GV = GVI++; + // If this GV is dead, remove it. GV->removeDeadConstantUsers(); if (GV->use_empty() && GV->hasInternalLinkage()) {