Fix GLIBCXX_DEBUG errors. Erase invalidates std::vector iterators

passed the erased element.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45099 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/DCE.cpp b/lib/Transforms/Scalar/DCE.cpp
index 163c2b0..9cad236 100644 (file)
--- a/lib/Transforms/Scalar/DCE.cpp
+++ b/lib/Transforms/Scalar/DCE.cpp
@@ -109,11 +109,10 @@ bool DCE::runOnFunction(Function &F) {
       I->eraseFromParent();
 
       // Remove the instruction from the worklist if it still exists in it.
-      for (std::vector<Instruction*>::iterator WI = WorkList.begin(),
-             E = WorkList.end(); WI != E; ++WI)
+      for (std::vector<Instruction*>::iterator WI = WorkList.begin();
+           WI != WorkList.end(); ++WI)
         if (*WI == I) {
-          WorkList.erase(WI);
-          --E;
+          WI = WorkList.erase(WI);
           --WI;
         }