From 619d3324bd2f3bcfc6bb33d50dc16c211d0d6471 Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Mon, 16 Aug 2010 16:31:39 +0000 Subject: Add a comment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111145 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Analysis/ScalarEvolution.cpp | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'lib/Analysis/ScalarEvolution.cpp') diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index 20b886e4aa..81194adb37 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/lib/Analysis/ScalarEvolution.cpp @@ -2468,6 +2468,11 @@ const SCEV *ScalarEvolution::getSCEV(Value *V) { std::map::const_iterator I = Scalars.find(V); if (I != Scalars.end()) return I->second; const SCEV *S = createSCEV(V); + + // The process of creating a SCEV for V may have caused other SCEVs + // to have been created, so it's necessary to insert the new entry + // from scratch, rather than trying to remember the insert position + // above. Scalars.insert(std::make_pair(SCEVCallbackVH(V, this), S)); return S; } -- cgit v1.2.3-18-g5258