[llvm] r277980 - [PM] Invalidate CallGraphAnalysis because it holds AssertingVH

[Sean Silva via llvm-commits]

Author: silvas
Date: Mon Aug  8 00:38:01 2016
New Revision: 277980

URL: http://llvm.org/viewvc/llvm-project?rev=277980&view=rev
Log:
[PM] Invalidate CallGraphAnalysis because it holds AssertingVH

This is essentially PR28400. The fix here is similar to that implemented
in r274656.

Modified:
    llvm/trunk/lib/Transforms/IPO/FunctionAttrs.cpp

Modified: llvm/trunk/lib/Transforms/IPO/FunctionAttrs.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/IPO/FunctionAttrs.cpp?rev=277980&r1=277979&r2=277980&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/IPO/FunctionAttrs.cpp (original)
+++ llvm/trunk/lib/Transforms/IPO/FunctionAttrs.cpp Mon Aug  8 00:38:01 2016
@@ -1271,6 +1271,11 @@ ReversePostOrderFunctionAttrsPass::run(M
   auto &CG = AM.getResult<CallGraphAnalysis>(M);
 
   bool Changed = deduceFunctionAttributeInRPO(M, CG);
+
+  // CallGraphAnalysis holds AssertingVH and must be invalidated eagerly so
+  // that other passes don't delete stuff from under it.
+  AM.invalidate<CallGraphAnalysis>(M);
+
   if (!Changed)
     return PreservedAnalyses::all();
   PreservedAnalyses PA;