[PATCH] D38204: [TargetTransformInfo] Check if function pointer is valid before calling isLoweredToCall

[Guozhi Wei via Phabricator via llvm-commits]

Carrot created this revision.

Function isLoweredToCall can only accept non-null function pointer, but a function pointer can be null for indirect function call. So check it before calling isLoweredToCall from getInstructionLatency.


https://reviews.llvm.org/D38204

Files:
  include/llvm/Analysis/TargetTransformInfoImpl.h


Index: include/llvm/Analysis/TargetTransformInfoImpl.h
===================================================================
--- include/llvm/Analysis/TargetTransformInfoImpl.h
+++ include/llvm/Analysis/TargetTransformInfoImpl.h
@@ -794,7 +794,7 @@
     // A real function call is much slower.
     if (auto *CI = dyn_cast<CallInst>(I)) {
       const Function *F = CI->getCalledFunction();
-      if (static_cast<T *>(this)->isLoweredToCall(F))
+      if (!F || static_cast<T *>(this)->isLoweredToCall(F))
         return 40;
       // Some intrinsics return a value and a flag, we use the value type
       // to decide its latency.


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