[RS4GC] Fix rematerialization of bitcast of bitcast.

[oota-llvm.git] / lib / Transforms / Scalar / RewriteStatepointsForGC.cpp

diff --git a/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp b/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
index a077ba01a9282425e9ffe7c39b75a486a9eb36ce..a9dc8d8eec079f9606af494a15dc565ffbcc2652 100644 (file)
--- a/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
+++ b/lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
@@ -2101,16 +2101,12 @@ static bool findRematerializableChainToBasePointer(
   }
 
   if (CastInst *CI = dyn_cast<CastInst>(CurrentValue)) {
   }
 
   if (CastInst *CI = dyn_cast<CastInst>(CurrentValue)) {

-    Value *Def = CI->stripPointerCasts();
-
-    // This two checks are basically similar. First one is here for the
-    // consistency with findBasePointers logic.
-    assert(!isa<CastInst>(Def) && "not a pointer cast found");

     if (!CI->isNoopCast(CI->getModule()->getDataLayout()))
       return false;
 
     ChainToBase.push_back(CI);
     if (!CI->isNoopCast(CI->getModule()->getDataLayout()))
       return false;
 
     ChainToBase.push_back(CI);

-    return findRematerializableChainToBasePointer(ChainToBase, Def, BaseValue);
+    return findRematerializableChainToBasePointer(ChainToBase,
+                                                  CI->getOperand(0), BaseValue);

   }
 
   // Not supported instruction in the chain
   }
 
   // Not supported instruction in the chain