[SCEVExpander][PowerPC]clear scev rewriter before deleting instructions.

Reviewed By: lebedev.ri Differential Revision: https://reviews.llvm.org/D85130
llvm · Aug 4, 2020 · ba95539 · ba95539
1 parent 675ad1b
commit ba95539
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/llvm/lib/Target/PowerPC/PPCLoopInstrFormPrep.cpp b/llvm/lib/Target/PowerPC/PPCLoopInstrFormPrep.cpp
@@ -606,6 +606,10 @@ bool PPCLoopInstrFormPrep::rewriteLoadStores(Loop *L, Bucket &BucketChain,
       NewBasePtr = NewPHI;
   }
 
+  // Clear the rewriter cache, because values that are in the rewriter's cache
+  // can be deleted below, causing the AssertingVH in the cache to trigger.
+  SCEVE.clear();
+
   if (Instruction *IDel = dyn_cast<Instruction>(BasePtr))
     BBChanged.insert(IDel->getParent());
   BasePtr->replaceAllUsesWith(NewBasePtr);