We do not need to schedule another loop interchange pass after Polly, as Polly

should perform loop interchanges itself.

This also fixes a bug we see due to the "loop-interchange" pass producing
incorrect IR when compiling linpack-pc.c from the LLVM test-suite with
"-polly-position=before-vectorizer".

Reviewed-by: Tobias Grosser <tobias@grosser.es>
llvm-svn: 257495

polly/lib/CodeGen/CodegenCleanup.cpp

@@ -68,7 +68,7 @@ public:
     FPM->add(createIndVarSimplifyPass());
     FPM->add(createLoopIdiomPass());
     FPM->add(createLoopDeletionPass());
-    FPM->add(createLoopInterchangePass());
+    FPM->add(createDemoteRegisterToMemoryPass());
     FPM->add(createCFGSimplificationPass());
     FPM->add(createSimpleLoopUnrollPass());
     FPM->add(createMergedLoadStoreMotionPass());