Generate alias metadata even in OpenMP mode

To make alias scope metadata generation work in OpenMP mode we now provide
the ScopAnnotator with information about the base pointer rewrite that happens
when passing arrays into the OpenMP subfunction.

llvm-svn: 245451

1 files changed, 10 insertions, 2 deletions

diff --git a/polly/lib/CodeGen/IRBuilder.cpp b/polly/lib/CodeGen/IRBuilder.cpp
index 65f6fe84fb7..8374ae673cd 100644
--- a/polly/lib/CodeGen/IRBuilder.cpp
+++ b/polly/lib/CodeGen/IRBuilder.cpp
@@ -135,8 +135,16 @@ void ScopAnnotator::annotate(Instruction *Inst) {
     }
 
     if (BasePtr) {
-      Inst->setMetadata("alias.scope", AliasScopeMap[BasePtr]);
-      Inst->setMetadata("noalias", OtherAliasScopeListMap[BasePtr]);
+      auto *AliasScope = AliasScopeMap[BasePtr];
+
+      if (!AliasScope)
+        BasePtr = AlternativeAliasBases[BasePtr];
+
+      AliasScope = AliasScopeMap[BasePtr];
+      auto *OtherAliasScopeList = OtherAliasScopeListMap[BasePtr];
+
+      Inst->setMetadata("alias.scope", AliasScope);
+      Inst->setMetadata("noalias", OtherAliasScopeList);
     }
   }