commit ba5d0abe39611cd5d762d8d385cc1e93aa700817
author Dan Gohman <gohman@apple.com> Mon Dec 13 22:47:57 2010 +0000
committer Dan Gohman <gohman@apple.com> Mon Dec 13 22:47:57 2010 +0000
tree a3dd7cdc01d5efaf74326b270b095895aa2d8042
parent 1782783095b51000831c7d2fd1d763355b5adc0f

Update memdep to handle PartialAlias as MayAlias.

llvm-svn: 121723

llvm/lib/Analysis/MemoryDependenceAnalysis.cpp

diff --git a/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp b/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
index c833184..1cd7dec 100644
--- a/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
+++ b/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
@@ -291,7 +291,7 @@
         continue;
       
       // May-alias loads don't depend on each other without a dependence.
-      if (isLoad && R == AliasAnalysis::MayAlias)
+      if (isLoad && R != AliasAnalysis::MustAlias)
         continue;
 
       // Stores don't alias loads from read-only memory.
@@ -323,9 +323,9 @@
       
       if (R == AliasAnalysis::NoAlias)
         continue;
-      if (R == AliasAnalysis::MayAlias)
-        return MemDepResult::getClobber(Inst);
-      return MemDepResult::getDef(Inst);
+      if (R == AliasAnalysis::MustAlias)
+        return MemDepResult::getDef(Inst);
+      return MemDepResult::getClobber(Inst);
     }
 
     // If this is an allocation, and if we know that the accessed pointer is to