[llvm-commits] CVS: llvm/lib/Analysis/LoadValueNumbering.cpp

[Chris Lattner]

Changes in directory llvm/lib/Analysis:

LoadValueNumbering.cpp updated: 1.3 -> 1.4

---
Log message:

If the alias analysis algorithm we are using can provide MUST alias information,
expose it directly as value numbering information


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Diffs of the changes:

Index: llvm/lib/Analysis/LoadValueNumbering.cpp
diff -u llvm/lib/Analysis/LoadValueNumbering.cpp:1.3 llvm/lib/Analysis/LoadValueNumbering.cpp:1.4
--- llvm/lib/Analysis/LoadValueNumbering.cpp:1.3	Mon Jun 16 07:06:41 2003
+++ llvm/lib/Analysis/LoadValueNumbering.cpp	Sat Jun 28 19:53:34 2003
@@ -17,6 +17,7 @@
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Pass.h"
+#include "llvm/Type.h"
 #include "llvm/iMemory.h"
 #include "llvm/BasicBlock.h"
 #include "llvm/Support/CFG.h"
@@ -83,6 +84,10 @@
 //
 void LoadVN::getEqualNumberNodes(Value *V,
                                  std::vector<Value*> &RetVals) const {
+  // If the alias analysis has any must alias information to share with us, we
+  // can definately use it.
+  if (isa<PointerType>(V->getType()))
+    getAnalysis<AliasAnalysis>().getMustAliases(V, RetVals);
 
   if (LoadInst *LI = dyn_cast<LoadInst>(V)) {
     // If we have a load instruction, find all of the load and store