[llvm-commits] [llvm] r151446 - in /llvm/trunk: include/llvm/Analysis/AliasAnalysis.h lib/Analysis/AliasAnalysis.cpp lib/Analysis/BasicAliasAnalysis.cpp

[Nick Lewycky]

Author: nicholas
Date: Sat Feb 25 04:56:28 2012
New Revision: 151446

URL: http://llvm.org/viewvc/llvm-project?rev=151446&view=rev
Log:
Move isKnownNonNull from private implementation detail of BasicAA to a public
function that others can use, next to llvm::isIdentifiedObject.

Modified:
    llvm/trunk/include/llvm/Analysis/AliasAnalysis.h
    llvm/trunk/lib/Analysis/AliasAnalysis.cpp
    llvm/trunk/lib/Analysis/BasicAliasAnalysis.cpp

Modified: llvm/trunk/include/llvm/Analysis/AliasAnalysis.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Analysis/AliasAnalysis.h?rev=151446&r1=151445&r2=151446&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Analysis/AliasAnalysis.h (original)
+++ llvm/trunk/include/llvm/Analysis/AliasAnalysis.h Sat Feb 25 04:56:28 2012
@@ -568,6 +568,11 @@
 ///
 bool isIdentifiedObject(const Value *V);
 
+/// isKnownNonNull - Return true if this pointer couldn't possibly be null by
+/// its definition.  This returns true for allocas, non-extern-weak globals and
+/// byval arguments.
+bool isKnownNonNull(const Value *V);
+
 } // End llvm namespace
 
 #endif

Modified: llvm/trunk/lib/Analysis/AliasAnalysis.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/AliasAnalysis.cpp?rev=151446&r1=151445&r2=151446&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/AliasAnalysis.cpp (original)
+++ llvm/trunk/lib/Analysis/AliasAnalysis.cpp Sat Feb 25 04:56:28 2012
@@ -440,3 +440,19 @@
     return A->hasNoAliasAttr() || A->hasByValAttr();
   return false;
 }
+
+/// isKnownNonNull - Return true if we know that the specified value is never
+/// null.
+bool llvm::isKnownNonNull(const Value *V) {
+  // Alloca never returns null, malloc might.
+  if (isa<AllocaInst>(V)) return true;
+
+  // A byval argument is never null.
+  if (const Argument *A = dyn_cast<Argument>(V))
+    return A->hasByValAttr();
+
+  // Global values are not null unless extern weak.
+  if (const GlobalValue *GV = dyn_cast<GlobalValue>(V))
+    return !GV->hasExternalWeakLinkage();
+  return false;
+}

Modified: llvm/trunk/lib/Analysis/BasicAliasAnalysis.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/BasicAliasAnalysis.cpp?rev=151446&r1=151445&r2=151446&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/BasicAliasAnalysis.cpp (original)
+++ llvm/trunk/lib/Analysis/BasicAliasAnalysis.cpp Sat Feb 25 04:56:28 2012
@@ -42,22 +42,6 @@
 // Useful predicates
 //===----------------------------------------------------------------------===//
 
-/// isKnownNonNull - Return true if we know that the specified value is never
-/// null.
-static bool isKnownNonNull(const Value *V) {
-  // Alloca never returns null, malloc might.
-  if (isa<AllocaInst>(V)) return true;
-  
-  // A byval argument is never null.
-  if (const Argument *A = dyn_cast<Argument>(V))
-    return A->hasByValAttr();
-
-  // Global values are not null unless extern weak.
-  if (const GlobalValue *GV = dyn_cast<GlobalValue>(V))
-    return !GV->hasExternalWeakLinkage();
-  return false;
-}
-
 /// isNonEscapingLocalObject - Return true if the pointer is to a function-local
 /// object that never escapes from the function.
 static bool isNonEscapingLocalObject(const Value *V) {