[llvm-commits] CVS: llvm/lib/Transforms/Scalar/PredicateSimplifier.cpp

[Nick Lewycky]

Changes in directory llvm/lib/Transforms/Scalar:

PredicateSimplifier.cpp updated: 1.20 -> 1.21
---
Log message:

AllocaInst can't return a null pointer. Fixes missed optimization
opportunity pointed out by Andrew Lewycky.


---
Diffs of the changes:  (+6 -0)

 PredicateSimplifier.cpp |    6 ++++++
 1 files changed, 6 insertions(+)


Index: llvm/lib/Transforms/Scalar/PredicateSimplifier.cpp
diff -u llvm/lib/Transforms/Scalar/PredicateSimplifier.cpp:1.20 
llvm/lib/Transforms/Scalar/PredicateSimplifier.cpp:1.21
--- llvm/lib/Transforms/Scalar/PredicateSimplifier.cpp:1.20     Wed Oct 11 
21:02:44 2006
+++ llvm/lib/Transforms/Scalar/PredicateSimplifier.cpp  Sun Oct 22 14:53:27 2006
@@ -31,6 +31,7 @@
 #define DEBUG_TYPE "predsimplify"
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
 #include "llvm/Instructions.h"
 #include "llvm/Pass.h"
 #include "llvm/ADT/Statistic.h"
@@ -446,6 +447,7 @@
       void visitBranchInst(BranchInst &BI);
       void visitSwitchInst(SwitchInst &SI);
 
+      void visitAllocaInst(AllocaInst &AI);
       void visitLoadInst(LoadInst &LI);
       void visitStoreInst(StoreInst &SI);
       void visitBinaryOperator(BinaryOperator &BO);
@@ -712,6 +714,10 @@
   }
 }
 
+void PredicateSimplifier::Forwards::visitAllocaInst(AllocaInst &AI) {
+  KP.addNotEqual(Constant::getNullValue(AI.getType()), &AI);
+}
+
 void PredicateSimplifier::Forwards::visitLoadInst(LoadInst &LI) {
   Value *Ptr = LI.getPointerOperand();
   KP.addNotEqual(Constant::getNullValue(Ptr->getType()), Ptr);



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