Implement constant propogation of multiply and divide instructions!!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2134 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp
index 80374f339c..5a1cb745a2 100644
--- a/lib/VMCore/ConstantFold.cpp
+++ b/lib/VMCore/ConstantFold.cpp
@@ -47,6 +47,10 @@ class TemplateRules : public ConstRules {
                         const Constant *V2) const { 
     return SubClassName::Mul((const ArgType *)V1, (const ArgType *)V2);  
   }
+  virtual Constant *div(const Constant *V1, 
+                        const Constant *V2) const { 
+    return SubClassName::Div((const ArgType *)V1, (const ArgType *)V2);  
+  }
 
   virtual ConstantBool *lessthan(const Constant *V1, 
                                  const Constant *V2) const { 
@@ -107,6 +111,9 @@ class TemplateRules : public ConstRules {
   inline static Constant *Mul(const ArgType *V1, const ArgType *V2) {
     return 0;
   }
+  inline static Constant *Div(const ArgType *V1, const ArgType *V2) {
+    return 0;
+  }
   inline static ConstantBool *LessThan(const ArgType *V1, const ArgType *V2) {
     return 0;
   }
@@ -263,6 +270,13 @@ struct DirectRules
     return ConstantClass::get(*Ty, Result);
   }
 
+  inline static Constant *Div(const ConstantClass *V1, 
+                              const ConstantClass *V2) {
+    BuiltinType Result = (BuiltinType)V1->getValue() /
+                         (BuiltinType)V2->getValue();
+    return ConstantClass::get(*Ty, Result);
+  }
+
   inline static ConstantBool *LessThan(const ConstantClass *V1, 
                                        const ConstantClass *V2) {
     bool Result = (BuiltinType)V1->getValue() < (BuiltinType)V2->getValue();