Implement constant propogation of shifts
llvm-svn: 2470
diff --git a/llvm/lib/VMCore/ConstantHandling.cpp b/llvm/lib/VMCore/ConstantHandling.cpp
index 5fd11c3..ee7d43e 100644
--- a/llvm/lib/VMCore/ConstantHandling.cpp
+++ b/llvm/lib/VMCore/ConstantHandling.cpp
@@ -56,6 +56,14 @@
const Constant *V2) const {
return SubClassName::Rem((const ArgType *)V1, (const ArgType *)V2);
}
+ virtual Constant *shl(const Constant *V1,
+ const Constant *V2) const {
+ return SubClassName::Shl((const ArgType *)V1, (const ArgType *)V2);
+ }
+ virtual Constant *shr(const Constant *V1,
+ const Constant *V2) const {
+ return SubClassName::Shr((const ArgType *)V1, (const ArgType *)V2);
+ }
virtual ConstantBool *lessthan(const Constant *V1,
const Constant *V2) const {
@@ -122,6 +130,12 @@
inline static Constant *Rem(const ArgType *V1, const ArgType *V2) {
return 0;
}
+ inline static Constant *Shl(const ArgType *V1, const ArgType *V2) {
+ return 0;
+ }
+ inline static Constant *Shr(const ArgType *V1, const ArgType *V2) {
+ return 0;
+ }
inline static ConstantBool *LessThan(const ArgType *V1, const ArgType *V2) {
return 0;
}
@@ -337,6 +351,20 @@
(BuiltinType)V2->getValue();
return ConstantClass::get(*Ty, Result);
}
+
+ inline static Constant *Shl(const ConstantClass *V1,
+ const ConstantClass *V2) {
+ BuiltinType Result = (BuiltinType)V1->getValue() <<
+ (BuiltinType)V2->getValue();
+ return ConstantClass::get(*Ty, Result);
+ }
+
+ inline static Constant *Shr(const ConstantClass *V1,
+ const ConstantClass *V2) {
+ BuiltinType Result = (BuiltinType)V1->getValue() >>
+ (BuiltinType)V2->getValue();
+ return ConstantClass::get(*Ty, Result);
+ }
};