implementing shifting of literal integers

llvm-svn: 21336

2 files changed, 16 insertions, 0 deletions

diff --git a/llvm/utils/TableGen/Record.cpp b/llvm/utils/TableGen/Record.cpp
index 8c8e7b97f7b..d2422ff74b3 100644
--- a/llvm/utils/TableGen/Record.cpp
+++ b/llvm/utils/TableGen/Record.cpp
@@ -297,6 +297,20 @@ Init *BitsInit::resolveReferences(Record &R) {
   return this;
 }
 
+Init *IntInit::getBinaryOp(BinaryOp Op, Init *RHS) {
+  IntInit *RHSi = dynamic_cast<IntInit*>(RHS);
+  if (RHSi == 0) return 0;
+
+  int NewValue;
+  switch (Op) {
+  case SHL: NewValue = Value << RHSi->getValue(); break;
+  case SRA: NewValue = Value >> RHSi->getValue(); break;
+  case SRL: NewValue = (unsigned)Value >> (unsigned)RHSi->getValue(); break;
+  }
+  return new IntInit(NewValue);
+}
+
+
 Init *IntInit::convertInitializerBitRange(const std::vector<unsigned> &Bits) {
   BitsInit *BI = new BitsInit(Bits.size());
 
diff --git a/llvm/utils/TableGen/Record.h b/llvm/utils/TableGen/Record.h
index 9c5166c0cc8..82db72094b3 100644
--- a/llvm/utils/TableGen/Record.h
+++ b/llvm/utils/TableGen/Record.h
@@ -567,6 +567,8 @@ public:
   }
   virtual Init *convertInitializerBitRange(const std::vector<unsigned> &Bits);
 
+  virtual Init *getBinaryOp(BinaryOp Op, Init *RHS);
+
   virtual void print(std::ostream &OS) const { OS << Value; }
 };