[llvm-commits] CVS: llvm/lib/VMCore/Constants.cpp

[Alkis Evlogimenos]

Changes in directory llvm/lib/VMCore:

Constants.cpp updated: 1.108 -> 1.109
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Log message:

Add ConstantExpr::getSizeOf(Type*).


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Diffs of the changes:  (+9 -0)

Index: llvm/lib/VMCore/Constants.cpp
diff -u llvm/lib/VMCore/Constants.cpp:1.108 llvm/lib/VMCore/Constants.cpp:1.109
--- llvm/lib/VMCore/Constants.cpp:1.108	Sat Oct 16 13:07:16 2004
+++ llvm/lib/VMCore/Constants.cpp	Sat Oct 23 20:41:10 2004
@@ -1244,6 +1244,15 @@
   return ConstantExpr::getCast(C, Ty);
 }
 
+Constant *ConstantExpr::getSizeOf(const Type *Ty) {
+  // sizeof is implemented as: (unsigned) gep (Ty)null, 1
+  return getCast(
+    getGetElementPtr(
+      getNullValue(Ty),
+      std::vector<Constant*>(1, ConstantInt::get(Type::UByteTy, 1))),
+    Type::UIntTy);
+}
+
 Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode,
                               Constant *C1, Constant *C2) {
   if (Opcode == Instruction::Shl || Opcode == Instruction::Shr)