[llvm-commits] [llvm] r172957 - /llvm/trunk/include/llvm/IR/IRBuilder.h

[Michael Gottesman]

Author: mgottesman
Date: Sat Jan 19 21:56:31 2013
New Revision: 172957

URL: http://llvm.org/viewvc/llvm-project?rev=172957&view=rev
Log:
Added IRBuilder::CreateFPExtOrFPTrunc.

This method serves an analogous purpose to CreateZExtOrTrunc/CreateSExtOrTrunc
but for floating point types.

In detail, it provides a manner when one is handling conversions of floating
point types of automatically selecting fpext, fptrunc, or identity depending on
the relative bitsize of the source and destination types.

Modified:
    llvm/trunk/include/llvm/IR/IRBuilder.h

Modified: llvm/trunk/include/llvm/IR/IRBuilder.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/IRBuilder.h?rev=172957&r1=172956&r2=172957&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/IRBuilder.h (original)
+++ llvm/trunk/include/llvm/IR/IRBuilder.h Sat Jan 19 21:56:31 2013
@@ -1048,6 +1048,20 @@
       return CreateTrunc(V, DestTy, Name);
     return V;
   }
+  /// CreateFPExtOrFPTrunc - Create a FPExt or FPTrunc from the float value V to
+  /// DestTy. Return the value untouched if the type of V is already DestTy.
+  Value *CreateFPExtOrFPTrunc(Value *V, Type *DestTy,
+                           const Twine &Name = "") {
+    assert(V->getType()->isFPOrFPVectorTy() &&
+           DestTy->isFPOrFPVectorTy() &&
+           "Can only FPExt/FPTrunc floating point types!");
+    Type *Ty = V->getType();
+    if (Ty->getScalarSizeInBits() < DestTy->getScalarSizeInBits())
+      return CreateFPExt(V, DestTy, Name);
+    if (Ty->getScalarSizeInBits() > DestTy->getScalarSizeInBits())
+      return CreateFPTrunc(V, DestTy, Name);
+    return V;
+  }
   Value *CreateFPToUI(Value *V, Type *DestTy, const Twine &Name = ""){
     return CreateCast(Instruction::FPToUI, V, DestTy, Name);
   }