[llvm] r201222 - R600: Always implement both versions of isTruncateFree and add a sanity check.

[Benjamin Kramer]

Author: d0k
Date: Wed Feb 12 04:17:54 2014
New Revision: 201222

URL: http://llvm.org/viewvc/llvm-project?rev=201222&view=rev
Log:
R600: Always implement both versions of isTruncateFree and add a sanity check.

Modified:
    llvm/trunk/lib/Target/R600/AMDGPUISelLowering.cpp
    llvm/trunk/lib/Target/R600/AMDGPUISelLowering.h

Modified: llvm/trunk/lib/Target/R600/AMDGPUISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/AMDGPUISelLowering.cpp?rev=201222&r1=201221&r2=201222&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/AMDGPUISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/R600/AMDGPUISelLowering.cpp Wed Feb 12 04:17:54 2014
@@ -232,9 +232,15 @@ bool AMDGPUTargetLowering::isFNegFree(EV
   return VT == MVT::f32;
 }
 
-bool AMDGPUTargetLowering::isTruncateFree(EVT, EVT Dest) const {
+bool AMDGPUTargetLowering::isTruncateFree(EVT Source, EVT Dest) const {
   // Truncate is just accessing a subregister.
-  return (Dest.getSizeInBits() % 32 == 0);
+  return Dest.bitsLT(Source) && (Dest.getSizeInBits() % 32 == 0);
+}
+
+bool AMDGPUTargetLowering::isTruncateFree(Type *Source, Type *Dest) const {
+  // Truncate is just accessing a subregister.
+  return Dest->getPrimitiveSizeInBits() < Source->getPrimitiveSizeInBits() &&
+         (Dest->getPrimitiveSizeInBits() % 32 == 0);
 }
 
 //===---------------------------------------------------------------------===//

Modified: llvm/trunk/lib/Target/R600/AMDGPUISelLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/AMDGPUISelLowering.h?rev=201222&r1=201221&r2=201222&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/AMDGPUISelLowering.h (original)
+++ llvm/trunk/lib/Target/R600/AMDGPUISelLowering.h Wed Feb 12 04:17:54 2014
@@ -79,10 +79,11 @@ protected:
 public:
   AMDGPUTargetLowering(TargetMachine &TM);
 
-  virtual bool isFAbsFree(EVT VT) const;
-  virtual bool isFNegFree(EVT VT) const;
+  virtual bool isFAbsFree(EVT VT) const LLVM_OVERRIDE;
+  virtual bool isFNegFree(EVT VT) const LLVM_OVERRIDE;
   virtual bool isTruncateFree(EVT Src, EVT Dest) const LLVM_OVERRIDE;
-  virtual MVT getVectorIdxTy() const;
+  virtual bool isTruncateFree(Type *Src, Type *Dest) const LLVM_OVERRIDE;
+  virtual MVT getVectorIdxTy() const LLVM_OVERRIDE;
   virtual bool isLoadBitCastBeneficial(EVT, EVT) const LLVM_OVERRIDE;
   virtual SDValue LowerReturn(SDValue Chain, CallingConv::ID CallConv,
                               bool isVarArg,