[llvm] r174098 - R600: Consider bitcast when folding const_address node.

[Tom Stellard]

Author: tstellar
Date: Thu Jan 31 16:11:53 2013
New Revision: 174098

URL: http://llvm.org/viewvc/llvm-project?rev=174098&view=rev
Log:
R600: Consider bitcast when folding const_address node.

Patch by: Vincent Lejeune

Reviewed-by: Tom Stellard <thomas.stellard at amd.com>

Modified:
    llvm/trunk/lib/Target/R600/AMDILISelDAGToDAG.cpp
    llvm/trunk/lib/Target/R600/R600ISelLowering.cpp

Modified: llvm/trunk/lib/Target/R600/AMDILISelDAGToDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/AMDILISelDAGToDAG.cpp?rev=174098&r1=174097&r2=174098&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/AMDILISelDAGToDAG.cpp (original)
+++ llvm/trunk/lib/Target/R600/AMDILISelDAGToDAG.cpp Thu Jan 31 16:11:53 2013
@@ -318,6 +318,9 @@ bool AMDGPUDAGToDAGISel::FoldOperands(un
       }
       }
       break;
+    case ISD::BITCAST:
+      Ops[OperandIdx[i] - 1] = Operand.getOperand(0);
+      return true;
     default:
       break;
     }

Modified: llvm/trunk/lib/Target/R600/R600ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/R600ISelLowering.cpp?rev=174098&r1=174097&r2=174098&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/R600ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/R600/R600ISelLowering.cpp Thu Jan 31 16:11:53 2013
@@ -991,6 +991,14 @@ SDValue R600TargetLowering::PerformDAGCo
         return Arg->getOperand(Element);
       }
     }
+    if (Arg.getOpcode() == ISD::BITCAST &&
+        Arg.getOperand(0).getOpcode() == ISD::BUILD_VECTOR) {
+      if (ConstantSDNode *Const = dyn_cast<ConstantSDNode>(N->getOperand(1))) {
+        unsigned Element = Const->getZExtValue();
+        return DAG.getNode(ISD::BITCAST, N->getDebugLoc(), N->getVTList(),
+            Arg->getOperand(0).getOperand(Element));
+      }
+    }
   }
   }
   return SDValue();