[llvm] r239679 - [SelectionDAG] Added assertions + UNDEF handling for BSWAP node creation.

[Simon Pilgrim]

Author: rksimon
Date: Sat Jun 13 10:23:58 2015
New Revision: 239679

URL: http://llvm.org/viewvc/llvm-project?rev=239679&view=rev
Log:
[SelectionDAG] Added assertions + UNDEF handling for BSWAP node creation.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAG.cpp?rev=239679&r1=239678&r2=239679&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAG.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAG.cpp Sat Jun 13 10:23:58 2015
@@ -3082,6 +3082,14 @@ SDValue SelectionDAG::getNode(unsigned O
     if (OpOpcode == ISD::UNDEF)
       return getUNDEF(VT);
     break;
+  case ISD::BSWAP:
+    assert(VT.isInteger() && VT == Operand.getValueType() &&
+           "Invalid BSWAP!");
+    assert((VT.getScalarSizeInBits() % 16 == 0) &&
+           "BSWAP types must be a multiple of 16 bits!");
+    if (OpOpcode == ISD::UNDEF)
+      return getUNDEF(VT);
+    break;
   case ISD::BITCAST:
     // Basic sanity checking.
     assert(VT.getSizeInBits() == Operand.getValueType().getSizeInBits()