[AMDGPU] Fix windows build warning with IMMBitSelConst. NFC.

VS gives this warning for an integer constant:
AMDGPUGenDAGISel.inc(214687): warning C4334: '<<': result of 32-bit
shift implicitly converted to 64 bits (was 64-bit shift intended?)

diff --git a/llvm/lib/Target/AMDGPU/SIInstructions.td b/llvm/lib/Target/AMDGPU/SIInstructions.td
index 02275f1..3f1d10b 100644 (file)
--- a/llvm/lib/Target/AMDGPU/SIInstructions.td
+++ b/llvm/lib/Target/AMDGPU/SIInstructions.td
@@ -2270,7 +2270,7 @@ def : GCNPat <
 >;
 
 def IMMBitSelConst : SDNodeXForm<imm, [{
-  return CurDAG->getTargetConstant(1 << N->getZExtValue(), SDLoc(N),
+  return CurDAG->getTargetConstant(1ULL << N->getZExtValue(), SDLoc(N),
                                    MVT::i32);
 }]>;