Hoisted selection variable declaration in InterpBuiltin.cpp

Author: NagrajMG

clang/lib/AST/ByteCode/InterpBuiltin.cpp

@@ -2796,19 +2796,18 @@ static bool interp__builtin_ia32_pshuf(InterpState &S, CodePtr OpPC,
     unsigned LaneBase = (Idx / LaneElts) * LaneElts;
     unsigned LaneIdx = Idx % LaneElts;
     unsigned SrcIdx = Idx;
-
+    unsigned Sel = (Ctl >> (2 * LaneIdx)) & 0x3;
+    
     if (ElemBits == 32) {
-      unsigned Sel = (Ctl >> (2 * LaneIdx)) & 0x3;
       SrcIdx = LaneBase + Sel;
     } else {
       constexpr unsigned HalfSize = 4;
       bool InHigh = LaneIdx >= HalfSize;
       if (!IsShufHW && !InHigh) {
-        unsigned Sel = (Ctl >> (2 * LaneIdx)) & 0x3;
         SrcIdx = LaneBase + Sel;
       } else if (IsShufHW && InHigh) {
         unsigned Rel = LaneIdx - HalfSize;
-        unsigned Sel = (Ctl >> (2 * Rel)) & 0x3;
+        Sel = (Ctl >> (2 * Rel)) & 0x3;
         SrcIdx = LaneBase + HalfSize + Sel;
       }
     }