[Hexagon] Defs and clobbers can overlap

llvm-svn: 296365

Author: Krzysztof Parzyszek

llvm/lib/Target/Hexagon/HexagonBlockRanges.cpp

@@ -362,12 +362,11 @@ void HexagonBlockRanges::computeInitialLiveRanges(InstrIndexMap &IndexMap,
           Clobbers.insert(R);
       }
     }
-#ifndef NDEBUG
+    // Defs and clobbers can overlap, e.g.
+    // %D0<def,dead> = COPY %vreg5, %R0<imp-def>, %R1<imp-def>
     for (RegisterRef R : Defs)
-      assert(!Clobbers.count(R));
-    for (RegisterRef R : Clobbers)
-      assert(!Defs.count(R));
-#endif
+      Clobbers.erase(R);
+
     // Update maps for defs.
     for (RegisterRef S : Defs) {
       // Defs should already be expanded into subregs.