From 6b5b29ed7d1fa4c0b2fca8688f43249bec3fdb82 Mon Sep 17 00:00:00 2001
From: Krzysztof Parzyszek <kparzysz@codeaurora.org>
Date: Mon, 27 Feb 2017 18:03:35 +0000
Subject: [PATCH] [Hexagon] Defs and clobbers can overlap

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296365 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Hexagon/HexagonBlockRanges.cpp | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/lib/Target/Hexagon/HexagonBlockRanges.cpp b/lib/Target/Hexagon/HexagonBlockRanges.cpp
index 04621f4f440..721cf041728 100644
--- a/lib/Target/Hexagon/HexagonBlockRanges.cpp
+++ b/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.
-- 
2.50.1