Bug fix. ~1U marks the val# dead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40975 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp
index cead5e5240e360b6d5a13e29381910bc40936405..0b3d17823a2d473054814f3c3d4ad58705317aaa 100644 (file)
--- a/lib/CodeGen/SimpleRegisterCoalescing.cpp
+++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp
@@ -645,7 +645,7 @@ bool SimpleRegisterCoalescing::JoinIntervals(LiveInterval &LHS, LiveInterval &RH
           // Otherwise, use the specified value #.
           LHSValNoAssignments[VN] = RHSValID;
           if (VN != (unsigned)RHSValID)
-            ValueNumberInfo[VN].def = RHSValNoInfo.def;
+            ValueNumberInfo[VN]->def = ~1U;  // Now this val# is dead.
           else
             ValueNumberInfo[VN] = RHSValNoInfo;
         }