[compiler-rt] r314878 - [XRay][compiler-rt] Fix logical failure in BufferQueue::getBuffer()

[Dean Michael Berris via llvm-commits]

Author: dberris
Date: Tue Oct  3 23:02:12 2017
New Revision: 314878

URL: http://llvm.org/viewvc/llvm-project?rev=314878&view=rev
Log:
[XRay][compiler-rt] Fix logical failure in BufferQueue::getBuffer()

Follow-up to D38119.

Modified:
    compiler-rt/trunk/lib/xray/xray_buffer_queue.cc

Modified: compiler-rt/trunk/lib/xray/xray_buffer_queue.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/xray/xray_buffer_queue.cc?rev=314878&r1=314877&r2=314878&view=diff
==============================================================================
--- compiler-rt/trunk/lib/xray/xray_buffer_queue.cc (original)
+++ compiler-rt/trunk/lib/xray/xray_buffer_queue.cc Tue Oct  3 23:02:12 2017
@@ -55,7 +55,6 @@ BufferQueue::ErrorCode BufferQueue::getB
   Buf = B;
   ++LiveBuffers;
 
-  First = Next;
   if (++Next == (Buffers.get() + BufferCount))
     Next = Buffers.get();
 
@@ -81,6 +80,7 @@ BufferQueue::ErrorCode BufferQueue::rele
   --LiveBuffers;
   if (++First == (Buffers.get() + BufferCount))
     First = Buffers.get();
+
   return ErrorCode::Ok;
 }