[llvm-commits] [llvm] r101604 - /llvm/trunk/lib/CodeGen/PostRASchedulerList.cpp

[Bob Wilson]

Author: bwilson
Date: Fri Apr 16 19:49:11 2010
New Revision: 101604

URL: http://llvm.org/viewvc/llvm-project?rev=101604&view=rev
Log:
As a temporary workaround for post-RA not handling DebugValue instructions,
just remove them all.  Radar 7873207 (working around the root problem of
Radar 7759363).

Modified:
    llvm/trunk/lib/CodeGen/PostRASchedulerList.cpp

Modified: llvm/trunk/lib/CodeGen/PostRASchedulerList.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/PostRASchedulerList.cpp?rev=101604&r1=101603&r2=101604&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/PostRASchedulerList.cpp (original)
+++ llvm/trunk/lib/CodeGen/PostRASchedulerList.cpp Fri Apr 16 19:49:11 2010
@@ -265,6 +265,17 @@
     // Initialize register live-range state for scheduling in this block.
     Scheduler.StartBlock(MBB);
 
+    // FIXME: Temporary workaround for <rdar://problem/7759363>: The post-RA
+    // scheduler has some sort of problem with DebugValue instructions that
+    // causes an assertion in LeaksContext.h to fail occasionally.  Just
+    // remove all those instructions for now.
+    for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end();
+         I != E; ) {
+      MachineInstr *MI = &*I++;
+      if (MI->isDebugValue())
+        MI->eraseFromParent();
+    }
+
     // Schedule each sequence of instructions not interrupted by a label
     // or anything else that effectively needs to shut down scheduling.
     MachineBasicBlock::iterator Current = MBB->end();