[llvm-commits] [llvm] r123891 - /llvm/trunk/lib/CodeGen/SimpleRegisterCoalescing.cpp

[Jakob Stoklund Olesen]

Author: stoklund
Date: Thu Jan 20 00:20:02 2011
New Revision: 123891

URL: http://llvm.org/viewvc/llvm-project?rev=123891&view=rev
Log:
Check that a live range exists before shortening it. This fixes PR8989.

The live range may have been deleted earlier because of rematerialization.

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

Modified: llvm/trunk/lib/CodeGen/SimpleRegisterCoalescing.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SimpleRegisterCoalescing.cpp?rev=123891&r1=123890&r2=123891&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SimpleRegisterCoalescing.cpp (original)
+++ llvm/trunk/lib/CodeGen/SimpleRegisterCoalescing.cpp Thu Jan 20 00:20:02 2011
@@ -1685,9 +1685,11 @@
           DoDelete = false;
         
         if (MI->allDefsAreDead()) {
-          LiveInterval &li = li_->getInterval(SrcReg);
-          if (!ShortenDeadCopySrcLiveRange(li, MI))
-            ShortenDeadCopyLiveRange(li, MI);
+          if (li_->hasInterval(SrcReg)) {
+            LiveInterval &li = li_->getInterval(SrcReg);
+            if (!ShortenDeadCopySrcLiveRange(li, MI))
+              ShortenDeadCopyLiveRange(li, MI);
+          }
           DoDelete = true;
         }
         if (!DoDelete) {