From: Devang Patel <dpatel@apple.com>
Date: Fri, 6 Aug 2010 00:26:18 +0000 (+0000)
Subject: While emitting DBG_VALUE for registers spilled at the end of a block do not use locat... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=31defcf2349916ac759be33baaa4060703fd78df;p=oota-llvm.git

While emitting DBG_VALUE for registers spilled at the end of a block do not use location of MBB->end(). If a block does not have terminator then incoming iterator points to end().



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110411 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/RegAllocFast.cpp b/lib/CodeGen/RegAllocFast.cpp
index 9567308aa73..9dff74b5dd9 100644
--- a/lib/CodeGen/RegAllocFast.cpp
+++ b/lib/CodeGen/RegAllocFast.cpp
@@ -277,7 +277,14 @@ void RAFast::spillVirtReg(MachineBasicBlock::iterator MI,
       int64_t Offset = 0;
       if (DBG->getOperand(1).isImm())
         Offset = DBG->getOperand(1).getImm();
-      DebugLoc DL = MI->getDebugLoc();
+      DebugLoc DL;
+      if (MI == MBB->end()) {
+        // If MI is at basic block end then use last instruction's location.
+        MachineBasicBlock::iterator EI = MI;
+        DL = (--EI)->getDebugLoc();
+      }
+      else
+        DL = MI->getDebugLoc();
       if (MachineInstr *NewDV = 
           TII->emitFrameIndexDebugValue(*MF, FI, Offset, MDPtr, DL)) {
         MachineBasicBlock *MBB = DBG->getParent();