From f902d246b69c972fa3e8f652b44d10abbb1f9355 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Thu, 12 Feb 2009 17:37:15 +0000
Subject: [PATCH] fix PR3538 for PPC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64383 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/PowerPC/PPCISelDAGToDAG.cpp | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
index 051fa8ce0cd..baef8477e53 100644
--- a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+++ b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
@@ -1110,8 +1110,13 @@ SDNode *PPCDAGToDAGISel::Select(SDValue Op) {
     SDValue N1 = N->getOperand(1);
     SDValue N2 = N->getOperand(2);
     FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(N1);
-    if (!FINode)
-      break;
+    
+    // FIXME: We need to handle this for VLAs.
+    if (!FINode) {
+      ReplaceUses(Op.getValue(0), Chain);
+      return NULL;
+    }
+    
     if (N2.getOpcode() == ISD::ADD) {
       if (N2.getOperand(0).getOpcode() == ISD::ADD &&
           N2.getOperand(0).getOperand(0).getOpcode() == PPCISD::GlobalBaseReg &&
@@ -1127,8 +1132,13 @@ SDNode *PPCDAGToDAGISel::Select(SDValue Op) {
                N2.getOperand(1).getOpcode() == PPCISD::Lo)
         N2 = N2.getOperand(0).getOperand(0);
     }
-    if (!isa<GlobalAddressSDNode>(N2))
-      break;
+    
+    // If we don't have a global address here, the debug info is mangled, just
+    // drop it.
+    if (!isa<GlobalAddressSDNode>(N2)) {
+      ReplaceUses(Op.getValue(0), Chain);
+      return NULL;
+    }
     int FI = cast<FrameIndexSDNode>(N1)->getIndex();
     GlobalValue *GV = cast<GlobalAddressSDNode>(N2)->getGlobal();
     SDValue Tmp1 = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy());
-- 
2.34.1