From d19e302f7764b4f4920a122671f42ccd78fc98e0 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Fri, 12 Mar 2010 19:18:30 +0000
Subject: Fix llc crash on invalid input.

llvm-svn: 98369
---
 llvm/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'llvm/lib')

diff --git a/llvm/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp b/llvm/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp
index f175907e5d1..8eaeeacd39b 100644
--- a/llvm/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp
+++ b/llvm/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp
@@ -358,6 +358,13 @@ void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
       } else
         printOperand(MI, 0);
     } else {
+      if (MI->getOperand(0).getType()==MachineOperand::MO_Register &&
+          MI->getOperand(0).getReg()==0) {
+        // Suppress offset in this case, it is not meaningful.
+        O << "undef";
+        OutStreamer.AddBlankLine();
+        return;
+      }
       // Frame address.  Currently handles register +- offset only.
       assert(MI->getOperand(0).getType()==MachineOperand::MO_Register);
       assert(MI->getOperand(3).getType()==MachineOperand::MO_Immediate);
-- 
cgit v1.2.3