Index: llvm/trunk/lib/DebugInfo/DWARF/DWARFDebugFrame.cpp
===================================================================
--- llvm/trunk/lib/DebugInfo/DWARF/DWARFDebugFrame.cpp
+++ llvm/trunk/lib/DebugInfo/DWARF/DWARFDebugFrame.cpp
@@ -163,6 +163,7 @@
         case DW_CFA_same_value:
         case DW_CFA_def_cfa_register:
         case DW_CFA_def_cfa_offset:
+        case DW_CFA_GNU_args_size:
           // Operands: ULEB128
           addInstruction(Opcode, Data.getULEB128(Offset));
           break;
Index: llvm/trunk/test/tools/llvm-dwarfdump/X86/debug_frame_GNU_args_size.s
===================================================================
--- llvm/trunk/test/tools/llvm-dwarfdump/X86/debug_frame_GNU_args_size.s
+++ llvm/trunk/test/tools/llvm-dwarfdump/X86/debug_frame_GNU_args_size.s
@@ -0,0 +1,15 @@
+# RUN: llvm-mc %s -filetype=obj -triple=i686-pc-linux -o %t
+# RUN: llvm-dwarfdump -v %t | FileCheck %s
+
+# CHECK:      .eh_frame contents:
+# CHECK:        00000018 00000010 0000001c FDE cie=0000001c pc=00000000...00000000
+# CHECK-NEXT:     DW_CFA_GNU_args_size: +16
+# CHECK-NEXT:     DW_CFA_nop:
+
+.text
+.globl foo
+.type  foo,@function
+foo:
+ .cfi_startproc
+ .cfi_escape 0x2e, 0x10
+ .cfi_endproc