[committed] Fix ICE in pa_output_function_epilogue

[John David Anglin]

The attached change fixes a segmentation fault that occurs building  
llvm-toolchain-3.4.

Tested on hppa-unknown-linux-gnu.  Committed to trunk, 4.9 and 4.8  
branches.

Dave
--
John David Anglin       dave.ang...@bell.net


2014-09-28  John David Anglin  <dang...@gcc.gnu.org>

        * config/pa/pa.c (pa_output_function_epilogue): Only update
        last_address when a nonnote insn is found.

Index: config/pa/pa.c
===================================================================
--- config/pa/pa.c      (revision 215649)
+++ config/pa/pa.c      (working copy)
@@ -4208,9 +4208,12 @@
     {
       last_address = extra_nop ? 4 : 0;
       insn = get_last_nonnote_insn ();
-      last_address += INSN_ADDRESSES (INSN_UID (insn));
-      if (INSN_P (insn))
-       last_address += insn_default_length (insn);
+      if (insn)
+       {
+         last_address += INSN_ADDRESSES (INSN_UID (insn));
+         if (INSN_P (insn))
+           last_address += insn_default_length (insn);
+       }
       last_address = ((last_address + FUNCTION_BOUNDARY / BITS_PER_UNIT - 1)
                      & ~(FUNCTION_BOUNDARY / BITS_PER_UNIT - 1));
     }