re PR middle-end/61141 (c-common.c:1502:1: ICE: in reset_insn_used_flags, at emit-rtl.c:2677)

2014-05-18  John David Anglin  <danglin@gcc.gnu.org>

	PR middle-end/61141
	* emit-rtl.c (reset_all_used_flags): In a sequence, check that
	XVECEXP (pat, 0, i) is an INSN before calling reset_insn_used_flags.
	(verify_rtl_sharing): Likewise.

From-SVN: r211380

gcc/ChangeLog

+2014-05-18  John David Anglin  <danglin@gcc.gnu.org>
+
+	PR middle-end/61141
+	* emit-rtl.c (reset_all_used_flags): In a sequence, check that
+	XVECEXP (pat, 0, i) is an INSN before calling reset_insn_used_flags.
+	(verify_rtl_sharing): Likewise.  
+
 2014-06-09  Marc Glisse  <marc.glisse@inria.fr>
 
 	PR c++/54442

gcc/emit-rtl.c

@@ -2719,7 +2719,11 @@ reset_all_used_flags (void)
 	  {
 	    gcc_assert (REG_NOTES (p) == NULL);
 	    for (int i = 0; i < XVECLEN (pat, 0); i++)
-	      reset_insn_used_flags (XVECEXP (pat, 0, i));
+	      {
+		rtx insn = XVECEXP (pat, 0, i);
+		if (INSN_P (insn))
+		  reset_insn_used_flags (insn);
+	      }
 	  }
       }
 }
@@ -2756,7 +2760,11 @@ verify_rtl_sharing (void)
 	  verify_insn_sharing (p);
 	else
 	  for (int i = 0; i < XVECLEN (pat, 0); i++)
-	    verify_insn_sharing (XVECEXP (pat, 0, i));
+	      {
+		rtx insn = XVECEXP (pat, 0, i);
+		if (INSN_P (insn))
+		  verify_insn_sharing (insn);
+	      }
       }
 
   reset_all_used_flags ();