re PR other/88007 (ICE in gt_ggc_m_S, at ggc-page.c:1474)

	PR other/88007
	* c-common.c (parse_optimize_options): Allocate option string from
	opts_obstack rather than as GC memory.  Move the allocation after
	warning for invalid option.

	* gcc.dg/pr88007.c: New test.

From-SVN: r266141

gcc/c-family/ChangeLog

+2018-11-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR other/88007
+	* c-common.c (parse_optimize_options): Allocate option string from
+	opts_obstack rather than as GC memory.  Move the allocation after
+	warning for invalid option.
+
 2018-11-13  David Malcolm  <dmalcolm@redhat.com>
 
 	* c-common.c (c_get_substring_location): Update for renaming of

gcc/c-family/c-common.c

@@ -5523,8 +5523,6 @@ parse_optimize_options (tree args, bool attr_p)
 		  next_p = NULL;
 		}
 
-	      r = q = (char *) ggc_alloc_atomic (len2 + 3);
-
 	      /* If the user supplied -Oxxx or -fxxx, only allow -Oxxx or -fxxx
 		 options.  */
 	      if (*p == '-' && p[1] != 'O' && p[1] != 'f')
@@ -5539,6 +5537,9 @@ parse_optimize_options (tree args, bool attr_p)
 		  continue;
 		}
 
+	      /* Can't use GC memory here, see PR88007.  */
+	      r = q = XOBNEWVEC (&opts_obstack, char, len2 + 3);
+
 	      if (*p != '-')
 		{
 		  *r++ = '-';

gcc/testsuite/ChangeLog

 2018-11-14  Jakub Jelinek  <jakub@redhat.com>
 
+	PR other/88007
+	* gcc.dg/pr88007.c: New test.
+
 	PR rtl-optimization/87817
 	* gcc.target/i386/bmi2-bzhi-3.c (main): Add a couple of new tests.
 

gcc/testsuite/gcc.dg/pr88007.c

+/* PR other/88007 */
+/* { dg-do compile } */
+/* { dg-options "--param ggc-min-expand=3 --param ggc-min-heapsize=1024" } */
+/* { dg-skip-if "no code alignment > 2" { "pdp11-*-*" } } */
+
+void bar (void);
+
+__attribute__((optimize ("align-loops=16", "align-jumps=16",
+			 "align-labels=16", "align-functions=16")))
+void
+foo (void)
+{
+  for (int i = 0; i < 1024; ++i)
+    bar ();
+}