re PR regression/59923 (ICE in maybe_record_trace_start, at dwarf2cfi.c:2239…

re PR regression/59923 (ICE in maybe_record_trace_start, at dwarf2cfi.c:2239 with -mcpu=cortex-a15 -mthumb -O2 -fvisibility=hidden -g)

	PR target/59923
	* ifcvt.c (cond_exec_process_insns): Don't conditionalize
	frame related instructions.

	* gcc.target/arm/pr59923.c: New test.

From-SVN: r207324

gcc/ChangeLog

+2014-01-30  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/59923
+	* ifcvt.c (cond_exec_process_insns): Don't conditionalize
+	frame related instructions.
+
 2014-01-30  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR rtl-optimization/59959

gcc/ifcvt.c

@@ -338,6 +338,10 @@ cond_exec_process_insns (ce_if_block *ce_info ATTRIBUTE_UNUSED,
 
       gcc_assert (NONJUMP_INSN_P (insn) || CALL_P (insn));
 
+      /* dwarf2out can't coope with conditional unwind info.  */
+      if (RTX_FRAME_RELATED_P (insn))
+	return FALSE;
+
       /* Remove USE insns that get in the way.  */
       if (reload_completed && GET_CODE (PATTERN (insn)) == USE)
 	{

gcc/testsuite/ChangeLog

+2014-01-30  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/59923
+	* gcc.target/arm/pr59923.c: New test.
+
 2014-01-30  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
 
 	* gcc.dg/vmx/splat.c: New.

gcc/testsuite/gcc.target/arm/pr59923.c

+/* PR target/59923 */
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_thumb2_ok } */
+/* { dg-options "-O2 -mcpu=cortex-a15 -fno-strict-aliasing -mthumb -g" } */
+
+struct S
+{
+  void *s;
+  struct T { unsigned short a; unsigned char b[4], c[4]; } *t;
+} s;
+void bar (void *);
+
+void
+foo (struct S *x, int *y)
+{
+  if (*y > 0)
+    return;
+  else if (x->t->b[0] == 0x43 && x->t->b[1] == 0x6d && x->t->c[0] == 1)
+    x->s = &s;
+  else
+    *y = 16384;
+  if (*y > 0)
+    bar (x);
+}