re PR target/79749 (Many sparc testcases FAIL at -O0 with -fomit-frame-pointer)

	PR target/79749
	* config/sparc/sparc.c (sparc_frame_pointer_required): Add missing
	condition on optimize for the leaf function test.

From-SVN: r245791

gcc/ChangeLog

+2017-02-28  Eric Botcazou  <ebotcazou@adacore.com>
+
+	PR target/79749
+	* config/sparc/sparc.c (sparc_frame_pointer_required): Add missing
+	condition on optimize for the leaf function test.
+
 2017-02-28  Martin Liska  <mliska@suse.cz>
 
 	PR lto/79625

gcc/config/sparc/sparc.c

@@ -12180,8 +12180,9 @@ sparc_frame_pointer_required (void)
   if (TARGET_FLAT)
     return false;
 
-  /* Otherwise, the frame pointer is required if the function isn't leaf.  */
-  return !(crtl->is_leaf && only_leaf_regs_used ());
+  /* Otherwise, the frame pointer is required if the function isn't leaf, but
+     we cannot use sparc_leaf_function_p since it hasn't been computed yet.  */
+  return !(optimize > 0 && crtl->is_leaf && only_leaf_regs_used ());
 }
 
 /* The way this is structured, we can't eliminate SFP in favor of SP

gcc/testsuite/ChangeLog

+2017-02-28  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gcc.target/sparc/20170228-1.c: New test.
+
 2017-02-28  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.target/i386/invsize-1.c: New test.

gcc/testsuite/gcc.target/sparc/20170228-1.c

+/* PR target/79749 */
+/* Reported by Rainer Orth <ro@gcc.gnu.org> */
+
+/* { dg-do run } */
+/* { dg-options "-fomit-frame-pointer" } */
+
+extern void abort (void);
+
+int foo (int x1, int x2, int x3, int x4, int x5, int x6, int x7)
+{
+  return x7;
+}
+
+int main (void)
+{
+  if (foo (100, 200, 300, 400, 500, 600, 700) != 700)
+    abort ();
+
+  return 0;
+}