nvptx: do not assume that crtl->is_leaf is unset

	PR target/78831
	* config/nvptx/nvptx.c (init_softstack_frame): Remove assert.  Compute
	crtl->is_leaf only if unset.  Adjust comment.

From-SVN: r243855

gcc/ChangeLog

-2016-12-22  Andrew Pinski  <apinski@cavium.com>
+2016-12-21  Alexander Monakov  <amonakov@ispras.ru>
 
-        * match.pd (max:c @0 (plus@2 @0 INTEGER_CST@1)): New Pattern.
+	PR target/78831
+	* config/nvptx/nvptx.c (init_softstack_frame): Remove assert.  Compute
+	crtl->is_leaf only if unset.  Adjust comment.
+
+2016-12-21  Andrew Pinski  <apinski@cavium.com>
+
+	* match.pd (max:c @0 (plus@2 @0 INTEGER_CST@1)): New Pattern.
 	(min:c @0 (plus@2 @0 INTEGER_CST@1)) : New Pattern.
 
 2016-12-20  James Greenhalgh  <james.greenhalghj@arm.com>

gcc/config/nvptx/nvptx.c

@@ -1048,9 +1048,10 @@ init_softstack_frame (FILE *file, unsigned alignment, HOST_WIDE_INT size)
 	   bits, reg_stack, reg_frame, size);
 
   /* Usually 'crtl->is_leaf' is computed during register allocator
-     initialization, which is not done on NVPTX.  Compute it now.  */
-  gcc_assert (!crtl->is_leaf);
-  crtl->is_leaf = leaf_function_p ();
+     initialization (which is not done on NVPTX) or for pressure-sensitive
+     optimizations.  Initialize it here, except if already set.  */
+  if (!crtl->is_leaf)
+    crtl->is_leaf = leaf_function_p ();
   if (!crtl->is_leaf)
     fprintf (file, "\t\tst.shared.u%d [%s], %s;\n",
 	     bits, reg_sspslot, reg_stack);