* config/i386/i386.c (ix86_expand_prologue): Tighten assert

	for int_registers_saved.

diff -rup a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c

--- a/gcc/config/i386/i386.c	2017-11-03 10:39:24.585633524 -0600

+++ b/gcc/config/i386/i386.c	2017-11-03 10:41:10.654774032 -0600

@@ -10686,8 +10686,12 @@ ix86_expand_prologue (void)

       && (flag_stack_check == STATIC_BUILTIN_STACK_CHECK

 	  || flag_stack_clash_protection))

     {

-      /* We expect the registers to be saved when probes are used.  */

-      gcc_assert (int_registers_saved);

+      /* This assert wants to verify that integer registers were saved

+	 prior to probing.  This is necessary when probing may be implemented

+	 as a function call (Windows).  It is not necessary for stack clash

+	 protection probing.  */

+      if (!flag_stack_clash_protection)

+	gcc_assert (int_registers_saved);

       if (flag_stack_clash_protection)

 	{