* config/i386/i386.c (ix86_expand_prologue): Optimize stack checking for

	* config/i386/i386.c (ix86_expand_prologue): Optimize stack checking for
	leaf functions without dynamic stack allocation.
	* config/ia64/ia64.c (ia64_emit_probe_stack_range): Adjust.
	(ia64_expand_prologue): Likewise.
	* config/mips/mips.c (mips_expand_prologue): Likewise.
	* config/rs6000/rs6000.c (rs6000_emit_prologue): Likewise.
	* config/sparc/sparc.c (sparc_expand_prologue): Likewise.
	(sparc_flat_expand_prologue): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204450 138bc75d-0d04-0410-961f-82ee72b054a4