+2003-05-23 Larin Hennessy <larin@science.oregonstate.edu>
+ Zack Weinberg <zack@codesourcery.com>
+
+ * explow.c (allocate_dynamic_stack_space): Remove call to gen_probe.
+ * config/m68k/m68k.c (m68k_output_function_prologue):
+ Remove code under #if NEED_PROBE.
+ * config/m68k/m68k.h: Don't define NEED_PROBE.
+ * config/m68k/m68k.md: Remove "probe" insn.
+ * doc/md.texi: Remove documentation of "probe" pattern.
+
2003-05-23 Dorit Naishlos <gcchaifa@il.ibm.com>
* config/rs6000/rs6000.md (save_fpregs_{si,di}): Add branch attribute.
num_saved_regs++;
}
-#if NEED_PROBE
-#ifdef MOTOROLA
- asm_fprintf (stream, "\ttst.l %d(%Rsp)\n", NEED_PROBE - num_saved_regs * 4);
-#else
- asm_fprintf (stream, "\ttstl %Rsp@(%d)\n", NEED_PROBE - num_saved_regs * 4);
-#endif
-#endif
-
/* If the stack limit is not a symbol, check it here.
This has the disadvantage that it may be too late... */
if (current_function_limit_stack)
makes the stack pointer a smaller address. */
#define STACK_GROWS_DOWNWARD
-/* Nonzero if we need to generate stack-probe insns.
- On most systems they are not needed.
- When they are needed, define this as the stack offset to probe at. */
-#define NEED_PROBE 0
-
/* Define this if the nominal address of the stack frame
is at the high-address end of the local variables;
that is, each additional local variable allocated
""
"nop")
-(define_insn "probe"
- [(reg:SI 15)]
- "NEED_PROBE"
- "*
-{
- operands[0] = plus_constant (stack_pointer_rtx, NEED_PROBE);
- return \"tstl %a0\";
-}")
-
;; Used for frameless functions which save no regs and allocate no locals.
(define_insn "return"
[(return)]
maintaining the back chain. Define this pattern to emit those
operations in addition to updating the stack pointer.
-@cindex @code{probe} instruction pattern
-@item @samp{probe}
-Some machines require instructions to be executed after space is
-allocated from the stack, for example to generate a reference at
-the bottom of the stack.
-
-If you need to emit instructions before the stack has been adjusted,
-put them into the @samp{allocate_stack} pattern. Otherwise, define
-this pattern to emit the required instructions.
-
-No operands are provided.
-
@cindex @code{check_stack} instruction pattern
@item @samp{check_stack}
If stack checking cannot be done on your system by probing the stack with
NULL_RTX, 1);
}
- /* Some systems require a particular insn to refer to the stack
- to make the pages exist. */
-#ifdef HAVE_probe
- if (HAVE_probe)
- emit_insn (gen_probe ());
-#endif
-
/* Record the new stack level for nonlocal gotos. */
if (nonlocal_goto_handler_slots != 0)
emit_stack_save (SAVE_NONLOCAL, &nonlocal_goto_stack_level, NULL_RTX);