explow.c (allocate_dynamic_stack_space): Remove call to gen_probe.

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.

Co-Authored-By: Zack Weinberg <zack@codesourcery.com>

From-SVN: r67125

gcc/ChangeLog

+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.

gcc/config/m68k/m68k.c

@@ -519,14 +519,6 @@ m68k_output_function_prologue (stream, size)
         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)

gcc/config/m68k/m68k.h

@@ -671,11 +671,6 @@ enum reg_class {
    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

gcc/config/m68k/m68k.md

@@ -7000,15 +7000,6 @@
   ""
   "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)]

gcc/doc/md.texi

@@ -3270,18 +3270,6 @@ Some machines require other operations such as stack probes or
 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

gcc/explow.c

@@ -1448,13 +1448,6 @@ allocate_dynamic_stack_space (size, target, known_align)
 			    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);