* c-common.c (enum attrs): Add A_NO_LIMIT_STACK.

(init_attributes): Add A_NO_LIMIT_STACK.
(decl_attributes): Handle A_NO_LIMIT_STACK.
* c-decl.c (duplicate_decls): Handle DECL_NO_LIMIT_STACK.
* explow.c (allocate_dynamic_stack_space) [!HAVE_allocate_stack]:
Handle stack bounds checking.
* flags.h (flag_stack_check): Use the word 'probe' rather than
'check', because the flag doesn't actually cause any checking to
be done.
* function.c (expand_function_start): Set
current_function_limit_stack.
* function.h (struct function): Add limit_stack.
(current_function_limit_stack): Define.
* invoke.texi (Code Gen Options): Document new options.
* rtl.h: Declare stack_limit_rtx.
* toplev.c (stack_limit_rtx): New variable.
(decode_f_option): Handle new options -fstack-limit-register=REG,
-fstack-limit-symbol=IDENT, -fno-stack-limit.
(main): Add stack_limit_rtx as GC root.
* tree.h (DECL_NO_LIMIT_STACK): New macro.
(struct tree_decl): New member no_limit_stack.

* config/rs6000/rs6000.c (rs6000_allocate_stack_space): Handle
stack_limit_rtx.
* config/rs6000/rs6000.md (allocate_stack): Handle stack_limit_rtx.
(conditional_trap+1): Get new mnemonic correct.
(conditional_trap+2): New pattern for DImode traps.

* config/m68k/m68k.c (output_function_prologue): Handle
stack_limit_rtx.
* config/m68k/m68k.md (trap): New insn.
(conditional_trap): New insn.
* md.texi (Standard Names): Document `trap' and
`conditional_trap'.
* optabs.c (gen_cond_trap): Use start_sequence()/end_sequence()
so a cc0 setter doesn't get emitted at some random place in the
function.

* config/i960/i960.md (trap): New insn.
(conditional_trap): New expander.
(conditional_trap+1, conditional_trap+2): New insns for signed
and unsigned cases.
* config/i960/i960.c (i960_function_prologue): Use
STARTING_FRAME_OFFSET.  Handle stack_limit_rtx.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@30771 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 28 insertions, 0 deletions

diff --git a/gcc/config/m68k/m68k.md b/gcc/config/m68k/m68k.md
index 8a952590ec5..62177190667 100644
--- a/gcc/config/m68k/m68k.md
+++ b/gcc/config/m68k/m68k.md
@@ -7897,3 +7897,31 @@
 	(unspec:XF [(match_operand:XF 1 "nonimmediate_operand" "fm")] 2))]
   "TARGET_68881 && flag_fast_math"
   "fcos%.x %1,%0")
+
+(define_insn "trap"
+  [(trap_if (const_int -1) (const_int 7))]
+  ""
+  "trap %#7")
+
+(define_insn "conditional_trap"
+  [(trap_if (match_operator 0 "valid_dbcc_comparison_p"
+			    [(cc0) (const_int 0)])
+	    (match_operand:SI 1 "const_int_operand" "I"))]
+  "TARGET_68020 && ! flags_in_68881 ()"
+  "*
+{
+  switch (GET_CODE (operands[0]))
+  {
+  case EQ:  return \"trapeq\";
+  case NE:  return \"trapne\";
+  case GT:  return \"trapgt\";
+  case GTU: return \"traphi\";
+  case LT:  return \"traplt\";
+  case LTU: return \"trapcs\";
+  case GE:  return \"trapge\";
+  case GEU: return \"trapcc\";
+  case LE:  return \"traple\";
+  case LEU: return \"trapls\";
+  default: abort();
+  }
+}")