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avr.md: Fix two 0x80000000 constants to make them negative also on 64-bit hosts.

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* config/avr/avr.md: Fix two 0x80000000 constants to make them
	negative also on 64-bit hosts.

	Default to -fno-reorder-blocks when optimizing for size.
	* config/avr/avr-protos.h (avr_optimization_options): Declare.
	* config/avr/avr.c (avr_optimization_options): New function.
	* config/avr/avr.h (OPTIMIZATION_OPTIONS): New.

	Optimize returning from simple functions.
	* config/avr/avr-protos.h (avr_simple_epilogue): Declare.
	* config/avr/avr.c (avr_simple_epilogue): New function.
	* config/avr/avr.md (return): New insn.

From-SVN: r55378
This commit is contained in:
Marek Michalkiewicz 2002-07-10 23:08:41 +02:00 committed by Marek Michalkiewicz
parent 21c318ba4d
commit 126dbce033
5 changed files with 55 additions and 4 deletions
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16
gcc/ChangeLog
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@ -1,3 +1,18 @@
2002-07-10 Marek Michalkiewicz <marekm@amelek.gda.pl>
* config/avr/avr.md: Fix two 0x80000000 constants to make them
negative also on 64-bit hosts.
Default to -fno-reorder-blocks when optimizing for size.
* config/avr/avr-protos.h (avr_optimization_options): Declare.
* config/avr/avr.c (avr_optimization_options): New function.
* config/avr/avr.h (OPTIMIZATION_OPTIONS): New.
Optimize returning from simple functions.
* config/avr/avr-protos.h (avr_simple_epilogue): Declare.
* config/avr/avr.c (avr_simple_epilogue): New function.
* config/avr/avr.md (return): New insn.
2002-07-10 Douglas B Rupp <rupp@gnat.com>
* config/i386/i386.c (ix86_svr3_asm_out_constructor): Add
@ -1213,7 +1228,6 @@ Thu Jun 20 00:26:53 2002 Denis Chertykov <denisc@overta.ru>
at start of buffer.
* gcc.c (trad_capable_cpp): Use cc1 always.
>>>>>>> 1.14808
2002-06-20 Jeffrey Law <law@redhat.com>
* i386.h (TARGET_DEFAULT): Do not turn on frame pointer

2
gcc/config/avr/avr-protos.h
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@ -26,6 +26,7 @@ extern void asm_file_start PARAMS ((FILE *file));
extern void asm_file_end PARAMS ((FILE *file));
extern void avr_init_once PARAMS ((void));
extern void avr_override_options PARAMS ((void));
extern void avr_optimization_options PARAMS ((int level, int size));
extern char * avr_change_section PARAMS ((char *sect_name));
extern int avr_ret_register PARAMS ((void));
extern enum reg_class class_likely_spilled_p PARAMS ((int c));
@ -35,6 +36,7 @@ extern int frame_pointer_required_p PARAMS ((void));
extern void asm_globalize_label PARAMS ((FILE *file, const char *name));
extern void order_regs_for_local_alloc PARAMS ((void));
extern int initial_elimination_offset PARAMS ((int from, int to));
extern int avr_simple_epilogue PARAMS ((void));
extern void progmem_section PARAMS ((void));
extern int mask_one_bit_p PARAMS ((HOST_WIDE_INT mask));
extern void gas_output_limited_string PARAMS ((FILE *file, const char *str));

25
gcc/config/avr/avr.c
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@ -259,6 +259,16 @@ avr_override_options ()
}
void
avr_optimization_options (level, size)
int level ATTRIBUTE_UNUSED;
int size;
{
if (size)
flag_reorder_blocks = 0;
}
/* Initialize TMP_REG_RTX and ZERO_REG_RTX */
void
avr_init_once ()
@ -445,6 +455,21 @@ initial_elimination_offset (from, to)
}
}
/* Return 1 if the function epilogue is just a single "ret". */
int
avr_simple_epilogue ()
{
return (! frame_pointer_needed
&& get_frame_size () == 0
&& avr_regs_to_save (NULL) == 0
&& ! interrupt_function_p (current_function_decl)
&& ! signal_function_p (current_function_decl)
&& ! avr_naked_function_p (current_function_decl)
&& ! MAIN_NAME_P (DECL_NAME (current_function_decl))
&& ! TREE_THIS_VOLATILE (current_function_decl));
}
/* This function checks sequence of live registers */
static int

5
gcc/config/avr/avr.h
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@ -121,7 +121,7 @@ extern int avr_asm_only_p;
fprintf (stderr, " (68k, MIT syntax)");
#endif */
#define OVERRIDE_OPTIONS avr_override_options()
#define OVERRIDE_OPTIONS avr_override_options ()
/* `OVERRIDE_OPTIONS'
Sometimes certain combinations of command options do not make
sense on a particular target machine. You can define a macro
@ -132,6 +132,9 @@ extern int avr_asm_only_p;
Don't use this macro to turn on various extra optimizations for
`-O'. That is what `OPTIMIZATION_OPTIONS' is for. */
#define OPTIMIZATION_OPTIONS(LEVEL, SIZE) \
avr_optimization_options (LEVEL, SIZE)
#define CAN_DEBUG_WITHOUT_FP
/* Define this macro if debugging can be performed even without a
frame pointer. If this macro is defined, GNU CC will turn on the

11
gcc/config/avr/avr.md
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@ -1966,7 +1966,7 @@
(const_int 0))
(label_ref (match_dup 1))
(pc)))]
"operands[2] = GEN_INT (0x80000000);")
"operands[2] = GEN_INT (-2147483647 - 1);")
(define_peephole2
[(set (cc0) (match_operand:SI 0 "register_operand" ""))
@ -1978,7 +1978,7 @@
(const_int 0))
(label_ref (match_dup 1))
(pc)))]
"operands[2] = GEN_INT (0x80000000);")
"operands[2] = GEN_INT (-2147483647 - 1);")
;; ************************************************************************
;; Implementation of conditional jumps here.
@ -2143,6 +2143,13 @@
(const_int 2)
(const_int 1))])])
(define_insn "return"
[(return)]
"reload_completed && avr_simple_epilogue ()"
"ret"
[(set_attr "cc" "none")
(set_attr "length" "1")])
(define_insn "nop"
[(const_int 0)]
""