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re PR target/42240 (wrong epilogue on naked function) 

2011-02-22  Georg-Johann Lay  <avr@gjlay.de>

	PR target/42240
	* config/avr/avr.c (avr_cannot_modify_jumps_p): New function.
	(TARGET_CANNOT_MODIFY_JUMPS_P): Define.

From-SVN: r170534
This commit is contained in:
Georg-Johann Lay 2011-02-27 08:36:55 +00:00 committed by Denis Chertykov
parent e7dc5734a8
commit 6609216ea9
2 changed files with 31 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2011-02-22 Georg-Johann Lay <avr@gjlay.de>
PR target/42240
* config/avr/avr.c (avr_cannot_modify_jumps_p): New function.
(TARGET_CANNOT_MODIFY_JUMPS_P): Define.
2011-02-26 Gerald Pfeifer <gerald@pfeifer.com>
* doc/invoke.texi (ARC Options): Use CPU instead of cpu.

25
gcc/config/avr/avr.c
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@ -73,6 +73,7 @@ static void avr_file_end (void);
static bool avr_legitimate_address_p (enum machine_mode, rtx, bool);
static void avr_asm_function_end_prologue (FILE *);
static void avr_asm_function_begin_epilogue (FILE *);
static bool avr_cannot_modify_jumps_p (void);
static rtx avr_function_value (const_tree, const_tree, bool);
static void avr_insert_attributes (tree, tree *);
static void avr_asm_init_sections (void);
@ -217,6 +218,9 @@ static const struct default_options avr_option_optimization_table[] =
#undef TARGET_OPTION_OPTIMIZATION_TABLE
#define TARGET_OPTION_OPTIMIZATION_TABLE avr_option_optimization_table
#undef TARGET_CANNOT_MODIFY_JUMPS_P
#define TARGET_CANNOT_MODIFY_JUMPS_P avr_cannot_modify_jumps_p
struct gcc_target targetm = TARGET_INITIALIZER;
static void
@ -980,6 +984,27 @@ avr_asm_function_begin_epilogue (FILE *file)
fprintf (file, "/* epilogue start */\n");
}
/* Implement TARGET_CANNOT_MODITY_JUMPS_P */
static bool
avr_cannot_modify_jumps_p (void)
{
/* Naked Functions must not have any instructions after
their epilogue, see PR42240 */
if (reload_completed
&& cfun->machine
&& cfun->machine->is_naked)
{
return true;
}
return false;
}
/* Return nonzero if X (an RTX) is a legitimate memory address on the target
machine for a memory operand of mode MODE. */