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h8300-protos.h: Declare h8300_hard_regno_rename_ok

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* config/h8300/h8300-protos.h: Declare h8300_hard_regno_rename_ok
	* config/h8300/h8300.h (HARD_REGNO_RENAME_OK): New.
	* config/h8300/h8300.c (h8300_hard_regno_rename_ok): New.

From-SVN: r71119
This commit is contained in:
Nitin Yewale 2003-09-05 20:00:03 +00:00 • committed by Kazu Hirata
parent 31ff3e0b77
commit c87ec0bae2
4 changed files with 30 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2003-09-05 Nitin Yewale <NitinY@KPITCummins.com>
* config/h8300/h8300-protos.h: Declare h8300_hard_regno_rename_ok
* config/h8300/h8300.h (HARD_REGNO_RENAME_OK): New.
* config/h8300/h8300.c (h8300_hard_regno_rename_ok): New.
2003-09-05 Roger Sayle <roger@eyesopen.com>
Richard Henderson <rth@redhat.com>

1
gcc/config/h8300/h8300-protos.h
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@ -98,6 +98,7 @@ extern void h8300_expand_prologue (void);
extern void h8300_expand_epilogue (void);
extern int h8300_current_function_interrupt_function_p (void);
extern int h8300_initial_elimination_offset (int, int);
extern int h8300_hard_regno_rename_ok (unsigned int, unsigned int);
struct cpp_reader;
extern void h8300_pr_interrupt (struct cpp_reader *);

17
gcc/config/h8300/h8300.c
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@ -4489,6 +4489,23 @@ same_cmp_preceding_p (rtx i3)
return (INSN_P (i1) && rtx_equal_p (PATTERN (i1), PATTERN (i3))
&& any_condjump_p (i2) && onlyjump_p (i2));
}
/* Return nonzero if register OLD_REG can be renamed to register NEW_REG. */
int
h8300_hard_regno_rename_ok (unsigned int old_reg ATTRIBUTE_UNUSED,
unsigned int new_reg)
{
/* Interrupt functions can only use registers that have already been
saved by the prologue, even if they would normally be
call-clobbered. */
if (h8300_current_function_interrupt_function_p ()
&& !regs_ever_live[new_reg])
return 0;
return 1;
}
/* Initialize the GCC target structure. */
#undef TARGET_ATTRIBUTE_TABLE

6
gcc/config/h8300/h8300.h
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@ -350,6 +350,12 @@ extern int target_flags;
&& ((MODE2) == QImode || (MODE2) == HImode \
|| ((TARGET_H8300H || TARGET_H8300S) && (MODE2) == SImode))))
/* A C expression that is nonzero if hard register NEW_REG can be
considered for use as a rename register for OLD_REG register */
#define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \
h8300_hard_regno_rename_ok (OLD_REG, NEW_REG)
/* Specify the registers used for certain standard purposes.
The values of these macros are register numbers. */