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Add prototypes for static functions. 

(auto_inc_dec_reg_p): New function.
(regclass): Call it to allow a register needing a secondary reload to be used
for inc/dec if it is already valid for it.

From-SVN: r6461
This commit is contained in:
Richard Kenner 1994-02-01 18:22:21 -05:00
parent 2c3dd6b7bd
commit 08d95f9128
1 changed files with 56 additions and 13 deletions
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69
gcc/regclass.c
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@ -503,10 +503,13 @@ static int loop_depth;
static int loop_cost;
static int copy_cost ();
static void record_reg_classes ();
static void record_address_regs ();
static void record_reg_classes PROTO((int, int, rtx *, enum machine_mode *,
char **, rtx));
static int copy_cost PROTO((rtx, enum machine_mode,
enum reg_class, int));
static void record_address_regs PROTO((rtx, enum reg_class, int));
static auto_inc_dec_reg_p PROTO((rtx, enum machine_mode));
static void reg_scan_mark_refs PROTO((rtx, rtx, int));
/* Return the reg_class in which pseudo reg number REGNO is best allocated.
This function is sometimes called before the info has been computed.
@ -584,16 +587,23 @@ regclass (f, nregs)
if (HARD_REGNO_MODE_OK (j, m))
{
PUT_MODE (r, m);
if (0
/* If a register is not directly suitable for an
auto-increment or decrement addressing mode and
requires secondary reloads, disallow its class from
being used in such addresses. */
if ((0
#ifdef SECONDARY_INPUT_RELOAD_CLASS
|| (SECONDARY_INPUT_RELOAD_CLASS (BASE_REG_CLASS, m, r)
!= NO_REGS)
|| (SECONDARY_INPUT_RELOAD_CLASS (BASE_REG_CLASS, m, r)
!= NO_REGS)
#endif
#ifdef SECONDARY_OUTPUT_RELOAD_CLASS
|| (SECONDARY_OUTPUT_RELOAD_CLASS (BASE_REG_CLASS, m, r)
!= NO_REGS)
|| (SECONDARY_OUTPUT_RELOAD_CLASS (BASE_REG_CLASS, m, r)
!= NO_REGS)
#endif
)
)
&& ! auto_inc_dec_reg_p (r, m))
forbidden_inc_dec_class[i] = 1;
}
}
@ -1478,6 +1488,41 @@ record_address_regs (x, class, scale)
}
}
}
#ifdef FORBIDDEN_INC_DEC_CLASSES
/* Return 1 if REG is valid as an auto-increment memory reference
to an object of MODE. */
static
auto_inc_dec_reg_p (reg, mode)
rtx reg;
enum machine_mode mode;
{
#ifdef HAVE_POST_INCREMENT
if (memory_address_p (mode, gen_rtx (POST_INC, Pmode, reg)))
return 1;
#endif
#ifdef HAVE_POST_DECREMENT
if (memory_address_p (mode, gen_rtx (POST_DEC, Pmode, reg)))
return 1;
#endif
#ifdef HAVE_PRE_INCREMENT
if (memory_address_p (mode, gen_rtx (PRE_INC, Pmode, reg)))
return 1;
#endif
#ifdef HAVE_PRE_DECREMENT
if (memory_address_p (mode, gen_rtx (PRE_DEC, Pmode, reg)))
return 1;
#endif
return 0;
}
#endif
#endif /* REGISTER_CONSTRAINTS */
/* This is the `regscan' pass of the compiler, run just before cse
@ -1516,8 +1561,6 @@ static int highest_regno_in_uid_map;
int max_parallel;
void reg_scan_mark_refs ();
void
reg_scan (f, nregs, repeat)
rtx f;
@ -1565,7 +1608,7 @@ reg_scan (f, nregs, repeat)
/* X is the expression to scan. INSN is the insn it appears in.
NOTE_FLAG is nonzero if X is from INSN's notes rather than its body. */
void
static void
reg_scan_mark_refs (x, insn, note_flag)
rtx x;
rtx insn;