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cse.c: (FIXED_REGNO_P): HARD_FRAME_POINTER_REGNUM is fixed.

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* cse.c: (FIXED_REGNO_P): HARD_FRAME_POINTER_REGNUM is fixed.
(CHEAP_REG): HARD_FRAME_POINTER_REGNUM is cheap.
(FIXED_BASE_PLUS): Allow hard frame pointer as base.
(NONZERO_BASE_PLUS_P): Likewise.
(cannon_hash, case REG): Add HARD_FRAME_POINTER_REGNUM to list of
special registers for SMALL_REGISTER_CLASSES.
(find_best_addr): Addresses containing HARD_FRAME_POINTER_REGNUM
cannot be replaced.
(cse_main): value in HARD_FRAME_POINTER_REGNUM is preserved across calls.

From-SVN: r5451
This commit is contained in:
Doug Evans 1993-09-24 19:38:20 +00:00
parent 6d7096b078
commit 8bc169f258
1 changed files with 22 additions and 11 deletions
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29
gcc/cse.c
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@ -440,11 +440,13 @@ struct table_elt
but not if it is an overlapping register. */
#ifdef OVERLAPPING_REGNO_P
#define FIXED_REGNO_P(N) \
(((N) == FRAME_POINTER_REGNUM || fixed_regs[N]) \
(((N) == FRAME_POINTER_REGNUM || (N) == HARD_FRAME_POINTER_REGNUM \
|| fixed_regs[N]) \
&& ! OVERLAPPING_REGNO_P ((N)))
#else
#define FIXED_REGNO_P(N) \
((N) == FRAME_POINTER_REGNUM || fixed_regs[N])
((N) == FRAME_POINTER_REGNUM || (N) == HARD_FRAME_POINTER_REGNUM \
|| fixed_regs[N])
#endif
/* Compute cost of X, as stored in the `cost' field of a table_elt. Fixed
@ -453,8 +455,8 @@ struct table_elt
a cost of 2. Aside from these special cases, call `rtx_cost'. */
#define CHEAP_REG(N) \
((N) == FRAME_POINTER_REGNUM || (N) == STACK_POINTER_REGNUM \
|| (N) == ARG_POINTER_REGNUM \
((N) == FRAME_POINTER_REGNUM || (N) == HARD_FRAME_POINTER_REGNUM \
|| (N) == STACK_POINTER_REGNUM || (N) == ARG_POINTER_REGNUM \
|| ((N) >= FIRST_VIRTUAL_REGISTER && (N) <= LAST_VIRTUAL_REGISTER) \
|| ((N) < FIRST_PSEUDO_REGISTER \
&& FIXED_REGNO_P (N) && REGNO_REG_CLASS (N) != NO_REGS))
@ -554,11 +556,13 @@ struct cse_basic_block_data {
by integrate.c, which is called before virtual register instantiation. */
#define FIXED_BASE_PLUS_P(X) \
((X) == frame_pointer_rtx || (X) == arg_pointer_rtx \
((X) == frame_pointer_rtx || (X) == hard_frame_pointer_rtx \
|| (X) == arg_pointer_rtx \
|| (X) == virtual_stack_vars_rtx \
|| (X) == virtual_incoming_args_rtx \
|| (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == CONST_INT \
&& (XEXP (X, 0) == frame_pointer_rtx \
|| XEXP (X, 0) == hard_frame_pointer_rtx \
|| XEXP (X, 0) == arg_pointer_rtx \
|| XEXP (X, 0) == virtual_stack_vars_rtx \
|| XEXP (X, 0) == virtual_incoming_args_rtx)))
@ -570,11 +574,12 @@ struct cse_basic_block_data {
the i960, the arg pointer is zero when it is unused. */
#define NONZERO_BASE_PLUS_P(X) \
((X) == frame_pointer_rtx \
((X) == frame_pointer_rtx || (X) == hard_frame_pointer_rtx \
|| (X) == virtual_stack_vars_rtx \
|| (X) == virtual_incoming_args_rtx \
|| (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 1)) == CONST_INT \
&& (XEXP (X, 0) == frame_pointer_rtx \
|| XEXP (X, 0) == hard_frame_pointer_rtx \
|| XEXP (X, 0) == arg_pointer_rtx \
|| XEXP (X, 0) == virtual_stack_vars_rtx \
|| XEXP (X, 0) == virtual_incoming_args_rtx)) \
@ -1839,6 +1844,7 @@ canon_hash (x, mode)
#ifdef SMALL_REGISTER_CLASSES
|| (! fixed_regs[regno]
&& regno != FRAME_POINTER_REGNUM
&& regno != HARD_FRAME_POINTER_REGNUM
&& regno != ARG_POINTER_REGNUM
&& regno != STACK_POINTER_REGNUM)
#endif
@ -2510,10 +2516,12 @@ find_best_addr (insn, loc)
&& GET_CODE (XEXP (addr, 0)) == REG
&& GET_CODE (XEXP (addr, 1)) == CONST_INT
&& (regno = REGNO (XEXP (addr, 0)),
regno == FRAME_POINTER_REGNUM || regno == ARG_POINTER_REGNUM))
regno == FRAME_POINTER_REGNUM || regno == HARD_FRAME_POINTER_REGNUM
|| regno == ARG_POINTER_REGNUM))
|| (GET_CODE (addr) == REG
&& (regno = REGNO (addr),
regno == FRAME_POINTER_REGNUM || regno == ARG_POINTER_REGNUM))
&& (regno = REGNO (addr), regno == FRAME_POINTER_REGNUM
|| regno == HARD_FRAME_POINTER_REGNUM
|| regno == ARG_POINTER_REGNUM))
|| CONSTANT_ADDRESS_P (addr))
return;
@ -7805,6 +7813,9 @@ cse_main (f, nregs, after_loop, file)
&& i != STACK_POINTER_REGNUM
&& i != FRAME_POINTER_REGNUM
#if HARD_FRAME_POINTER_REGNUM != FRAME_POINTER_REGNUM
&& i != HARD_FRAME_POINTER_REGNUM
#endif
#if ARG_POINTER_REGNUM != FRAME_POINTER_REGNUM
&& ! (i == ARG_POINTER_REGNUM && fixed_regs[i])
#endif