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flow.c: (life_analysis): Mark HARD_FRAME_POINTER_REGNUM as live at the end of the function. 

* flow.c: (life_analysis): Mark HARD_FRAME_POINTER_REGNUM as live at
the end of the function.
(insn_dead_p): Don't delete insns that set the hard frame pointer.
(mark_set_1): Don't add death information about
HARD_FRAME_POINTER_REGNUM.
(mark_used_regs, case REG): Don't put HARD_FRAME_POINTER_REGNUM in
regs_ever_live.  Don't mark it as needed either.
* function.c: (instantiate_virtual_regs_1, case MEM): references to
MEM via the hard frame pointer shouldn't be copied.

From-SVN: r5455
This commit is contained in:
Doug Evans 1993-09-24 19:40:36 +00:00
parent 11c50c5efd
commit 73a187c146
1 changed files with 23 additions and 0 deletions
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gcc/flow.c
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@ -876,6 +876,17 @@ life_analysis (f, nregs)
basic_block_new_live_at_end[n_basic_blocks - 1]
[FRAME_POINTER_REGNUM / REGSET_ELT_BITS]
|= (REGSET_ELT_TYPE) 1 << (FRAME_POINTER_REGNUM % REGSET_ELT_BITS);
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
/* If they are different, also mark the hard frame pointer as live */
basic_block_live_at_end[n_basic_blocks - 1]
[HARD_FRAME_POINTER_REGNUM / REGSET_ELT_BITS]
|= (REGSET_ELT_TYPE) 1 << (HARD_FRAME_POINTER_REGNUM
% REGSET_ELT_BITS);
basic_block_new_live_at_end[n_basic_blocks - 1]
[HARD_FRAME_POINTER_REGNUM / REGSET_ELT_BITS]
|= (REGSET_ELT_TYPE) 1 << (HARD_FRAME_POINTER_REGNUM
% REGSET_ELT_BITS);
#endif
}
/* Mark all global registers as being live at the end of the function
@ -1549,6 +1560,9 @@ insn_dead_p (x, needed, call_ok)
if ((regno < FIRST_PSEUDO_REGISTER && global_regs[regno])
/* Make sure insns to set frame pointer aren't deleted. */
|| regno == FRAME_POINTER_REGNUM
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
|| regno == HARD_FRAME_POINTER_REGNUM
#endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
/* Make sure insns to set arg pointer are never deleted
(if the arg pointer isn't fixed, there will be a USE for
@ -1776,6 +1790,9 @@ mark_set_1 (needed, dead, x, insn, significant)
if (GET_CODE (reg) == REG
&& (regno = REGNO (reg), regno != FRAME_POINTER_REGNUM)
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
&& regno != HARD_FRAME_POINTER_REGNUM
#endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
&& ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
#endif
@ -2176,6 +2193,9 @@ mark_used_regs (needed, live, x, final, insn)
/* For stack ptr or fixed arg pointer,
nothing below can be necessary, so waste no more time. */
if (regno == STACK_POINTER_REGNUM
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
|| regno == HARD_FRAME_POINTER_REGNUM
#endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
|| (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
#endif
@ -2340,6 +2360,9 @@ mark_used_regs (needed, live, x, final, insn)
if (GET_CODE (testreg) == REG
&& (regno = REGNO (testreg), regno != FRAME_POINTER_REGNUM)
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
&& regno != HARD_FRAME_POINTER_REGNUM
#endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
&& ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
#endif