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flow.c (mark_regs_live_at_end, [...]): Only give FRAME_POINTER_REGNUM and HARD_FRAME_POINTER_REGNUM special treatment...

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* flow.c (mark_regs_live_at_end, insn_dead_p,
	mark_set_1, mark_used_regs): Only give FRAME_POINTER_REGNUM
	and HARD_FRAME_POINTER_REGNUM special treatment if reload
	hasn't run or the frame pointer is needed.
	* haifa-sched.c (attach_deaths): Likewise.
	* sched.c (attach_deaths): Likewise.

From-SVN: r27276
This commit is contained in:
John Wehle 1999-05-31 08:43:04 +00:00 committed by John Wehle
parent b2d352ba5a
commit e4b8a413b1
4 changed files with 47 additions and 21 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
Mon May 31 11:40:20 EDT 1999 John Wehle (john@feith.com)
* flow.c (mark_regs_live_at_end, insn_dead_p,
mark_set_1, mark_used_regs): Only give FRAME_POINTER_REGNUM
and HARD_FRAME_POINTER_REGNUM special treatment if reload
hasn't run or the frame pointer is needed.
* haifa-sched.c (attach_deaths): Likewise.
* sched.c (attach_deaths): Likewise.
Mon May 31 00:46:17 1999 Jeffrey A Law (law@cygnus.com) Mon May 31 00:46:17 1999 Jeffrey A Law (law@cygnus.com)
* configure.in (native gas tests): Search for an assembler in the * configure.in (native gas tests): Search for an assembler in the

33
gcc/flow.c
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@ -2272,11 +2272,14 @@ mark_regs_live_at_end (set)
we end up eliminating it, it will be removed from the live list we end up eliminating it, it will be removed from the live list
of each basic block by reload. */ of each basic block by reload. */
SET_REGNO_REG_SET (set, FRAME_POINTER_REGNUM); if (! reload_completed || frame_pointer_needed)
{
SET_REGNO_REG_SET (set, FRAME_POINTER_REGNUM);
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM #if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
/* If they are different, also mark the hard frame pointer as live */ /* If they are different, also mark the hard frame pointer as live */
SET_REGNO_REG_SET (set, HARD_FRAME_POINTER_REGNUM); SET_REGNO_REG_SET (set, HARD_FRAME_POINTER_REGNUM);
#endif #endif
}
/* Mark all global registers, and all registers used by the epilogue /* Mark all global registers, and all registers used by the epilogue
as being live at the end of the function since they may be as being live at the end of the function since they may be
@ -2957,9 +2960,11 @@ insn_dead_p (x, needed, call_ok, notes)
/* Don't delete insns to set global regs. */ /* Don't delete insns to set global regs. */
if ((regno < FIRST_PSEUDO_REGISTER && global_regs[regno]) if ((regno < FIRST_PSEUDO_REGISTER && global_regs[regno])
/* Make sure insns to set frame pointer aren't deleted. */ /* Make sure insns to set frame pointer aren't deleted. */
|| regno == FRAME_POINTER_REGNUM || (regno == FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM #if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
|| regno == HARD_FRAME_POINTER_REGNUM || (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif #endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
/* Make sure insns to set arg pointer are never deleted /* Make sure insns to set arg pointer are never deleted
@ -3268,9 +3273,11 @@ mark_set_1 (needed, dead, x, insn, significant)
mem_set_list = gen_rtx_EXPR_LIST (VOIDmode, reg, mem_set_list); mem_set_list = gen_rtx_EXPR_LIST (VOIDmode, reg, mem_set_list);
if (GET_CODE (reg) == REG if (GET_CODE (reg) == REG
&& (regno = REGNO (reg), regno != FRAME_POINTER_REGNUM) && (regno = REGNO (reg), ! (regno == FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed)))
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM #if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
&& regno != HARD_FRAME_POINTER_REGNUM && ! (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif #endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
&& ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno]) && ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
@ -3728,12 +3735,14 @@ mark_used_regs (needed, live, x, final, insn)
nothing below can be necessary, so waste no more time. */ nothing below can be necessary, so waste no more time. */
if (regno == STACK_POINTER_REGNUM if (regno == STACK_POINTER_REGNUM
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM #if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
|| regno == HARD_FRAME_POINTER_REGNUM || (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif #endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
|| (regno == ARG_POINTER_REGNUM && fixed_regs[regno]) || (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
#endif #endif
|| regno == FRAME_POINTER_REGNUM) || (regno == FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed)))
{ {
/* If this is a register we are going to try to eliminate, /* If this is a register we are going to try to eliminate,
don't mark it live here. If we are successful in don't mark it live here. If we are successful in
@ -3909,9 +3918,11 @@ mark_used_regs (needed, live, x, final, insn)
if ((GET_CODE (testreg) == PARALLEL if ((GET_CODE (testreg) == PARALLEL
&& GET_MODE (testreg) == BLKmode) && GET_MODE (testreg) == BLKmode)
|| (GET_CODE (testreg) == REG || (GET_CODE (testreg) == REG
&& (regno = REGNO (testreg), regno != FRAME_POINTER_REGNUM) && (regno = REGNO (testreg), ! (regno == FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed)))
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM #if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
&& regno != HARD_FRAME_POINTER_REGNUM && ! (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif #endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
&& ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno]) && ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])

13
gcc/haifa-sched.c
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@ -4630,12 +4630,15 @@ attach_deaths (x, insn, set_p)
if (regno >= FIRST_PSEUDO_REGISTER || ! global_regs[regno]) if (regno >= FIRST_PSEUDO_REGISTER || ! global_regs[regno])
{ {
/* Never add REG_DEAD notes for the FRAME_POINTER_REGNUM or the /* Never add REG_DEAD notes for STACK_POINTER_REGNUM
STACK_POINTER_REGNUM, since these are always considered to be since it's always considered to be live. Similarly
live. Similarly for ARG_POINTER_REGNUM if it is fixed. */ for FRAME_POINTER_REGNUM if a frame pointer is needed
if (regno != FRAME_POINTER_REGNUM and for ARG_POINTER_REGNUM if it is fixed. */
if (! (regno == FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#if HARD_FRAME_POINTER_REGNUM != FRAME_POINTER_REGNUM #if HARD_FRAME_POINTER_REGNUM != FRAME_POINTER_REGNUM
&& ! (regno == HARD_FRAME_POINTER_REGNUM) && ! (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif #endif
#if ARG_POINTER_REGNUM != FRAME_POINTER_REGNUM #if ARG_POINTER_REGNUM != FRAME_POINTER_REGNUM
&& ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno]) && ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])

13
gcc/sched.c
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@ -2309,12 +2309,15 @@ attach_deaths (x, insn, set_p)
if (regno >= FIRST_PSEUDO_REGISTER || ! global_regs[regno]) if (regno >= FIRST_PSEUDO_REGISTER || ! global_regs[regno])
{ {
/* Never add REG_DEAD notes for the FRAME_POINTER_REGNUM or the /* Never add REG_DEAD notes for STACK_POINTER_REGNUM
STACK_POINTER_REGNUM, since these are always considered to be since it's always considered to be live. Similarly
live. Similarly for ARG_POINTER_REGNUM if it is fixed. */ for FRAME_POINTER_REGNUM if a frame pointer is needed
if (regno != FRAME_POINTER_REGNUM and for ARG_POINTER_REGNUM if it is fixed. */
if (! (regno == FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#if HARD_FRAME_POINTER_REGNUM != FRAME_POINTER_REGNUM #if HARD_FRAME_POINTER_REGNUM != FRAME_POINTER_REGNUM
&& ! (regno == HARD_FRAME_POINTER_REGNUM) && ! (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif #endif
#if ARG_POINTER_REGNUM != FRAME_POINTER_REGNUM #if ARG_POINTER_REGNUM != FRAME_POINTER_REGNUM
&& ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno]) && ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])