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riscv-gcc-1
Commit e4b8a413 by John Wehle Committed by John Wehle
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flow.c (mark_regs_live_at_end, [...]): Only give FRAME_POINTER_REGNUM and… 

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

	* 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
parent b2d352ba
Showing with 47 additions and 21 deletions
gcc/ChangeLog
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)
* configure.in (native gas tests): Search for an assembler in the
......
gcc/flow.c
......@@ -2272,11 +2272,14 @@ mark_regs_live_at_end (set)
we end up eliminating it, it will be removed from the live list
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 they are different, also mark the hard frame pointer as live */
SET_REGNO_REG_SET (set, HARD_FRAME_POINTER_REGNUM);
/* If they are different, also mark the hard frame pointer as live */
SET_REGNO_REG_SET (set, HARD_FRAME_POINTER_REGNUM);
#endif
}
/* Mark all global registers, and all registers used by the epilogue
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. */
if ((regno < FIRST_PSEUDO_REGISTER && global_regs[regno])
/* 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
|| regno == HARD_FRAME_POINTER_REGNUM
|| (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
/* 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);
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
&& regno != HARD_FRAME_POINTER_REGNUM
&& ! (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
&& ! (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. */
if (regno == STACK_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
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
|| (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
#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,
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
&& GET_MODE (testreg) == BLKmode)
|| (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
&& regno != HARD_FRAME_POINTER_REGNUM
&& ! (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
&& ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
......
gcc/haifa-sched.c
......@@ -4630,12 +4630,15 @@ attach_deaths (x, insn, set_p)
if (regno >= FIRST_PSEUDO_REGISTER || ! global_regs[regno])
{
/* Never add REG_DEAD notes for the FRAME_POINTER_REGNUM or the
STACK_POINTER_REGNUM, since these are always considered to be
live. Similarly for ARG_POINTER_REGNUM if it is fixed. */
if (regno != FRAME_POINTER_REGNUM
/* Never add REG_DEAD notes for STACK_POINTER_REGNUM
since it's always considered to be live. Similarly
for FRAME_POINTER_REGNUM if a frame pointer is needed
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
&& ! (regno == HARD_FRAME_POINTER_REGNUM)
&& ! (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif
#if ARG_POINTER_REGNUM != FRAME_POINTER_REGNUM
&& ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
......
gcc/sched.c
......@@ -2309,12 +2309,15 @@ attach_deaths (x, insn, set_p)
if (regno >= FIRST_PSEUDO_REGISTER || ! global_regs[regno])
{
/* Never add REG_DEAD notes for the FRAME_POINTER_REGNUM or the
STACK_POINTER_REGNUM, since these are always considered to be
live. Similarly for ARG_POINTER_REGNUM if it is fixed. */
if (regno != FRAME_POINTER_REGNUM
/* Never add REG_DEAD notes for STACK_POINTER_REGNUM
since it's always considered to be live. Similarly
for FRAME_POINTER_REGNUM if a frame pointer is needed
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
&& ! (regno == HARD_FRAME_POINTER_REGNUM)
&& ! (regno == HARD_FRAME_POINTER_REGNUM
&& (! reload_completed || frame_pointer_needed))
#endif
#if ARG_POINTER_REGNUM != FRAME_POINTER_REGNUM
&& ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
......
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