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| author | John Wehle <john@feith.com> | 1999-05-31 08:43:04 +0000 |
|---|---|---|
| committer | John Wehle <wehle@gcc.gnu.org> | 1999-05-31 08:43:04 +0000 |
| commit | e4b8a413b1f92a8b7106b642227f830c58351f86 (patch) | |
| tree | 78c2d352fc235963ecbb33a4a29bd39217e6aca8 /gcc/flow.c | |
| parent | b2d352ba5a352660e9bee9c31a92c1bce9e3f27f (diff) | |
| download | gcc-e4b8a413b1f92a8b7106b642227f830c58351f86.zip gcc-e4b8a413b1f92a8b7106b642227f830c58351f86.tar.gz gcc-e4b8a413b1f92a8b7106b642227f830c58351f86.tar.bz2 | |
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
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 33 |
1 files changed, 22 insertions, 11 deletions
@@ -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]) |