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rs6000.c (rs6000_frame_related): Don't emit a REG_FRAME_RELATED_EXPR note when...

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* config/rs6000/rs6000.c (rs6000_frame_related): Don't emit a
	REG_FRAME_RELATED_EXPR note when the instruction exactly matches
	the replacement.
	(emit_frame_save): Delete frame_ptr param.  Rename total_size to
	frame_reg_to_sp.
	(rs6000_emit_prologue): Add sp_off.  Update rs6000_frame_related
	and emit_frame_save calls.  Cope with possibly missing note.

From-SVN: r186796
This commit is contained in:
Alan Modra 2012-04-25 11:42:12 +09:30 committed by Alan Modra
parent ad491329d9
commit 471df90fad
2 changed files with 70 additions and 27 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
2012-04-25 Alan Modra <amodra@gmail.com>
* config/rs6000/rs6000.c (rs6000_frame_related): Don't emit a
REG_FRAME_RELATED_EXPR note when the instruction exactly matches
the replacement.
(emit_frame_save): Delete frame_ptr param. Rename total_size to
frame_reg_to_sp.
(rs6000_emit_prologue): Add sp_off. Update rs6000_frame_related
and emit_frame_save calls. Cope with possibly missing note.
2012-04-24 Sriraman Tallam <tmsriram@google.com>
* config/i386/i386.c (build_processor_model_struct): New function.

87
gcc/config/rs6000/rs6000.c
View File

@ -18752,7 +18752,10 @@ output_probe_stack_range (rtx reg1, rtx reg2)
with (plus:P (reg 1) VAL), and with REG2 replaced with RREG if REG2
is not NULL. It would be nice if dwarf2out_frame_debug_expr could
deduce these equivalences by itself so it wasn't necessary to hold
its hand so much. */
its hand so much. Don't be tempted to always supply d2_f_d_e with
the actual cfa register, ie. r31 when we are using a hard frame
pointer. That fails when saving regs off r1, and sched moves the
r31 setup past the reg saves. */
static rtx
rs6000_frame_related (rtx insn, rtx reg, HOST_WIDE_INT val,
@ -18760,6 +18763,25 @@ rs6000_frame_related (rtx insn, rtx reg, HOST_WIDE_INT val,
{
rtx real, temp;
if (REGNO (reg) == STACK_POINTER_REGNUM && reg2 == NULL_RTX)
{
/* No need for any replacement. Just set RTX_FRAME_RELATED_P. */
int i;
gcc_checking_assert (val == 0);
real = PATTERN (insn);
if (GET_CODE (real) == PARALLEL)
for (i = 0; i < XVECLEN (real, 0); i++)
if (GET_CODE (XVECEXP (real, 0, i)) == SET)
{
rtx set = XVECEXP (real, 0, i);
RTX_FRAME_RELATED_P (set) = 1;
}
RTX_FRAME_RELATED_P (insn) = 1;
return insn;
}
/* copy_rtx will not make unique copies of registers, so we need to
ensure we don't have unwanted sharing here. */
if (reg == reg2)
@ -18773,10 +18795,13 @@ rs6000_frame_related (rtx insn, rtx reg, HOST_WIDE_INT val,
if (reg2 != NULL_RTX)
real = replace_rtx (real, reg2, rreg);
real = replace_rtx (real, reg,
gen_rtx_PLUS (Pmode, gen_rtx_REG (Pmode,
STACK_POINTER_REGNUM),
GEN_INT (val)));
if (REGNO (reg) == STACK_POINTER_REGNUM)
gcc_checking_assert (val == 0);
else
real = replace_rtx (real, reg,
gen_rtx_PLUS (Pmode, gen_rtx_REG (Pmode,
STACK_POINTER_REGNUM),
GEN_INT (val)));
/* We expect that 'real' is either a SET or a PARALLEL containing
SETs (and possibly other stuff). In a PARALLEL, all the SETs
@ -18894,8 +18919,8 @@ generate_set_vrsave (rtx reg, rs6000_stack_t *info, int epiloguep)
Save REGNO into [FRAME_REG + OFFSET] in mode MODE. */
static rtx
emit_frame_save (rtx frame_reg, rtx frame_ptr, enum machine_mode mode,
unsigned int regno, int offset, HOST_WIDE_INT total_size)
emit_frame_save (rtx frame_reg, enum machine_mode mode,
unsigned int regno, int offset, HOST_WIDE_INT frame_reg_to_sp)
{
rtx reg, offset_rtx, insn, mem, addr, int_rtx;
rtx replacea, replaceb;
@ -18931,7 +18956,8 @@ emit_frame_save (rtx frame_reg, rtx frame_ptr, enum machine_mode mode,
insn = emit_move_insn (mem, reg);
return rs6000_frame_related (insn, frame_ptr, total_size, replacea, replaceb);
return rs6000_frame_related (insn, frame_reg, frame_reg_to_sp,
replacea, replaceb);
}
/* Emit an offset memory reference suitable for a frame store, while
@ -19296,7 +19322,9 @@ rs6000_emit_prologue (void)
int using_static_chain_p = (cfun->static_chain_decl != NULL_TREE
&& df_regs_ever_live_p (STATIC_CHAIN_REGNUM)
&& call_used_regs[STATIC_CHAIN_REGNUM]);
/* Offset to top of frame for frame_reg and sp respectively. */
HOST_WIDE_INT frame_off = 0;
HOST_WIDE_INT sp_off = 0;
if (flag_stack_usage_info)
current_function_static_stack_size = info->total_size;
@ -19437,9 +19465,9 @@ rs6000_emit_prologue (void)
}
insn = emit_insn (gen_rtx_PARALLEL (VOIDmode, p));
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
rs6000_frame_related (insn, frame_reg_rtx, sp_off - frame_off,
treg, GEN_INT (-info->total_size));
frame_off = info->total_size;
sp_off = frame_off = info->total_size;
}
strategy = info->savres_strategy;
@ -19484,6 +19512,7 @@ rs6000_emit_prologue (void)
frame_off = info->total_size;
}
rs6000_emit_allocate_stack (info->total_size, copy_reg);
sp_off = info->total_size;
if (frame_reg_rtx != sp_reg_rtx)
rs6000_emit_stack_tie (frame_reg_rtx, false);
}
@ -19508,7 +19537,7 @@ rs6000_emit_prologue (void)
__builtin_return_address. */
insn = emit_move_insn (mem, reg);
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
rs6000_frame_related (insn, frame_reg_rtx, sp_off - frame_off,
NULL_RTX, NULL_RTX);
}
}
@ -19544,12 +19573,12 @@ rs6000_emit_prologue (void)
for (i = 0; i < 64 - info->first_fp_reg_save; i++)
if (df_regs_ever_live_p (info->first_fp_reg_save + i)
&& ! call_used_regs[info->first_fp_reg_save + i])
emit_frame_save (frame_reg_rtx, frame_ptr_rtx,
emit_frame_save (frame_reg_rtx,
(TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT
? DFmode : SFmode),
info->first_fp_reg_save + i,
info->fp_save_offset + frame_off + 8 * i,
info->total_size);
sp_off - frame_off);
}
else if (!WORLD_SAVE_P (info) && info->first_fp_reg_save != 64)
{
@ -19560,7 +19589,7 @@ rs6000_emit_prologue (void)
/*lr=*/((strategy
& SAVE_NOINLINE_FPRS_SAVES_LR)
!= 0));
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
rs6000_frame_related (insn, frame_reg_rtx, sp_off - frame_off,
NULL_RTX, NULL_RTX);
}
@ -19588,7 +19617,7 @@ rs6000_emit_prologue (void)
if (spe_regs_addressable)
{
spe_save_area_ptr = frame_reg_rtx;
save_ptr_to_sp = info->total_size - frame_off;
save_ptr_to_sp = sp_off - frame_off;
spe_offset = info->spe_gp_save_offset + frame_off;
}
else
@ -19603,7 +19632,7 @@ rs6000_emit_prologue (void)
- (FIRST_SAVRES_REGISTER + 1));
offset = info->spe_gp_save_offset + frame_off - ool_adjust;
spe_save_area_ptr = gen_rtx_REG (Pmode, 11);
save_ptr_to_sp = info->total_size - frame_off + offset;
save_ptr_to_sp = sp_off - frame_off + offset;
spe_offset = 0;
if (using_static_chain_p)
@ -19696,7 +19725,7 @@ rs6000_emit_prologue (void)
/*lr=*/((strategy
& SAVE_NOINLINE_GPRS_SAVES_LR)
!= 0));
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
rs6000_frame_related (insn, frame_reg_rtx, sp_off - frame_off,
NULL_RTX, NULL_RTX);
}
else if (!WORLD_SAVE_P (info) && using_store_multiple)
@ -19717,7 +19746,7 @@ rs6000_emit_prologue (void)
RTVEC_ELT (p, i) = gen_rtx_SET (VOIDmode, mem, reg);
}
insn = emit_insn (gen_rtx_PARALLEL (VOIDmode, p));
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
rs6000_frame_related (insn, frame_reg_rtx, sp_off - frame_off,
NULL_RTX, NULL_RTX);
}
else if (!WORLD_SAVE_P (info))
@ -19736,7 +19765,7 @@ rs6000_emit_prologue (void)
mem = gen_frame_mem (reg_mode, addr);
insn = emit_move_insn (mem, reg);
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
rs6000_frame_related (insn, frame_reg_rtx, sp_off - frame_off,
NULL_RTX, NULL_RTX);
}
}
@ -19753,9 +19782,9 @@ rs6000_emit_prologue (void)
if (regno == INVALID_REGNUM)
break;
emit_frame_save (frame_reg_rtx, frame_ptr_rtx, reg_mode, regno,
emit_frame_save (frame_reg_rtx, reg_mode, regno,
info->ehrd_offset + frame_off + reg_size * (int) i,
info->total_size);
sp_off - frame_off);
}
}
@ -19798,9 +19827,9 @@ rs6000_emit_prologue (void)
JUMP_LABEL (jump) = toc_save_done;
LABEL_NUSES (toc_save_done) += 1;
save_insn = emit_frame_save (frame_reg_rtx, frame_ptr_rtx, reg_mode,
save_insn = emit_frame_save (frame_reg_rtx, reg_mode,
TOC_REGNUM, frame_off + 5 * reg_size,
info->total_size);
sp_off - frame_off);
emit_label (toc_save_done);
@ -19813,8 +19842,11 @@ rs6000_emit_prologue (void)
code that minimizes the number of DW_CFA_advance opcodes better
freedom in placing the annotations. */
note = find_reg_note (save_insn, REG_FRAME_RELATED_EXPR, NULL);
gcc_assert (note);
remove_note (save_insn, note);
if (note)
remove_note (save_insn, note);
else
note = alloc_reg_note (REG_FRAME_RELATED_EXPR,
copy_rtx (PATTERN (save_insn)), NULL_RTX);
RTX_FRAME_RELATED_P (save_insn) = 0;
join_insn = emit_insn (gen_blockage ());
@ -19848,7 +19880,7 @@ rs6000_emit_prologue (void)
}
insn = emit_move_insn (mem, cr_save_rtx);
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
rs6000_frame_related (insn, frame_reg_rtx, sp_off - frame_off,
NULL_RTX, NULL_RTX);
}
@ -19870,6 +19902,7 @@ rs6000_emit_prologue (void)
else
frame_off = info->total_size;
rs6000_emit_allocate_stack (info->total_size, copy_reg);
sp_off = info->total_size;
if (frame_reg_rtx != sp_reg_rtx)
rs6000_emit_stack_tie (frame_reg_rtx, false);
}
@ -19910,7 +19943,7 @@ rs6000_emit_prologue (void)
insn = emit_move_insn (mem, savereg);
rs6000_frame_related (insn, frame_ptr_rtx, info->total_size,
rs6000_frame_related (insn, frame_reg_rtx, sp_off - frame_off,
areg, GEN_INT (offset));
}
}