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rs6000.c (save_reg_p): New function. 

* config/rs6000/rs6000.c (save_reg_p): New function.
	(first_reg_to_save, first_fp_reg_to_save): Use it here.
	(first_altivec_reg_to_save, restore_saved_cr): Likewise.
	(emit_frame_save): Use gen_frame_store.
	(gen_frame_mem_offset): Correct SPE condition requiring reg+reg.
	(rs6000_emit_prologue): Use save_reg_p.  Use gen_frame_store for
	vrsave and toc.
	(rs6000_emit_epilogue): Use save_reg_p.  Use gen_frame_load for
	vrsave, toc, gp and fp restores.

From-SVN: r187749
This commit is contained in:
Alan Modra 2012-05-22 08:21:38 +09:30 committed by Alan Modra
parent e1968bbaad
commit bbd72c2fe7
2 changed files with 61 additions and 67 deletions
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12
gcc/ChangeLog
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@ -1,3 +1,15 @@
2012-05-22 Alan Modra <amodra@gmail.com>
* config/rs6000/rs6000.c (save_reg_p): New function.
(first_reg_to_save, first_fp_reg_to_save): Use it here.
(first_altivec_reg_to_save, restore_saved_cr): Likewise.
(emit_frame_save): Use gen_frame_store.
(gen_frame_mem_offset): Correct SPE condition requiring reg+reg.
(rs6000_emit_prologue): Use save_reg_p. Use gen_frame_store for
vrsave and toc.
(rs6000_emit_epilogue): Use save_reg_p. Use gen_frame_load for
vrsave, toc, gp and fp restores.
2012-05-22 Alan Modra <amodra@gmail.com>
* config/rs6000/rs6000.c: Delete unnecessary forward declarations.

116
gcc/config/rs6000/rs6000.c
View File

@ -17022,6 +17022,12 @@ rs6000_split_multireg_move (rtx dst, rtx src)
/* This page contains routines that are used to determine what the
function prologue and epilogue code will do and write them out. */
static inline bool
save_reg_p (int r)
{
return !call_used_regs[r] && df_regs_ever_live_p (r);
}
/* Return the first fixed-point register that is required to be
saved. 32 if none. */
@ -17032,14 +17038,16 @@ first_reg_to_save (void)
/* Find lowest numbered live register. */
for (first_reg = 13; first_reg <= 31; first_reg++)
if (df_regs_ever_live_p (first_reg)
&& (! call_used_regs[first_reg]
|| (first_reg == RS6000_PIC_OFFSET_TABLE_REGNUM
&& ((DEFAULT_ABI == ABI_V4 && flag_pic != 0)
|| (DEFAULT_ABI == ABI_DARWIN && flag_pic)
|| (TARGET_TOC && TARGET_MINIMAL_TOC)))))
if (save_reg_p (first_reg))
break;
if (first_reg > RS6000_PIC_OFFSET_TABLE_REGNUM
&& ((DEFAULT_ABI == ABI_V4 && flag_pic != 0)
|| (DEFAULT_ABI == ABI_DARWIN && flag_pic)
|| (TARGET_TOC && TARGET_MINIMAL_TOC))
&& df_regs_ever_live_p (RS6000_PIC_OFFSET_TABLE_REGNUM))
first_reg = RS6000_PIC_OFFSET_TABLE_REGNUM;
#if TARGET_MACHO
if (flag_pic
&& crtl->uses_pic_offset_table
@ -17059,7 +17067,7 @@ first_fp_reg_to_save (void)
/* Find lowest numbered live register. */
for (first_reg = 14 + 32; first_reg <= 63; first_reg++)
if (df_regs_ever_live_p (first_reg))
if (save_reg_p (first_reg))
break;
return first_reg;
@ -17085,7 +17093,7 @@ first_altivec_reg_to_save (void)
/* Find lowest numbered live register. */
for (i = FIRST_ALTIVEC_REGNO + 20; i <= LAST_ALTIVEC_REGNO; ++i)
if (df_regs_ever_live_p (i))
if (save_reg_p (i))
break;
return i;
@ -18781,7 +18789,7 @@ static rtx
emit_frame_save (rtx frame_reg, enum machine_mode mode,
unsigned int regno, int offset, HOST_WIDE_INT frame_reg_to_sp)
{
rtx reg, insn, mem, addr;
rtx reg, insn;
/* Some cases that need register indexed addressing. */
gcc_checking_assert (!((TARGET_ALTIVEC_ABI && ALTIVEC_VECTOR_MODE (mode))
@ -18792,9 +18800,7 @@ emit_frame_save (rtx frame_reg, enum machine_mode mode,
&& !SPE_CONST_OFFSET_OK (offset))));
reg = gen_rtx_REG (mode, regno);
addr = gen_rtx_PLUS (Pmode, frame_reg, GEN_INT (offset));
mem = gen_frame_mem (mode, addr);
insn = emit_move_insn (mem, reg);
insn = emit_insn (gen_frame_store (reg, frame_reg, offset));
return rs6000_frame_related (insn, frame_reg, frame_reg_to_sp,
NULL_RTX, NULL_RTX);
}
@ -18809,7 +18815,7 @@ gen_frame_mem_offset (enum machine_mode mode, rtx reg, int offset)
int_rtx = GEN_INT (offset);
if ((TARGET_SPE_ABI && SPE_VECTOR_MODE (mode))
if ((TARGET_SPE_ABI && SPE_VECTOR_MODE (mode) && !SPE_CONST_OFFSET_OK (offset))
|| (TARGET_E500_DOUBLE && mode == DFmode))
{
offset_rtx = gen_rtx_REG (Pmode, FIXED_SCRATCH);
@ -19438,8 +19444,7 @@ rs6000_emit_prologue (void)
{
int i;
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])
if (save_reg_p (info->first_fp_reg_save + i))
emit_frame_save (frame_reg_rtx,
(TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT
? DFmode : SFmode),
@ -19889,7 +19894,7 @@ rs6000_emit_prologue (void)
&& TARGET_ALTIVEC_VRSAVE
&& info->vrsave_mask != 0)
{
rtx reg, mem, vrsave;
rtx reg, vrsave;
int offset;
int save_regno;
@ -19916,10 +19921,7 @@ rs6000_emit_prologue (void)
/* Save VRSAVE. */
offset = info->vrsave_save_offset + frame_off;
mem = gen_frame_mem (SImode,
gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (offset)));
insn = emit_move_insn (mem, reg);
insn = emit_insn (gen_frame_store (reg, frame_reg_rtx, offset));
/* Include the registers in the mask. */
emit_insn (gen_iorsi3 (reg, reg, GEN_INT ((int) info->vrsave_mask)));
@ -20000,9 +20002,8 @@ rs6000_emit_prologue (void)
linux-unwind.h frob_update_context. */
if (rs6000_save_toc_in_prologue_p ())
{
rtx addr = gen_rtx_PLUS (Pmode, sp_reg_rtx, GEN_INT (5 * reg_size));
rtx mem = gen_frame_mem (reg_mode, addr);
emit_move_insn (mem, gen_rtx_REG (reg_mode, TOC_REGNUM));
rtx reg = gen_rtx_REG (reg_mode, TOC_REGNUM);
emit_insn (gen_frame_store (reg, sp_reg_rtx, 5 * reg_size));
}
}
@ -20100,7 +20101,7 @@ restore_saved_cr (rtx reg, int using_mfcr_multiple, bool exit_func)
if (using_mfcr_multiple)
{
for (i = 0; i < 8; i++)
if (df_regs_ever_live_p (CR0_REGNO+i) && ! call_used_regs[CR0_REGNO+i])
if (save_reg_p (CR0_REGNO + i))
count++;
gcc_assert (count);
}
@ -20114,13 +20115,13 @@ restore_saved_cr (rtx reg, int using_mfcr_multiple, bool exit_func)
ndx = 0;
for (i = 0; i < 8; i++)
if (df_regs_ever_live_p (CR0_REGNO+i) && ! call_used_regs[CR0_REGNO+i])
if (save_reg_p (CR0_REGNO + i))
{
rtvec r = rtvec_alloc (2);
RTVEC_ELT (r, 0) = reg;
RTVEC_ELT (r, 1) = GEN_INT (1 << (7-i));
RTVEC_ELT (p, ndx) =
gen_rtx_SET (VOIDmode, gen_rtx_REG (CCmode, CR0_REGNO+i),
gen_rtx_SET (VOIDmode, gen_rtx_REG (CCmode, CR0_REGNO + i),
gen_rtx_UNSPEC (CCmode, r, UNSPEC_MOVESI_TO_CR));
ndx++;
}
@ -20129,8 +20130,8 @@ restore_saved_cr (rtx reg, int using_mfcr_multiple, bool exit_func)
}
else
for (i = 0; i < 8; i++)
if (df_regs_ever_live_p (CR0_REGNO+i) && ! call_used_regs[CR0_REGNO+i])
emit_insn (gen_movsi_to_cr_one (gen_rtx_REG (CCmode, CR0_REGNO+i),
if (save_reg_p (CR0_REGNO + i))
emit_insn (gen_movsi_to_cr_one (gen_rtx_REG (CCmode, CR0_REGNO + i),
reg));
if (!exit_func && (DEFAULT_ABI == ABI_V4 || flag_shrink_wrap))
@ -20463,7 +20464,7 @@ rs6000_emit_epilogue (int sibcall)
|| (DEFAULT_ABI != ABI_V4
&& offset_below_red_zone_p (info->vrsave_save_offset))))
{
rtx addr, mem, reg;
rtx reg;
if (frame_reg_rtx == sp_reg_rtx)
{
@ -20478,11 +20479,9 @@ rs6000_emit_epilogue (int sibcall)
frame_reg_rtx = hard_frame_pointer_rtx;
}
addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->vrsave_save_offset + frame_off));
mem = gen_frame_mem (SImode, addr);
reg = gen_rtx_REG (SImode, 12);
emit_move_insn (reg, mem);
emit_insn (gen_frame_load (reg, frame_reg_rtx,
info->vrsave_save_offset + frame_off));
emit_insn (generate_set_vrsave (reg, info, 1));
}
@ -20660,13 +20659,11 @@ rs6000_emit_epilogue (int sibcall)
&& (DEFAULT_ABI == ABI_V4
|| !offset_below_red_zone_p (info->vrsave_save_offset)))
{
rtx addr, mem, reg;
rtx reg;
addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->vrsave_save_offset + frame_off));
mem = gen_frame_mem (SImode, addr);
reg = gen_rtx_REG (SImode, 12);
emit_move_insn (reg, mem);
emit_insn (gen_frame_load (reg, frame_reg_rtx,
info->vrsave_save_offset + frame_off));
emit_insn (generate_set_vrsave (reg, info, 1));
}
@ -20720,11 +20717,9 @@ rs6000_emit_epilogue (int sibcall)
if (TARGET_AIX)
{
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (frame_off + 5 * reg_size));
rtx mem = gen_frame_mem (reg_mode, addr);
emit_move_insn (gen_rtx_REG (reg_mode, 2), mem);
rtx reg = gen_rtx_REG (reg_mode, 2);
emit_insn (gen_frame_load (reg, frame_reg_rtx,
frame_off + 5 * reg_size));
}
for (i = 0; ; ++i)
@ -20735,6 +20730,7 @@ rs6000_emit_epilogue (int sibcall)
if (regno == INVALID_REGNUM)
break;
/* Note: possible use of r0 here to address SPE regs. */
mem = gen_frame_mem_offset (reg_mode, frame_reg_rtx,
info->ehrd_offset + frame_off
+ reg_size * (int) i);
@ -20853,16 +20849,10 @@ rs6000_emit_epilogue (int sibcall)
{
for (i = 0; i < 32 - info->first_gp_reg_save; i++)
if (rs6000_reg_live_or_pic_offset_p (info->first_gp_reg_save + i))
{
rtx addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->gp_save_offset
+ frame_off
+ reg_size * i));
rtx mem = gen_frame_mem (reg_mode, addr);
rtx reg = gen_rtx_REG (reg_mode, info->first_gp_reg_save + i);
emit_move_insn (reg, mem);
}
emit_insn (gen_frame_load
(gen_rtx_REG (reg_mode, info->first_gp_reg_save + i),
frame_reg_rtx,
info->gp_save_offset + frame_off + reg_size * i));
}
if (DEFAULT_ABI == ABI_V4 || flag_shrink_wrap)
@ -20925,21 +20915,13 @@ rs6000_emit_epilogue (int sibcall)
/* Restore fpr's if we need to do it without calling a function. */
if (restoring_FPRs_inline)
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]))
if (save_reg_p (info->first_fp_reg_save + i))
{
rtx addr, mem, reg;
addr = gen_rtx_PLUS (Pmode, frame_reg_rtx,
GEN_INT (info->fp_save_offset
+ frame_off
+ 8 * i));
mem = gen_frame_mem ((TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT
? DFmode : SFmode), addr);
reg = gen_rtx_REG ((TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT
? DFmode : SFmode),
info->first_fp_reg_save + i);
emit_move_insn (reg, mem);
rtx reg = gen_rtx_REG ((TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT
? DFmode : SFmode),
info->first_fp_reg_save + i);
emit_insn (gen_frame_load (reg, frame_reg_rtx,
info->fp_save_offset + frame_off + 8 * i));
if (DEFAULT_ABI == ABI_V4 || flag_shrink_wrap)
cfa_restores = alloc_reg_note (REG_CFA_RESTORE, reg, cfa_restores);
}