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LRA: identify biggest access mode for hard_regs and use it in split_reg

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PR target/70083
	* lra-lives.c (process_bb_lives): Also update biggest mode for hard
	regs.
	(lra_create_live_ranges_1): initialize hard register biggest_mode to
	VOIDmode.
	* lra-constraints.c (split_reg): For hard regs, try to find the
	biggest single-register mode used in the function.

testsuite/
	PR target/70083
	* gcc.dg/torture/pr70083.c: New test.
	* gcc.target/i386/pr70083.c: New test.

From-SVN: r234184
This commit is contained in:
Bernd Schmidt 2016-03-14 15:08:54 +00:00 committed by Bernd Schmidt
parent a9fee7cdc3
commit 3cbf012a40
6 changed files with 79 additions and 15 deletions
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10
gcc/ChangeLog
View File

@ -1,3 +1,13 @@
2016-03-14 Bernd Schmidt <bschmidt@redhat.com>
PR target/70083
* lra-lives.c (process_bb_lives): Also update biggest mode for hard
regs.
(lra_create_live_ranges_1): initialize hard register biggest_mode to
VOIDmode.
* lra-constraints.c (split_reg): For hard regs, try to find the
biggest single-register mode used in the function.
2016-03-14 Richard Biener <rguenther@suse.de>
PR tree-optimization/56365

23
gcc/lra-constraints.c
View File

@ -4972,6 +4972,7 @@ split_reg (bool before_p, int original_regno, rtx_insn *insn,
rtx_insn *restore, *save;
bool after_p;
bool call_save_p;
machine_mode mode;
if (original_regno < FIRST_PSEUDO_REGISTER)
{
@ -4979,24 +4980,32 @@ split_reg (bool before_p, int original_regno, rtx_insn *insn,
hard_regno = original_regno;
call_save_p = false;
nregs = 1;
mode = lra_reg_info[hard_regno].biggest_mode;
machine_mode reg_rtx_mode = GET_MODE (regno_reg_rtx[hard_regno]);
if (GET_MODE_SIZE (mode) > GET_MODE_SIZE (reg_rtx_mode))
{
original_reg = regno_reg_rtx[hard_regno];
mode = reg_rtx_mode;
}
else
original_reg = gen_rtx_REG (mode, hard_regno);
}
else
{
mode = PSEUDO_REGNO_MODE (original_regno);
hard_regno = reg_renumber[original_regno];
nregs = hard_regno_nregs[hard_regno][PSEUDO_REGNO_MODE (original_regno)];
nregs = hard_regno_nregs[hard_regno][mode];
rclass = lra_get_allocno_class (original_regno);
original_reg = regno_reg_rtx[original_regno];
call_save_p = need_for_call_save_p (original_regno);
}
original_reg = regno_reg_rtx[original_regno];
lra_assert (hard_regno >= 0);
if (lra_dump_file != NULL)
fprintf (lra_dump_file,
" ((((((((((((((((((((((((((((((((((((((((((((((((\n");
if (call_save_p)
{
machine_mode mode = GET_MODE (original_reg);
mode = HARD_REGNO_CALLER_SAVE_MODE (hard_regno,
hard_regno_nregs[hard_regno][mode],
mode);
@ -5004,8 +5013,7 @@ split_reg (bool before_p, int original_regno, rtx_insn *insn,
}
else
{
rclass = choose_split_class (rclass, hard_regno,
GET_MODE (original_reg));
rclass = choose_split_class (rclass, hard_regno, mode);
if (rclass == NO_REGS)
{
if (lra_dump_file != NULL)
@ -5023,8 +5031,7 @@ split_reg (bool before_p, int original_regno, rtx_insn *insn,
}
return false;
}
new_reg = lra_create_new_reg (GET_MODE (original_reg), original_reg,
rclass, "split");
new_reg = lra_create_new_reg (mode, original_reg, rclass, "split");
reg_renumber[REGNO (new_reg)] = hard_regno;
}
save = emit_spill_move (true, new_reg, original_reg);

15
gcc/lra-lives.c
View File

@ -700,12 +700,13 @@ process_bb_lives (basic_block bb, int &curr_point, bool dead_insn_p)
/* Update max ref width and hard reg usage. */
for (reg = curr_id->regs; reg != NULL; reg = reg->next)
if (reg->regno >= FIRST_PSEUDO_REGISTER
&& (GET_MODE_SIZE (reg->biggest_mode)
> GET_MODE_SIZE (lra_reg_info[reg->regno].biggest_mode)))
lra_reg_info[reg->regno].biggest_mode = reg->biggest_mode;
else if (reg->regno < FIRST_PSEUDO_REGISTER)
lra_hard_reg_usage[reg->regno] += freq;
{
if (GET_MODE_SIZE (reg->biggest_mode)
> GET_MODE_SIZE (lra_reg_info[reg->regno].biggest_mode))
lra_reg_info[reg->regno].biggest_mode = reg->biggest_mode;
if (reg->regno < FIRST_PSEUDO_REGISTER)
lra_hard_reg_usage[reg->regno] += freq;
}
call_p = CALL_P (curr_insn);
src_regno = (set != NULL_RTX && REG_P (SET_SRC (set))
@ -1208,7 +1209,7 @@ lra_create_live_ranges_1 (bool all_p, bool dead_insn_p)
conservative because of recent transformation. Here in this
file we recalculate it again as it costs practically
nothing. */
if (regno_reg_rtx[i] != NULL_RTX)
if (i >= FIRST_PSEUDO_REGISTER && regno_reg_rtx[i] != NULL_RTX)
lra_reg_info[i].biggest_mode = GET_MODE (regno_reg_rtx[i]);
else
lra_reg_info[i].biggest_mode = VOIDmode;

6
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,9 @@
2016-03-14 Bernd Schmidt <bschmidt@redhat.com>
PR target/70083
* gcc.dg/torture/pr70083.c: New test.
* gcc.target/i386/pr70083.c: New test.
2016-03-14 Richard Biener <rguenther@suse.de>
PR tree-optimization/56365

20
gcc/testsuite/gcc.dg/torture/pr70083.c Normal file
View File

@ -0,0 +1,20 @@
/* { dg-do compile } */
/* { dg-options "-Wno-psabi" } */
typedef short v16hi __attribute__ ((vector_size (32)));
typedef int v8si __attribute__ ((vector_size (32)));
typedef long long v4di __attribute__ ((vector_size (32)));
int
foo(int u32_0, int u64_0, int u64_1, v16hi v32u16_0, v8si v32u32_0, v4di v32u64_0, v16hi v32u16_1, v8si v32u32_1, v4di v32u64_1)
{
v32u32_1 %= (v8si) v32u16_1 | 1;
v32u64_1[1] |= ((1));
v32u16_0 /= (v16hi){~u64_1, 1, 0xb56c, 0xd279, 0x26b6, 0x74d9, 0xf764, 0, 0, -v32u16_1[6]} | 1;
v32u16_1 ^= (v16hi){0xc98d, 1, 0x8c71, u32_0, 0x5366, 0, ~v32u64_1[1]} & 31;
v32u32_0 -= (v8si)~v32u64_1;
v32u32_1[2] |= 0x1f;
v32u16_0 %= (v16hi){2, 0xffff, u32_0, 1, v32u64_0[1], u32_0 };
v32u32_1 /= (v8si){0x1e7390, v32u16_0[12], ~v32u16_1[2], -u64_0};
return v32u16_0[4] + v32u16_0[5] + v32u32_0[5] + v32u32_1[6] + v32u64_1[3];
}

20
gcc/testsuite/gcc.target/i386/pr70083.c Normal file
View File

@ -0,0 +1,20 @@
/* { dg-do compile } */
/* { dg-options "-Wno-psabi -O2 -fno-dce -fschedule-insns -fno-sched-critical-path-heuristic -mavx512dq --param=max-cse-insns=1" } */
typedef short v16hi __attribute__ ((vector_size (32)));
typedef int v8si __attribute__ ((vector_size (32)));
typedef long long v4di __attribute__ ((vector_size (32)));
int
foo(int u32_0, int u64_0, int u64_1, v16hi v32u16_0, v8si v32u32_0, v4di v32u64_0, v16hi v32u16_1, v8si v32u32_1, v4di v32u64_1)
{
v32u32_1 %= (v8si) v32u16_1 | 1;
v32u64_1[1] |= ((1));
v32u16_0 /= (v16hi){~u64_1, 1, 0xb56c, 0xd279, 0x26b6, 0x74d9, 0xf764, 0, 0, -v32u16_1[6]} | 1;
v32u16_1 ^= (v16hi){0xc98d, 1, 0x8c71, u32_0, 0x5366, 0, ~v32u64_1[1]} & 31;
v32u32_0 -= (v8si)~v32u64_1;
v32u32_1[2] |= 0x1f;
v32u16_0 %= (v16hi){2, 0xffff, u32_0, 1, v32u64_0[1], u32_0 };
v32u32_1 /= (v8si){0x1e7390, v32u16_0[12], ~v32u16_1[2], -u64_0};
return v32u16_0[4] + v32u16_0[5] + v32u32_0[5] + v32u32_1[6] + v32u64_1[3];
}