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authorRichard Henderson <richard.henderson@linaro.org>2018-11-27 07:44:51 -0800
committerRichard Henderson <richard.henderson@linaro.org>2018-12-26 06:57:37 +1100
commit69e3706d2b473815e382552e729d12590339e0ac (patch)
tree9c1dc684b6b9086073ddee4f5583b675c1757177
parentba87719cd267e6f07b17f6cda08246bf483146d4 (diff)
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tcg: Add output_pref to TCGOp
Allocate storage for, but do not yet fill in, per-opcode preferences for the output operands. Pass it in to the register allocation routines for output operands. Reviewed-by: Emilio G. Cota <cota@braap.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
-rw-r--r--tcg/tcg.c18
-rw-r--r--tcg/tcg.h3
2 files changed, 14 insertions, 7 deletions
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 7844158..32c66da 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -2591,6 +2591,8 @@ static void liveness_pass_1(TCGContext *s)
break;
}
op->life = arg_life;
+ op->output_pref[0] = 0;
+ op->output_pref[1] = 0;
}
}
@@ -3105,17 +3107,18 @@ static void tcg_reg_alloc_movi(TCGContext *s, const TCGOp *op)
TCGTemp *ots = arg_temp(op->args[0]);
tcg_target_ulong val = op->args[1];
- tcg_reg_alloc_do_movi(s, ots, val, op->life, 0);
+ tcg_reg_alloc_do_movi(s, ots, val, op->life, op->output_pref[0]);
}
static void tcg_reg_alloc_mov(TCGContext *s, const TCGOp *op)
{
const TCGLifeData arg_life = op->life;
- TCGRegSet allocated_regs;
+ TCGRegSet allocated_regs, preferred_regs;
TCGTemp *ts, *ots;
TCGType otype, itype;
allocated_regs = s->reserved_regs;
+ preferred_regs = op->output_pref[0];
ots = arg_temp(op->args[0]);
ts = arg_temp(op->args[1]);
@@ -3129,7 +3132,7 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOp *op)
if (IS_DEAD_ARG(1)) {
temp_dead(s, ts);
}
- tcg_reg_alloc_do_movi(s, ots, val, arg_life, 0);
+ tcg_reg_alloc_do_movi(s, ots, val, arg_life, preferred_regs);
return;
}
@@ -3138,7 +3141,8 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOp *op)
the SOURCE value into its own register first, that way we
don't have to reload SOURCE the next time it is used. */
if (ts->val_type == TEMP_VAL_MEM) {
- temp_load(s, ts, tcg_target_available_regs[itype], allocated_regs, 0);
+ temp_load(s, ts, tcg_target_available_regs[itype],
+ allocated_regs, preferred_regs);
}
tcg_debug_assert(ts->val_type == TEMP_VAL_REG);
@@ -3168,7 +3172,7 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOp *op)
input one. */
tcg_regset_set_reg(allocated_regs, ts->reg);
ots->reg = tcg_reg_alloc(s, tcg_target_available_regs[otype],
- allocated_regs, 0,
+ allocated_regs, preferred_regs,
ots->indirect_base);
}
tcg_out_mov(s, otype, ots->reg, ts->reg);
@@ -3302,7 +3306,7 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op)
} else if (arg_ct->ct & TCG_CT_NEWREG) {
reg = tcg_reg_alloc(s, arg_ct->u.regs,
i_allocated_regs | o_allocated_regs,
- 0, ts->indirect_base);
+ op->output_pref[k], ts->indirect_base);
} else {
/* if fixed register, we try to use it */
reg = ts->reg;
@@ -3311,7 +3315,7 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op)
goto oarg_end;
}
reg = tcg_reg_alloc(s, arg_ct->u.regs, o_allocated_regs,
- 0, ts->indirect_base);
+ op->output_pref[k], ts->indirect_base);
}
tcg_regset_set_reg(o_allocated_regs, reg);
/* if a fixed register is used, then a move will be done afterwards */
diff --git a/tcg/tcg.h b/tcg/tcg.h
index db2d918..c6721cc 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -619,6 +619,9 @@ typedef struct TCGOp {
/* Arguments for the opcode. */
TCGArg args[MAX_OPC_PARAM];
+
+ /* Register preferences for the output(s). */
+ TCGRegSet output_pref[2];
} TCGOp;
#define TCGOP_CALLI(X) (X)->param1