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Optimize table length computation with hinting.

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10x faster on loop with t[#t+1] = x idiom. Also used by table.insert.
This commit is contained in:
Mike Pall
2020-05-27 19:20:44 +02:00
parent b2307c8ad8
commit 1a4ff13117
12 changed files with 135 additions and 82 deletions
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7
src/lj_asm.c
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@@ -1634,6 +1634,12 @@ static void asm_fuseequal(ASMState *as, IRIns *ir)
}
}
static void asm_alen(ASMState *as, IRIns *ir)
{
asm_callid(as, ir, ir->op2 == REF_NIL ? IRCALL_lj_tab_len :
IRCALL_lj_tab_len_hint);
}
/* -- Instruction dispatch ------------------------------------------------ */
/* Assemble a single instruction. */
@@ -1716,6 +1722,7 @@ static void asm_ir(ASMState *as, IRIns *ir)
case IR_FLOAD: asm_fload(as, ir); break;
case IR_XLOAD: asm_xload(as, ir); break;
case IR_SLOAD: asm_sload(as, ir); break;
case IR_ALEN: asm_alen(as, ir); break;
case IR_ASTORE: case IR_HSTORE: case IR_USTORE: asm_ahustore(as, ir); break;
case IR_FSTORE: asm_fstore(as, ir); break;