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Improve FOR loop const specialization and integerness checks.

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This commit is contained in:
Mike Pall
2010-02-15 01:07:30 +01:00
parent 2a2f8ed6a1
commit b6e4fde0dc
2 changed files with 67 additions and 33 deletions
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12
src/lj_asm.c
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@@ -1893,9 +1893,8 @@ static void asm_sload(ASMState *as, IRIns *ir)
IRType1 t = ir->t;
Reg base;
lua_assert(!(ir->op2 & IRSLOAD_PARENT)); /* Handled by asm_head_side(). */
lua_assert(!irt_isguard(ir->t) ==
!((ir->op2 & IRSLOAD_TYPECHECK) || irt_isint(t)));
if (irt_isint(t)) {
lua_assert(irt_isguard(ir->t) || !(ir->op2 & IRSLOAD_TYPECHECK));
if (irt_isint(t) && irt_isguard(t)) {
Reg left = ra_scratch(as, RSET_FPR);
asm_tointg(as, ir, left); /* Frees dest reg. Do this before base alloc. */
base = ra_alloc1(as, REF_BASE, RSET_GPR);
@@ -1904,9 +1903,12 @@ static void asm_sload(ASMState *as, IRIns *ir)
} else if (ra_used(ir)) {
RegSet allow = irt_isnum(ir->t) ? RSET_FPR : RSET_GPR;
Reg dest = ra_dest(as, ir, allow);
lua_assert(irt_isnum(ir->t) || irt_isaddr(ir->t));
base = ra_alloc1(as, REF_BASE, RSET_GPR);
emit_movrmro(as, dest, base, ofs);
lua_assert(irt_isnum(t) || irt_isint(t) || irt_isaddr(t));
if (irt_isint(t))
emit_rmro(as, XO_CVTSD2SI, dest, base, ofs);
else
emit_movrmro(as, dest, base, ofs);
} else {
if (!(ir->op2 & IRSLOAD_TYPECHECK))
return; /* No type check: avoid base alloc. */