diff options
| -rw-r--r-- | erts/emulator/beam/beam_load.c | 94 | ||||
| -rwxr-xr-x | erts/emulator/utils/beam_makeops | 65 |
2 files changed, 49 insertions, 110 deletions
diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c index 2f2b433999..c6c35e74c9 100644 --- a/erts/emulator/beam/beam_load.c +++ b/erts/emulator/beam/beam_load.c @@ -4813,31 +4813,25 @@ transform_engine(LoaderState* st) Uint op; int ap; /* Current argument. */ Uint* restart; /* Where to restart if current match fails. */ - GenOpArg def_vars[TE_MAX_VARS]; /* Default buffer for variables. */ - GenOpArg* var = def_vars; - int num_vars = 0; + GenOpArg var[TE_MAX_VARS]; /* Buffer for variables. */ + GenOpArg* rest_args = NULL; + int num_rest_args = 0; int i; /* General index. */ Uint mask; GenOp* instr; + GenOp* first = st->genop; + GenOp* keep = NULL; Uint* pc; - int rval; static Uint restart_fail[1] = {TOP_fail}; - ASSERT(gen_opc[st->genop->op].transform != -1); - pc = op_transform + gen_opc[st->genop->op].transform; - restart = pc; + ASSERT(gen_opc[first->op].transform != -1); + restart = op_transform + gen_opc[first->op].transform; restart: - if (var != def_vars) { - erts_free(ERTS_ALC_T_LOADER_TMP, (void *) var); - var = def_vars; - } ASSERT(restart != NULL); pc = restart; ASSERT(*pc < NUM_TOPS); /* Valid instruction? */ - instr = st->genop; - -#define RETURN(r) rval = (r); goto do_return; + instr = first; #ifdef DEBUG restart = NULL; @@ -4855,7 +4849,7 @@ transform_engine(LoaderState* st) * We'll need at least one more instruction to decide whether * this combination matches or not. */ - RETURN(TE_SHORT_WINDOW); + return TE_SHORT_WINDOW; } if (*pc++ != instr->op) goto restart; @@ -5017,19 +5011,9 @@ transform_engine(LoaderState* st) #if defined(TOP_rest_args) case TOP_rest_args: { - int n = *pc++; int formal_arity = gen_opc[instr->op].arity; - int j = formal_arity; - - num_vars = n + (instr->arity - formal_arity); - var = erts_alloc(ERTS_ALC_T_LOADER_TMP, - num_vars * sizeof(GenOpArg)); - for (i = 0; i < n; i++) { - var[i] = def_vars[i]; - } - while (i < num_vars) { - var[i++] = instr->a[j++]; - } + num_rest_args = instr->arity - formal_arity; + rest_args = instr->a + formal_arity; } break; #endif @@ -5038,16 +5022,8 @@ transform_engine(LoaderState* st) break; case TOP_commit: instr = instr->next; /* The next_instr was optimized away. */ - - /* - * The left-hand side of this transformation matched. - * Delete all matched instructions. - */ - while (st->genop != instr) { - GenOp* next = st->genop->next; - FREE_GENOP(st, st->genop); - st->genop = next; - } + keep = instr; + st->genop = instr; #ifdef DEBUG instr = 0; #endif @@ -5077,22 +5053,19 @@ transform_engine(LoaderState* st) lastp = &((*lastp)->next); } - instr = instr->next; /* The next_instr was optimized away. */ - - /* - * The left-hand side of this transformation matched. - * Delete all matched instructions. - */ - while (st->genop != instr) { - GenOp* next = st->genop->next; - FREE_GENOP(st, st->genop); - st->genop = next; - } - *lastp = st->genop; + keep = instr->next; /* The next_instr was optimized away. */ + *lastp = keep; st->genop = new_instr; } - RETURN(TE_OK); + /* FALLTHROUGH */ #endif + case TOP_end: + while (first != keep) { + GenOp* next = first->next; + FREE_GENOP(st, first); + first = next; + } + return TE_OK; case TOP_new_instr: /* * Note that the instructions are generated in reverse order. @@ -5123,14 +5096,10 @@ transform_engine(LoaderState* st) #if defined(TOP_store_rest_args) case TOP_store_rest_args: { - int n = *pc++; - int num_extra = num_vars - n; - - ASSERT(n <= num_vars); - GENOP_ARITY(instr, instr->arity+num_extra); + GENOP_ARITY(instr, instr->arity+num_rest_args); memcpy(instr->a, instr->def_args, ap*sizeof(GenOpArg)); - memcpy(instr->a+ap, var+n, num_extra*sizeof(GenOpArg)); - ap += num_extra; + memcpy(instr->a+ap, rest_args, num_rest_args*sizeof(GenOpArg)); + ap += num_rest_args; } break; #endif @@ -5142,21 +5111,12 @@ transform_engine(LoaderState* st) case TOP_try_me_else_fail: restart = restart_fail; break; - case TOP_end: - RETURN(TE_OK); case TOP_fail: - RETURN(TE_FAIL); + return TE_FAIL; default: ASSERT(0); } } -#undef RETURN - - do_return: - if (var != def_vars) { - erts_free(ERTS_ALC_T_LOADER_TMP, (void *) var); - } - return rval; } static void diff --git a/erts/emulator/utils/beam_makeops b/erts/emulator/utils/beam_makeops index f805e7cc64..86bfb5d746 100755 --- a/erts/emulator/utils/beam_makeops +++ b/erts/emulator/utils/beam_makeops @@ -1504,8 +1504,6 @@ sub tr_gen_from { my($var_num) = 0; my(@code); my($min_window) = 0; - my(@fix_rest_args); - my(@fix_pred_funcs); my($op, $ref); # Loop variables. my $where = "left side of transformation in line $line: "; my %var_used = %$used_ref; @@ -1530,8 +1528,17 @@ sub tr_gen_from { my $var; my(@args); - push(@fix_pred_funcs, scalar(@code)); - push(@code, [$name, @ops]); + foreach $var (@ops) { + error($where, "variable '$var' unbound") + unless defined $var{$var}; + if ($var_type{$var} eq 'scalar') { + push(@args, "var[$var{$var}]"); + } else { + push(@args, "rest_args"); + } + } + my $pi = tr_next_index(\@pred_table, \%pred_table, $name, @args); + push(@code, make_op("$name()", 'pred', $pi)); next; } @@ -1595,12 +1602,16 @@ sub tr_gen_from { $may_fail = 1; push(@code, &make_op($var, 'is_same_var', $var{$var})); } elsif ($type eq '*') { - # - # Reserve a hole for a 'rest_args' instruction. - # + foreach my $type (values %var_type) { + error("only one use of a '*' variable is " . + "allowed on the left hand side of " . + "a transformation") + if $type eq 'array'; + } $ignored_var = ''; - push(@fix_rest_args, scalar(@code)); - push(@code, $var); + $var{$var} = 'unnumbered'; + $var_type{$var} = 'array'; + push(@code, make_op($var, 'rest_args')); } elsif ($var_used{$var}) { $ignored_var = ''; $var_type{$var} = 'scalar'; @@ -1629,38 +1640,6 @@ sub tr_gen_from { # push(@code, make_op($may_fail ? '' : 'always reached', 'commit')); - # - # If there is an rest_args instruction, we must insert its correct - # variable number (higher than any other). - # - my $index; - &error("only one use of a '*' variable is allowed on the left hand side of a transformation") - if @fix_rest_args > 1; - foreach $index (@fix_rest_args) { - my $var = $code[$index]; - $var{$var} = $var_num++; - $var_type{$var} = 'array'; - splice(@code, $index, 1, &make_op($var, 'rest_args', $var{$var})); - } - - foreach $index (@fix_pred_funcs) { - my($name, @ops) = @{$code[$index]}; - my(@args); - my $var; - - foreach $var (@ops) { - &error($where, "variable '$var' unbound") - unless defined $var{$var}; - if ($var_type{$var} eq 'scalar') { - push(@args, "var[$var{$var}]"); - } else { - push(@args, "var+$var{$var}"); - } - } - my $pi = tr_next_index(\@pred_table, \%pred_table, $name, @args); - splice(@code, $index, 1, make_op("$name()", 'pred', $pi)); - } - $te_max_vars = $var_num if $te_max_vars < $var_num; [$min_window, \%var, \%var_type, \@code]; @@ -1697,7 +1676,7 @@ sub tr_gen_to { if ($var_type{$var} eq 'scalar') { push(@args, "var[$var{$var}]"); } else { - push(@args, "var+$var{$var}"); + push(@args, "rest_args"); } } pop(@code); # Get rid of 'commit' instruction @@ -1725,7 +1704,7 @@ sub tr_gen_to { my($var, $type, $type_val) = @$op; if ($type eq '*') { - push(@code, make_op($var, 'store_rest_args', $var{$var})); + push(@code, make_op($var, 'store_rest_args')); } elsif ($var ne '') { &error($where, "variable '$var' unbound") unless defined $var{$var}; |