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cgen: optimize map op_assign (#7162)

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Uwe Krüger 2020-12-06 15:20:31 +01:00 committed by GitHub
parent 0c50f0c9dc
commit 853dcc33c7
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1 changed files with 8 additions and 37 deletions
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45
vlib/v/gen/cgen.v
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@ -3801,8 +3801,12 @@ fn (mut g Gen) index_expr(node ast.IndexExpr) {
elem_typ := g.table.get_type_symbol(info.value_type)
get_and_set_types := elem_typ.kind in [.struct_, .map]
if g.is_assign_lhs && !g.is_array_set && !get_and_set_types {
g.is_array_set = true
g.write('map_set(')
if g.assign_op == .assign || info.value_type == table.string_type {
g.is_array_set = true
g.write('map_set(')
} else {
g.write('*(($elem_type_str*)map_get_and_set(')
}
if !left_is_ptr || node.left_type.has_flag(.shared_f) {
g.write('&')
}
@ -3821,42 +3825,9 @@ fn (mut g Gen) index_expr(node ast.IndexExpr) {
} else {
g.write(', &($elem_type_str[]) { ')
}
if g.assign_op != .assign &&
g.assign_op in token.assign_tokens && info.value_type != table.string_type {
g.write('(*(int*)map_get(')
if left_is_ptr && !node.left_type.has_flag(.shared_f) {
g.write('*')
}
g.expr(node.left)
if node.left_type.has_flag(.shared_f) {
if left_is_ptr {
g.write('->val')
} else {
g.write('.val')
}
}
g.write(', ')
g.expr(node.index)
if g.assign_op != .assign && info.value_type != table.string_type {
zero := g.type_default(info.value_type)
if elem_typ.kind == .function {
g.write(', &(voidptr[]){ $zero }))')
} else {
g.write(', &($elem_type_str[]){ $zero }))')
}
op := match g.assign_op {
.mult_assign { '*' }
.plus_assign { '+' }
.minus_assign { '-' }
.div_assign { '/' }
.xor_assign { '^' }
.mod_assign { '%' }
.or_assign { '|' }
.and_assign { '&' }
.left_shift_assign { '<<' }
.right_shift_assign { '>>' }
else { '' }
}
g.write(' $op ')
g.write('$zero }))')
}
} else if (g.inside_map_postfix || g.inside_map_infix) ||
(g.is_assign_lhs && !g.is_array_set && get_and_set_types) {