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cgen: cleanup in if_expr() (#13754)

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yuyi 2022-03-17 07:09:49 +08:00 committed by GitHub
parent 7a4715288c
commit 136f39a2d4
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1 changed files with 67 additions and 72 deletions
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139
vlib/v/gen/c/if.v
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@ -115,89 +115,84 @@ fn (mut g Gen) if_expr(node ast.IfExpr) {
cvar_name := guard_vars[guard_idx] cvar_name := guard_vars[guard_idx]
g.writeln('\tIError err = ${cvar_name}.err;') g.writeln('\tIError err = ${cvar_name}.err;')
} }
} else { } else if branch.cond is ast.IfGuardExpr {
match branch.cond { mut var_name := guard_vars[i]
ast.IfGuardExpr { mut short_opt := false
mut var_name := guard_vars[i] if var_name == '' {
mut short_opt := false short_opt = true // we don't need a further tmp, so use the one we'll get later
if var_name == '' { var_name = g.new_tmp_var()
short_opt = true // we don't need a further tmp, so use the one we'll get later guard_vars[i] = var_name // for `else`
var_name = g.new_tmp_var() g.tmp_count--
guard_vars[i] = var_name // for `else` g.writeln('if (${var_name}.state == 0) {')
g.tmp_count-- } else {
g.writeln('if (${var_name}.state == 0) {') g.write('if ($var_name = ')
g.expr(branch.cond.expr)
g.writeln(', ${var_name}.state == 0) {')
}
if short_opt || branch.cond.vars[0].name != '_' {
base_type := g.base_type(branch.cond.expr_type)
if short_opt {
cond_var_name := if branch.cond.vars[0].name == '_' {
'_dummy_${g.tmp_count + 1}'
} else { } else {
g.write('if ($var_name = ') branch.cond.vars[0].name
g.expr(branch.cond.expr)
g.writeln(', ${var_name}.state == 0) {')
} }
if short_opt || branch.cond.vars[0].name != '_' { g.write('\t$base_type $cond_var_name = ')
base_type := g.base_type(branch.cond.expr_type) g.expr(branch.cond.expr)
if short_opt { g.writeln(';')
cond_var_name := if branch.cond.vars[0].name == '_' { } else {
'_dummy_${g.tmp_count + 1}' mut is_auto_heap := false
} else { if branch.stmts.len > 0 {
branch.cond.vars[0].name scope := g.file.scope.innermost(ast.Node(branch.stmts[branch.stmts.len - 1]).pos().pos)
} if v := scope.find_var(branch.cond.vars[0].name) {
g.write('\t$base_type $cond_var_name = ') is_auto_heap = v.is_auto_heap
g.expr(branch.cond.expr) }
g.writeln(';') }
if branch.cond.vars.len == 1 {
left_var_name := c_name(branch.cond.vars[0].name)
if is_auto_heap {
g.writeln('\t$base_type* $left_var_name = HEAP($base_type, *($base_type*)${var_name}.data);')
} else { } else {
mut is_auto_heap := false g.writeln('\t$base_type $left_var_name = *($base_type*)${var_name}.data;')
if branch.stmts.len > 0 { }
scope := g.file.scope.innermost(ast.Node(branch.stmts[branch.stmts.len - 1]).pos().pos) } else if branch.cond.vars.len > 1 {
if v := scope.find_var(branch.cond.vars[0].name) { for vi, var in branch.cond.vars {
is_auto_heap = v.is_auto_heap left_var_name := c_name(var.name)
} sym := g.table.sym(branch.cond.expr_type)
} if sym.kind == .multi_return {
if branch.cond.vars.len == 1 { mr_info := sym.info as ast.MultiReturn
left_var_name := c_name(branch.cond.vars[0].name) if mr_info.types.len == branch.cond.vars.len {
if is_auto_heap { var_typ := g.typ(mr_info.types[vi])
g.writeln('\t$base_type* $left_var_name = HEAP($base_type, *($base_type*)${var_name}.data);') if is_auto_heap {
} else { g.writeln('\t$var_typ* $left_var_name = (HEAP($base_type, *($base_type*)${var_name}.data).arg$vi);')
g.writeln('\t$base_type $left_var_name = *($base_type*)${var_name}.data;') } else {
} g.writeln('\t$var_typ $left_var_name = (*($base_type*)${var_name}.data).arg$vi;')
} else if branch.cond.vars.len > 1 {
for vi, var in branch.cond.vars {
left_var_name := c_name(var.name)
sym := g.table.sym(branch.cond.expr_type)
if sym.kind == .multi_return {
mr_info := sym.info as ast.MultiReturn
if mr_info.types.len == branch.cond.vars.len {
var_typ := g.typ(mr_info.types[vi])
if is_auto_heap {
g.writeln('\t$var_typ* $left_var_name = (HEAP($base_type, *($base_type*)${var_name}.data).arg$vi);')
} else {
g.writeln('\t$var_typ $left_var_name = (*($base_type*)${var_name}.data).arg$vi;')
}
}
} }
} }
} }
} }
} }
} }
else { }
mut no_needs_par := false } else {
if branch.cond is ast.InfixExpr { mut no_needs_par := false
if branch.cond.op == .key_in && branch.cond.left !is ast.InfixExpr if branch.cond is ast.InfixExpr {
&& branch.cond.right is ast.ArrayInit { if branch.cond.op == .key_in && branch.cond.left !is ast.InfixExpr
no_needs_par = true && branch.cond.right is ast.ArrayInit {
} no_needs_par = true
}
if no_needs_par {
g.write('if ')
} else {
g.write('if (')
}
g.expr(branch.cond)
if no_needs_par {
g.writeln(' {')
} else {
g.writeln(') {')
}
} }
} }
if no_needs_par {
g.write('if ')
} else {
g.write('if (')
}
g.expr(branch.cond)
if no_needs_par {
g.writeln(' {')
} else {
g.writeln(') {')
}
} }
if needs_tmp_var { if needs_tmp_var {
if node.is_expr && g.table.sym(node.typ).kind == .sum_type { if node.is_expr && g.table.sym(node.typ).kind == .sum_type {