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cgen: minor optimization in return_stmt() (#15434)

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yuyi 2022-08-17 01:21:02 +08:00 committed by GitHub
parent 77fd1419a7
commit dc37386bcc
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1 changed files with 2 additions and 3 deletions
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5
vlib/v/gen/c/cgen.v
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@ -4368,8 +4368,7 @@ fn (mut g Gen) return_stmt(node ast.Return) {
}
// free := g.is_autofree && !g.is_builtin_mod // node.exprs[0] is ast.CallExpr
// Create a temporary variable for the return expression
use_tmp_var = use_tmp_var || !g.is_builtin_mod // node.exprs[0] is ast.CallExpr
if use_tmp_var {
if use_tmp_var || !g.is_builtin_mod {
// `return foo(a, b, c)`
// `tmp := foo(a, b, c); free(a); free(b); free(c); return tmp;`
// Save return value in a temp var so that all args (a,b,c) can be freed
@ -4377,10 +4376,10 @@ fn (mut g Gen) return_stmt(node ast.Return) {
// Just in case of defer statements exists, that the return values cannot
// be modified.
if node.exprs[0] !is ast.Ident || use_tmp_var {
use_tmp_var = true
g.write('$ret_typ $tmpvar = ')
} else {
use_tmp_var = false
g.write_defer_stmts_when_needed()
if !g.is_builtin_mod {
g.autofree_scope_vars(node.pos.pos - 1, node.pos.line_nr, true)
}