Mercurial > vim
diff src/vim9compile.c @ 26729:b969fdb8cd46 v8.2.3893
patch 8.2.3893: Vim9: many local variables are initialized with an instruction
Commit: https://github.com/vim/vim/commit/5cd647935d0834b3064aa36384b8f6730fadadd6
Author: Bram Moolenaar <Bram@vim.org>
Date: Sat Dec 25 18:23:24 2021 +0000
patch 8.2.3893: Vim9: many local variables are initialized with an instruction
Problem: Vim9: many local variables are initialized with an instruction.
Solution: Initialize local variables to zero to avoid the instructions.
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Sat, 25 Dec 2021 19:30:03 +0100 |
| parents | 1b288eb2fcdc |
| children | a8a4e1e7b111 |
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--- a/src/vim9compile.c +++ b/src/vim9compile.c @@ -1963,6 +1963,7 @@ compile_assignment(char_u *arg, exarg_T { int instr_count = -1; int save_lnum; + int skip_store = FALSE; if (var_start[0] == '_' && !eval_isnamec(var_start[1])) { @@ -2186,7 +2187,12 @@ compile_assignment(char_u *arg, exarg_T case VAR_VOID: case VAR_INSTR: case VAR_SPECIAL: // cannot happen - generate_PUSHNR(cctx, 0); + // This is skipped for local variables, they are + // always initialized to zero. + if (lhs.lhs_dest == dest_local) + skip_store = TRUE; + else + generate_PUSHNR(cctx, 0); break; } } @@ -2278,7 +2284,8 @@ compile_assignment(char_u *arg, exarg_T // type of "val" is used. generate_SETTYPE(cctx, lhs.lhs_type); - if (generate_store_lhs(cctx, &lhs, instr_count) == FAIL) + if (!skip_store && generate_store_lhs(cctx, &lhs, + instr_count, is_decl) == FAIL) { cctx->ctx_lnum = save_lnum; goto theend;