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comparison src/vim9compile.c @ 26729:b969fdb8cd46 v8.2.3893

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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
comparison
equal deleted inserted replaced
26728:71ae885c1426 26729:b969fdb8cd46
1961 var_start = arg; 1961 var_start = arg;
1962 for (var_idx = 0; var_idx == 0 || var_idx < var_count; var_idx++) 1962 for (var_idx = 0; var_idx == 0 || var_idx < var_count; var_idx++)
1963 { 1963 {
1964 int instr_count = -1; 1964 int instr_count = -1;
1965 int save_lnum; 1965 int save_lnum;
1966 int skip_store = FALSE;
1966 1967
1967 if (var_start[0] == '_' && !eval_isnamec(var_start[1])) 1968 if (var_start[0] == '_' && !eval_isnamec(var_start[1]))
1968 { 1969 {
1969 // Ignore underscore in "[a, _, b] = list". 1970 // Ignore underscore in "[a, _, b] = list".
1970 if (var_count > 0) 1971 if (var_count > 0)
2184 case VAR_ANY: 2185 case VAR_ANY:
2185 case VAR_PARTIAL: 2186 case VAR_PARTIAL:
2186 case VAR_VOID: 2187 case VAR_VOID:
2187 case VAR_INSTR: 2188 case VAR_INSTR:
2188 case VAR_SPECIAL: // cannot happen 2189 case VAR_SPECIAL: // cannot happen
2189 generate_PUSHNR(cctx, 0); 2190 // This is skipped for local variables, they are
2191 // always initialized to zero.
2192 if (lhs.lhs_dest == dest_local)
2193 skip_store = TRUE;
2194 else
2195 generate_PUSHNR(cctx, 0);
2190 break; 2196 break;
2191 } 2197 }
2192 } 2198 }
2193 if (var_count == 0) 2199 if (var_count == 0)
2194 end = p; 2200 end = p;
2276 // Set the type in the list or dict, so that it can be checked, 2282 // Set the type in the list or dict, so that it can be checked,
2277 // also in legacy script. Not for "list<any> = val", then the 2283 // also in legacy script. Not for "list<any> = val", then the
2278 // type of "val" is used. 2284 // type of "val" is used.
2279 generate_SETTYPE(cctx, lhs.lhs_type); 2285 generate_SETTYPE(cctx, lhs.lhs_type);
2280 2286
2281 if (generate_store_lhs(cctx, &lhs, instr_count) == FAIL) 2287 if (!skip_store && generate_store_lhs(cctx, &lhs,
2288 instr_count, is_decl) == FAIL)
2282 { 2289 {
2283 cctx->ctx_lnum = save_lnum; 2290 cctx->ctx_lnum = save_lnum;
2284 goto theend; 2291 goto theend;
2285 } 2292 }
2286 } 2293 }