diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/library.js | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/src/library.js b/src/library.js index 61ef90fd..03dc5cbd 100644 --- a/src/library.js +++ b/src/library.js @@ -3696,14 +3696,17 @@ LibraryManager.library = { llvm_memcpy_p0i8_p0i8_i32: 'memcpy', llvm_memcpy_p0i8_p0i8_i64: 'memcpy', - memmove__deps: ['memcpy'], memmove: function(dest, src, num, idunno) { - // not optimized! - if (num === 0) return; // will confuse malloc if 0 - var tmp = _malloc(num); - _memcpy(tmp, src, num); - _memcpy(dest, tmp, num); - _free(tmp); + if (src < dest && dest < src + num) { + // Copy backwards in a safe manner + src += num; + dest += num; + while (num--) { + {{{ makeSetValue('--dest', '0', makeGetValue('--src', '0', 'i8'), 'i8') }}}; + } + } else { + {{{ makeCopyValues('dest', 'src', 'num', 'null') }}}; + } }, llvm_memmove_i32: 'memmove', llvm_memmove_i64: 'memmove', |