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Phase 7i: byte indexing p[i] / p[i] = v (retire peek8/poke8)

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Raw byte access is now indexing, not C-style peek/poke:

  peek8(src, i)          -> src[i]        (reads a byte, widened to int)
  poke8(out, j, r)       -> out[j] = r    (narrows the int to a byte)

E_INDEX on a non-slice pointer/string lowers to a `getelementptr i8` + load/zext
(read) or trunc/store (write) — byte-identical to the old peek8/poke8, so the
migration reproduces the compiler exactly. A "byte" element type (llty i8) drives
the widen/narrow. The compiler's own byte work now reads naturally, e.g.
`is_slice_ty` is `t[0] == 91 and t[1] == 93`.

Subtlety fixed on the way: g_addr_ty (the out-param carrying the indexed element
type) must be set AFTER evaluating the index expression, since a member/index in
the index would otherwise clobber it — doing it early made a byte read load a
full pointer from a byte address and crash the self-compile.

Two reseeds: add byte-index support keeping peek8/poke8, then migrate 148 call
sites and delete the intrinsics (+ the now-dead emit_gep_i8). Vocabulary drops
peek8/poke8. Reseeded (22604 lines); C-free fixpoint holds; goldens identical;
18/18; vocab clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-08-28 02:01:59 +03:00
parent 3aaf983cf5
commit feb3a71e56
25 changed files with 3309 additions and 3388 deletions
Download patch file Download diff file Expand all files Collapse all files

2
tools/editors/jetbrains/src/main/kotlin/io/ludic/ide/LudicTokens.kt
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@ -66,7 +66,7 @@ object LudicVocabulary {
"ui_focused", "ui_visible", "key", "reg", "set_reg", "self", "save", "load",
"status", "print", "str", "quit",
// compiler intrinsics: the floor the Ludic-written runtime stands on
"mem_alloc", "mem_realloc", "mem_free", "mem_copy", "mem_set", "peek8", "poke8", "peek32",
"mem_alloc", "mem_realloc", "mem_free", "mem_copy", "mem_set", "peek32",
"os_argc", "os_arg", "file_stderr", "file_stdout",
"poke32", "peekp", "pokep", "peekf", "pokef", "ptr_add",
"as_fixed", "as_int", "file_open", "file_read", "file_write",

2
tools/editors/shared/ludic.tmLanguage.json
View file

@ -209,7 +209,7 @@
{
"comment": "compiler intrinsics — these lower straight to libc or the OS",
"name": "support.function.intrinsic.ludic",
"match": "\\b(mem_alloc|mem_realloc|mem_free|mem_copy|mem_set|peek8|poke8|peek32|poke32|peekp|pokep|peekf|pokef|ptr_add|as_fixed|as_int|file_open|file_read|file_write|file_seek|file_tell|file_close|read_byte|write_byte|str_len|os_exit|os_time|os_argc|os_arg|file_stderr|file_stdout|is_windowed|game_title|win_open|win_poll|win_present|win_running|win_close)\\b(?=\\s*\\()"
"match": "\\b(mem_alloc|mem_realloc|mem_free|mem_copy|mem_set|peek32|poke32|peekp|pokep|peekf|pokef|ptr_add|as_fixed|as_int|file_open|file_read|file_write|file_seek|file_tell|file_close|read_byte|write_byte|str_len|os_exit|os_time|os_argc|os_arg|file_stderr|file_stdout|is_windowed|game_title|win_open|win_poll|win_present|win_running|win_close)\\b(?=\\s*\\()"
}
]
},

2
tools/editors/vscode/syntaxes/ludic.tmLanguage.json
View file

@ -209,7 +209,7 @@
{
"comment": "compiler intrinsics — these lower straight to libc or the OS",
"name": "support.function.intrinsic.ludic",
"match": "\\b(mem_alloc|mem_realloc|mem_free|mem_copy|mem_set|peek8|poke8|peek32|poke32|peekp|pokep|peekf|pokef|ptr_add|as_fixed|as_int|file_open|file_read|file_write|file_seek|file_tell|file_close|read_byte|write_byte|str_len|os_exit|os_time|os_argc|os_arg|file_stderr|file_stdout|is_windowed|game_title|win_open|win_poll|win_present|win_running|win_close)\\b(?=\\s*\\()"
"match": "\\b(mem_alloc|mem_realloc|mem_free|mem_copy|mem_set|peek32|poke32|peekp|pokep|peekf|pokef|ptr_add|as_fixed|as_int|file_open|file_read|file_write|file_seek|file_tell|file_close|read_byte|write_byte|str_len|os_exit|os_time|os_argc|os_arg|file_stderr|file_stdout|is_windowed|game_title|win_open|win_poll|win_present|win_running|win_close)\\b(?=\\s*\\()"
}
]
},

2
tools/ludic-tools/ludic_syntax.h
View file

@ -154,8 +154,6 @@ static const LBuiltin LUDIC_INTRINSICS[] = {
{"mem_free","mem_free(p: ptr)","Release an allocation."},
{"mem_copy","mem_copy(dst: ptr, src: ptr, n: int)","memcpy."},
{"mem_set","mem_set(p: ptr, byte: int, n: int)","memset."},
{"peek8","peek8(p: ptr, off: int) -> int","Read one byte."},
{"poke8","poke8(p: ptr, off: int, v: int)","Write one byte."},
{"peek32","peek32(p: ptr, off: int) -> int","Read a 32-bit word."},
{"poke32","poke32(p: ptr, off: int, v: int)","Write a 32-bit word."},
{"peekp","peekp(p: ptr, off: int) -> ptr","Read a pointer-sized word."},