mlugg 9c3670fc93 compiler: implement analysis-local comptime-mutable memory ... This commit changes how we represent comptime-mutable memory (`comptime var`) in the compiler in order to implement the intended behavior that references to such memory can only exist at comptime. It does *not* clean up the representation of mutable values, improve the representation of comptime-known pointers, or fix the many bugs in the comptime pointer access code. These will be future enhancements. Comptime memory lives for the duration of a single Sema, and is not permitted to escape that one analysis, either by becoming runtime-known or by becoming comptime-known to other analyses. These restrictions mean that we can represent comptime allocations not via Decl, but with state local to Sema - specifically, the new `Sema.comptime_allocs` field. All comptime-mutable allocations, as well as any comptime-known const allocs containing references to such memory, live in here. This allows for relatively fast checking of whether a value references any comptime-mtuable memory, since we need only traverse values up to pointers: pointers to Decls can never reference comptime-mutable memory, and pointers into `Sema.comptime_allocs` always do. This change exposed some faulty pointer access logic in `Value.zig`. I've fixed the important cases, but there are some TODOs I've put in which are definitely possible to hit with sufficiently esoteric code. I plan to resolve these by auditing all direct accesses to pointers (most of them ought to use Sema to perform the pointer access!), but for now this is sufficient for all realistic code and to get tests passing. This change eliminates `Zcu.tmp_hack_arena`, instead using the Sema arena for comptime memory mutations, which is possible since comptime memory is now local to the current Sema. This change should allow `Decl` to store only an `InternPool.Index` rather than a full-blown `ty: Type, val: Value`. This commit does not perform this refactor.		2024-03-25 14:49:41 +00:00
..
conflicting_externs	categorize behavior/bugs/<issueno>.zig tests	2024-01-06 16:49:41 -08:00
hasdecl
import
namespace_depends_on_compile_var
pub_enum
usingnamespace	compiler_rt: fix arm hard-float f16 abi	2023-09-19 09:37:53 -07:00
abs.zig	x86_64+macho: pass more behavior tests	2024-02-06 19:01:17 +01:00
align.zig	compiler: implement analysis-local comptime-mutable memory	2024-03-25 14:49:41 +00:00
alignof.zig	test/behavior: replace all 'comptime expect' with 'comptime assert'	2024-01-15 20:55:01 +11:00
array.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
asm.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
async_fn.zig	test/behavior: replace all 'comptime expect' with 'comptime assert'	2024-01-15 20:55:01 +11:00
atomics.zig	std.builtin: make atomic order fields lowercase	2024-03-11 07:09:10 -07:00
await_struct.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
basic.zig	spirv: make generic globals invocation-local	2024-03-18 19:13:50 +01:00
bit_shifting.zig	categorize behavior/bugs/<issueno>.zig tests	2024-01-06 16:49:41 -08:00
bitcast.zig	disable failing behavior test: "comptime bitcast with fields following f80"	2024-03-21 19:07:08 -07:00
bitreverse.zig	x86_64+macho: pass more behavior tests	2024-02-06 19:01:17 +01:00
bool.zig	spirv: air int_from_bool	2024-02-04 19:09:29 +01:00
builtin_functions_returning_void_or_noreturn.zig	std.builtin: make atomic order fields lowercase	2024-03-11 07:09:10 -07:00
byteswap.zig	Add 64bit byteswap case, use fewer locals	2024-03-18 12:40:41 +01:00
byval_arg_var.zig	spirv: enable passing tests	2024-03-18 19:13:51 +01:00
call.zig	test/behavior: replace all 'comptime expect' with 'comptime assert'	2024-01-15 20:55:01 +11:00
call_tail.zig	spirv: disable failing tests	2023-09-23 12:36:44 -07:00
cast.zig	spirv: enable passing tests	2024-03-18 19:13:51 +01:00
cast_int.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
comptime_memory.zig	compiler: implement analysis-local comptime-mutable memory	2024-03-25 14:49:41 +00:00
const_slice_child.zig	spirv: update failing / passing tests	2023-10-15 20:08:18 +02:00
decltest.zig	spirv: more passing tests	2023-05-20 17:30:22 +02:00
defer.zig	spirv: update failing / passing tests	2023-10-15 20:08:18 +02:00
destructure.zig	Ast: fix comptime destructure	2024-03-17 15:23:16 -07:00
duplicated_test_names.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
empty_file_level_struct.zig	fix overflow found while fuzzing	2022-12-23 23:10:04 +02:00
empty_file_level_union.zig	fix overflow found while fuzzing	2022-12-23 23:10:04 +02:00
empty_tuple_fields.zig	setup spirv backend in behavior tests	2023-05-11 20:31:52 +02:00
empty_union.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
enum.zig	behavior: add tests for #18816	2024-03-06 21:26:38 +00:00
error.zig	spirv: enable passing tests	2024-03-18 19:13:51 +01:00
eval.zig	compiler: implement analysis-local comptime-mutable memory	2024-03-25 14:49:41 +00:00
export_builtin.zig	std.builtin: make link mode fields lowercase	2024-03-11 07:09:10 -07:00
export_c_keywords.zig	cbe: fix non-msvc externs and exports	2024-01-03 02:52:25 -05:00
export_keyword.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
export_self_referential_type_info.zig	all: zig fmt and rename "@XToY" to "@YFromX"	2023-06-19 12:34:42 -07:00
extern.zig	Sema: perform codegen for anon decl created by @extern	2024-03-09 04:52:06 +00:00
extern_struct_zero_size_fields.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
field_parent_ptr.zig	spirv: fieldParentPtr	2023-10-16 20:27:28 -04:00
file_to_embed.txt	rename behavior test to better describe what it does	2023-10-23 17:28:10 -07:00
floatop.zig	Merge pull request #19337 from Snektron/spirv-globals	2024-03-19 09:34:59 +01:00
fn.zig	x86_64+macho: pass more behavior tests	2024-02-06 19:01:17 +01:00
fn_delegation.zig	spirv: more passing tests	2023-05-20 17:30:22 +02:00
fn_in_struct_in_comptime.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
for.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
generics.zig	Sema: allow param instructions to clobber inst_map	2024-03-17 14:42:12 +02:00
globals.zig	spirv: make rusticl the primary testing implementation	2024-02-09 09:27:08 +03:30
hasdecl.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
hasfield.zig
if.zig	categorize behavior/bugs/<issueno>.zig tests	2024-01-06 16:49:41 -08:00
import.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
import_c_keywords.zig	x86_64+macho: pass more behavior tests	2024-02-06 19:01:17 +01:00
incomplete_struct_param_tld.zig	stage2: sparc64: Skip unimplemented tests	2022-12-10 21:51:46 +07:00
inline_switch.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
int128.zig	x86_64: implement some todos	2023-12-03 10:24:03 -05:00
int_comparison_elision.zig	categorize behavior/bugs/<issueno>.zig tests	2024-01-06 16:49:41 -08:00
int_div.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
ir_block_deps.zig	spirv: update failing / passing tests	2023-10-15 20:08:18 +02:00
lower_strlit_to_vector.zig	spirv: update failing / passing tests	2023-10-15 20:08:18 +02:00
math.zig	test: skip new failing tests for spirv	2024-02-15 18:44:24 +03:30
maximum_minimum.zig	spirv: vectorize max, min	2024-02-04 19:09:31 +01:00
member_func.zig	Zir: eliminate field_call_bind and field_call_bind_named	2023-05-20 12:27:48 -07:00
memcpy.zig	Sema: ensure slice_ptr produces the correct type	2023-12-23 02:08:58 -05:00
memset.zig	categorize behavior/bugs/<issueno>.zig tests	2024-01-06 16:49:41 -08:00
merge_error_sets.zig	spirv: update failing / passing tests	2023-10-15 20:08:18 +02:00
muladd.zig	x86_64+macho: pass more behavior tests	2024-02-06 19:01:17 +01:00
multiple_externs_with_conflicting_types.zig	x86_64+macho: pass more behavior tests	2024-02-06 19:01:17 +01:00
namespace_depends_on_compile_var.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
nan.zig	x86_64: fix compiler rt test failures	2023-10-29 07:20:36 -04:00
null.zig	spirv: air is_(non_)null_ptr, optional_payload_ptr	2024-02-04 19:09:30 +01:00
optional.zig	spirv: enable passing tests	2024-03-18 19:13:51 +01:00
packed-struct.zig	x86_64: fix packed load	2024-02-12 05:25:07 +01:00
packed-union.zig	Fix some comptime packed struct issues	2024-01-29 13:09:17 -08:00
packed_struct_explicit_backing_int.zig	std.builtin.Endian: make the tags lower case	2023-10-31 21:37:35 -04:00
pointers.zig	spirv: enable passing tests	2024-03-18 19:13:51 +01:00
popcount.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
prefetch.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
ptrcast.zig	Remove all usages of std.mem.copy and remove std.mem.set (#18143)	2023-11-29 16:03:02 -05:00
ptrfromint.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
pub_enum.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
ref_var_in_if_after_if_2nd_switch_prong.zig	spirv: more passing tests	2023-05-20 17:30:22 +02:00
reflection.zig	spirv: more passing tests	2023-05-20 17:30:22 +02:00
return_address.zig	enable passing behavior tests	2023-05-31 18:04:33 +02:00
saturating_arithmetic.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
select.zig	x86_64: implement @select	2024-02-25 11:22:10 +01:00
shuffle.zig	x86_64: implement @shuffle	2024-02-25 11:22:10 +01:00
sizeof_and_typeof.zig	Sema: replace uses of toUnsignedInt with toUnsignedIntAdvanced	2024-01-20 12:21:05 -08:00
slice.zig	test/behavior: fix test type check for multi-ptr slice	2024-01-15 20:55:01 +11:00
slice_sentinel_comptime.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
src.zig	behavior: correct tests after #18816	2024-03-06 21:26:38 +00:00
stage2_wasm_div.zig	Replace @panic with unreachable, add test	2023-08-23 20:34:59 +01:00
string_literals.zig	categorize behavior/bugs/<issueno>.zig tests	2024-01-06 16:49:41 -08:00
struct.zig	behavior: add tests for #18816	2024-03-06 21:26:38 +00:00
struct_contains_null_ptr_itself.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
struct_contains_slice_of_itself.zig	Revert "Revert "Merge pull request #17657 from Snektron/spirv-recursive-ptrs""	2023-10-23 06:27:12 -04:00
switch.zig	Sema: reset block error return trace index between cases	2024-03-08 07:30:32 -08:00
switch_on_captured_error.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
switch_prong_err_enum.zig	spirv: update failing / passing tests	2023-10-15 20:08:18 +02:00
switch_prong_implicit_cast.zig	spirv: update failing / passing tests	2023-10-15 20:08:18 +02:00
this.zig	categorize behavior/bugs/<issueno>.zig tests	2024-01-06 16:49:41 -08:00
threadlocal.zig	Remove all usages of std.mem.copy and remove std.mem.set (#18143)	2023-11-29 16:03:02 -05:00
truncate.zig	spirv: vectorize int_cast, trunc	2024-02-04 19:09:31 +01:00
try.zig	categorize behavior/bugs/<issueno>.zig tests	2024-01-06 16:49:41 -08:00
tuple.zig	std.builtin: make container layout fields lowercase	2024-03-11 07:09:07 -07:00
tuple_declarations.zig	std.builtin: make container layout fields lowercase	2024-03-11 07:09:07 -07:00
type.zig	AstGen: disallow alignment on function types	2024-03-17 03:06:17 +01:00
type_info.zig	AstGen: disallow alignment on function types	2024-03-17 03:06:17 +01:00
type_info_mul_linksection_addrspace_decls.zig	Zir: add missing extra index for linksection_or_addspace	2023-11-25 11:39:37 +00:00
type_info_only_pub_decls.zig	spirv: update failing / passing tests	2023-10-15 20:08:18 +02:00
typename.zig	AstGen: disallow alignment on function types	2024-03-17 03:06:17 +01:00
undefined.zig	x86_64: implement ret_safe	2024-02-12 05:25:07 +01:00
underscore.zig	spirv: enable passing tests	2023-09-23 12:36:56 -07:00
union.zig	disable failing behavior test: "reinterpret extern union"	2024-03-21 20:09:20 -07:00
union_with_members.zig	enable passing behavior tests	2023-05-31 18:04:33 +02:00
usingnamespace.zig	Sema: fix spurious type has no namespace error	2024-03-17 14:42:12 +02:00
var_args.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
vector.zig	spirv: enable passing tests	2024-03-18 19:13:51 +01:00
void.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
wasm.zig	test: update behavior to silence 'var is never mutated' errors	2023-11-19 09:57:03 +00:00
while.zig	spirv: enable passing tests	2024-03-18 19:13:51 +01:00
widening.zig	x86_64+macho: pass more behavior tests	2024-02-06 19:01:17 +01:00
wrapping_arithmetic.zig	spirv: update tests	2024-02-04 19:09:33 +01:00
zero.bin	Module: fix @embedFile of files containing zero bytes	2024-02-22 12:33:53 -08:00