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407dc6eee4660bb0744c55f4565be77501ec7d37
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11580 Commits

Author SHA1 Message Date
mlugg
407dc6eee4 Liveness: avoid emitting unused instructions or marking their operands as used 
Backends want to avoid emitting unused instructions which do not have
side effects: to that end, they all have `Liveness.isUnused` checks for
many instructions. However, checking this in the backends avoids a lot
of potential optimizations. For instance, if a nested field is loaded,
then the first field access would still be emitted, since its result is
used by the next access (which is then unreferenced).

To elide more instructions, Liveness can track this data instead. For
operands which do not have to be lowered (i.e. are not side effecting
and are not something special like `arg), Liveness can ignore their
operand usages, and push the unused information further up, potentially
marking many more instructions as unreferenced.

In doing this, I also uncovered a bug in the LLVM backend relating to
discarding the result of `@cVaArg`, which this change fixes. A behaviour
test has been added to cover it.
 2023-04-20 20:28:48 +01:00
mlugg
4486f27126 print_air: print new Liveness data 
`try`, `try_ptr`, and `block` now have extra payloads.
 2023-04-20 20:28:48 +01:00
Jacob Young
02a8b66b00 Liveness: add a liveness verification pass 
This code only runs in a debug zig compiler, similar to verifying llvm modules.
 2023-04-20 20:28:47 +01:00
Jacob Young
6f210b74ee print_air: allow dumping air without liveness 
This is useful for debug printing air when liveness is broken.
 2023-04-20 20:28:04 +01:00
mlugg
8258530c39 Liveness: control flow analysis 
This is a partial rewrite of Liveness, so has some other notable changes:
- A proper multi-pass system to prevent code duplication
- Better logging
- Minor bugfixes
 2023-04-20 20:28:04 +01:00
mlugg
fac120bc3a Module: mark function body dependencies, don't re-analyze anonymous decls 2023-04-20 09:09:15 -07:00
mlugg
d5f1a8823e Sema: allow ptr field access on pointer-to-array 
Also remove an incorrect piece of logic which allowed fetching the 'len'
property on non-single-ptrs (e.g. many-ptrs) and add a corresponding
compile error test case.

Resolves: #4765
 2023-04-20 09:05:22 -07:00
Tw
31b6d14bf7 llvm: emit metadata for exported global variables (#15349) 
* llvm: emit metadata for global variable

One use case is to genearte BTF information from global variable's metadata.

Signed-off-by: Tw <weii.tan>
 2023-04-20 11:12:41 +00:00
kcbanner
a1aa55ebe5 compilation: fix generating coff debug info on -gnu 
The issue with just passing `-gcodeview` is that it's not part of
the `OPT_g_Group` in `clang/Driver/Options.td`, so it doesn't trigger
debug info to be generated.

Passing only `-g` is sufficient on MSVC, as there is logic in `Clang.cpp`
which enables codeview if that is the default for the toolchain. Since
the default for -gnu is not codeview, we do pass `-gcodeview` in that case.
 2023-04-18 21:29:20 -07:00
Andrew Kelley
0eebc25880 Merge pull request #15299 from truemedian/std-http 
std.http: curated error sets and custom Headers
 2023-04-18 19:56:24 -07:00
hequn
e1cc70ba11 Assembly file add soft float option for mips (#15340) 2023-04-18 21:41:16 -04:00
kcbanner
d2a799c65a coff: support allow_shlib_undefined 2023-04-18 18:23:05 -07:00
Andrew Kelley
30fc160874 Merge pull request #15302 from jacobly0/x86_64-non-liveness 
x86_64: liveness independent fixes
 2023-04-18 17:28:19 -07:00
Nameless
a23c8662b4 std.http: pass Method to request directly, parse trailing headers 2023-04-18 10:28:53 -05:00
Jakub Konka
8ba937c787 Merge pull request #15339 from ziglang/link-and-x86_64-cleanups 
Misc cleanups
 2023-04-18 06:24:16 +02:00
Nameless
85221b4e97 std.http: curate some Server errors, fix reading chunked bodies 2023-04-17 19:16:01 -05:00
Nameless
134294230a std.http: add Headers 2023-04-17 19:15:55 -05:00
kcbanner
40e1fca34b compilation: fix non-zig compilations not using CacheMode.whole 
main: consume --debug-log argument even when logging is disabled
 2023-04-17 13:46:14 -07:00
Loris Cro
3d33a09069 autodoc: more support for linking decls in docs & guides 2023-04-17 20:13:08 +02:00
Jakub Konka
13503b7cba x86_64: clean up formatting functions for Instruction and Operand 2023-04-17 13:43:01 +02:00
Jakub Konka
5bc4417d2a tapi: fix memory bugs in yaml parser 2023-04-17 13:35:39 +02:00
Jacob Young
7e0c6d7edc Sema: fix empty infinite loops 
Closes #15284
 2023-04-17 02:30:10 +03:00
Jacob Young
c1a2da6b78 x86_64: implement packed load and store 2023-04-16 17:05:35 -04:00
Jacob Young
c03771e173 x86_64: fix overflow of extended multiply 2023-04-16 17:05:34 -04:00
Jacob Young
08055f2942 x86_64: fix @clz direction 2023-04-16 17:05:34 -04:00
Jakub Konka
bc804eb841 Merge pull request #15291 from ziglang/x86_64-more-memory 
x86_64: fix memory loads some more
 2023-04-16 15:02:08 +02:00
Jakub Konka
ecc52d859f x86_64: fix loading/storing pointers from linker deferred memory locations 2023-04-15 20:59:51 +02:00
serg
23ac4dd87b fix: print targets 2023-04-15 19:44:56 +03:00
Loris Cro
aa765c1d70 autodoc: add support for defining guide sections 
For example:

//!zig-autodoc-section: Advanced Topics
 2023-04-15 18:26:53 +02:00
Jakub Konka
b82130709d x86_64: cleanup different memory load types 
Split `MCValue.linker_load` into `.load_got`, `.load_direct`, and
`.lea_direct`.
 2023-04-15 11:10:24 +02:00
Jakub Konka
179117c114 x86_64: split MCValue.tlv_reloc into .load_tlv and .lea_tlv 
`.load_tlv` signifies we want to load the value of a TLV
`.lea_tlv` signifies we want to load effective address of a TLV
 2023-04-15 00:57:23 +02:00
Luuk de Gram
61c08d3c7e fix zig cc linker flags for Wasm 
Closes #15258
 2023-04-14 15:18:18 -04:00
Jakub Konka
5e19250a12 Merge pull request #15185 from ziglang/macho-tls 
macho: add TLS support
 2023-04-13 22:54:55 +02:00
Luuk de Gram
25e3851fe0 Merge pull request #15257 from Luukdegram/wasm-tagname 
wasm: Implement `@tagName` instruction
 2023-04-13 19:32:22 +02:00
Krzysztof Wolicki
8bbf62c3b9 autodoc: Handling of explicit values for enum fields 
Fixes to frontend handling of structs
 2023-04-13 17:42:29 +02:00
Krzysztof Wolicki
97b3b36c65 autodoc: Handling of default values for struct fields 2023-04-13 17:42:29 +02:00
Loris Cro
5c9906c231 autodoc: make DeclStatus references long-lived 2023-04-13 17:38:24 +02:00
Jakub Konka
3f35d6984f x86_64: make TLV a separate MCValue 2023-04-13 16:35:45 +02:00
Jakub Konka
887da399eb x86_64: fix load() and store() to accommodate TLV 2023-04-13 11:47:51 +02:00
Jakub Konka
fd52d4537a x86_64: emit pointer to TLV for macho 2023-04-13 11:47:51 +02:00
Jakub Konka
1f6165f621 macho: reference TLV thunks via GOT table 2023-04-13 11:47:51 +02:00
Jakub Konka
094ff60252 macho: emit TLV pointers and variables 2023-04-13 11:47:51 +02:00
Jakub Konka
09b6bd86de macho: cleanup dirtying and writing GOT atoms 2023-04-13 11:47:51 +02:00
Jakub Konka
57f9304275 macho: improve reporting of missing symbols 
Fix a typo in TLV bootstrap symbol: __tlv_bootstrap.
 2023-04-13 11:47:51 +02:00
Jakub Konka
ef645ab175 macho: refactor common logic between synthetic tables 2023-04-13 11:47:51 +02:00
Jakub Konka
38ecaf3ab6 macho: add machinery for emitting TLV refs 2023-04-13 11:47:51 +02:00
Jakub Konka
eba280ce20 macho: refactor relocation type in incremental linker 2023-04-13 11:47:51 +02:00
Jakub Konka
1795b8eb4e macho: emit TLS sections 2023-04-13 11:47:51 +02:00
Jakub Konka
cf9ba2965e x86_64: remove loadMemPtrIntoRegister() now redundant 2023-04-13 11:47:51 +02:00
Jakub Konka
e07120d704 x86_64: simplify genInlineMemset() when setting value in memory 2023-04-13 11:47:51 +02:00