mirror of
https://github.com/ziglang/zig.git
synced 2026-01-02 11:33:21 +00:00
771e88951a
```zig
export fn entry() void {
const static = Foo{
.x = 9,
.bar = Bar{ .y = 10 },
};
const runtime = foo(true);
}
fn foo(c: bool) Foo {
return Foo{
.x = 12,
.bar = if (c) bar1() else bar2(),
};
}
fn bar1() Bar {
return Bar{ .y = 34 };
}
fn bar2() Bar {
return Bar{ .y = 56 };
}
```
```llvm
@0 = internal unnamed_addr constant %Foo { i32 9, %Bar { i32 10 } }, align 4
@1 = internal unnamed_addr constant %Bar { i32 34 }, align 4
@2 = internal unnamed_addr constant %Bar { i32 56 }, align 4
define void @entry() #2 !dbg !35 {
Entry:
%runtime = alloca %Foo, align 4
call void @llvm.dbg.declare(metadata %Foo* @0, metadata !39, metadata !DIExpression()), !dbg !50
call fastcc void @foo(%Foo* sret %runtime, i1 true), !dbg !51
call void @llvm.dbg.declare(metadata %Foo* %runtime, metadata !49, metadata !DIExpression()), !dbg !52
ret void, !dbg !53
}
define internal fastcc void @foo(%Foo* nonnull sret, i1) unnamed_addr #2 !dbg !54 {
Entry:
%c = alloca i1, align 1
store i1 %1, i1* %c, align 1
call void @llvm.dbg.declare(metadata i1* %c, metadata !60, metadata !DIExpression()), !dbg !61
%2 = getelementptr inbounds %Foo, %Foo* %0, i32 0, i32 0, !dbg !62
store i32 12, i32* %2, align 4, !dbg !62
%3 = getelementptr inbounds %Foo, %Foo* %0, i32 0, i32 1, !dbg !64
%4 = load i1, i1* %c, align 1, !dbg !65
br i1 %4, label %Then, label %Else, !dbg !65
Then: ; preds = %Entry
call fastcc void @bar1(%Bar* sret %3), !dbg !66
br label %EndIf, !dbg !64
Else: ; preds = %Entry
call fastcc void @bar2(%Bar* sret %3), !dbg !67
br label %EndIf, !dbg !64
EndIf: ; preds = %Else, %Then
ret void, !dbg !68
}
define internal fastcc void @bar1(%Bar* nonnull sret) unnamed_addr #2 !dbg !69 {
Entry:
%1 = bitcast %Bar* %0 to i8*, !dbg !73
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %1, i8* align 4 bitcast (%Bar* @1 to i8*), i64 4, i1 false), !dbg !73
ret void, !dbg !73
}
define internal fastcc void @bar2(%Bar* nonnull sret) unnamed_addr #2 !dbg !75 {
Entry:
%1 = bitcast %Bar* %0 to i8*, !dbg !76
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %1, i8* align 4 bitcast (%Bar* @2 to i8*), i64 4, i1 false), !dbg !76
ret void, !dbg !76
}
!39 = !DILocalVariable(name: "static", scope: !40, file: !5, line: 2, type: !41)
!49 = !DILocalVariable(name: "runtime", scope: !40, file: !5, line: 6, type: !41)
```
Zig is an open-source programming language designed for robustness, optimality, and maintainability.
Resources
Building from Source
Note that you can download a binary of master branch.
Stage 1: Build Zig from C++ Source Code
Dependencies
POSIX
- cmake >= 2.8.5
- gcc >= 5.0.0 or clang >= 3.6.0
- LLVM, Clang, LLD development libraries == 8.x, compiled with the same gcc or clang version above
- Use the system package manager, or build from source.
Windows
- cmake >= 2.8.5
- Microsoft Visual Studio 2017 (version 15.8)
- LLVM, Clang, LLD development libraries == 8.x, compiled with the same MSVC version above
- Use the pre-built binaries or build from source.
Instructions
POSIX
mkdir build
cd build
cmake ..
make install
MacOS
brew install cmake llvm@8
brew outdated llvm@8 || brew upgrade llvm@8
mkdir build
cd build
cmake .. -DCMAKE_PREFIX_PATH=/usr/local/Cellar/llvm/8.0.0
make install
Windows
See https://github.com/ziglang/zig/wiki/Building-Zig-on-Windows
Stage 2: Build Self-Hosted Zig from Zig Source Code
Note: Stage 2 compiler is not complete. Beta users of Zig should use the Stage 1 compiler for now.
Dependencies are the same as Stage 1, except now you can use stage 1 to compile Zig code.
bin/zig build --build-file ../build.zig --prefix $(pwd)/stage2 install
This produces ./stage2/bin/zig which can be used for testing and development.
Once it is feature complete, it will be used to build stage 3 - the final compiler
binary.
Stage 3: Rebuild Self-Hosted Zig Using the Self-Hosted Compiler
Note: Stage 2 compiler is not yet able to build Stage 3. Building Stage 3 is not yet supported.
Once the self-hosted compiler can build itself, this will be the actual compiler binary that we will install to the system. Until then, users should use stage 1.
Debug / Development Build
./stage2/bin/zig build --build-file ../build.zig --prefix $(pwd)/stage3 install
Release / Install Build
./stage2/bin/zig build --build-file ../build.zig install -Drelease-fast