e6fa2ee706
```zig
export fn entry2(c: bool) i32 {
return if (c)
i32(0)
else if (c)
i32(1)
else
i32(2);
}
```
```llvm
define i32 @entry2(i1) #2 !dbg !35 {
Entry:
%c = alloca i1, align 1
store i1 %0, i1* %c, align 1
call void @llvm.dbg.declare(metadata i1* %c, metadata !41, metadata !DIExpression()), !dbg !42
%1 = load i1, i1* %c, align 1, !dbg !43
br i1 %1, label %Then, label %Else, !dbg !43
Then: ; preds = %Entry
br label %EndIf3, !dbg !45
Else: ; preds = %Entry
%2 = load i1, i1* %c, align 1, !dbg !46
br i1 %2, label %Then1, label %Else2, !dbg !46
Then1: ; preds = %Else
br label %EndIf, !dbg !47
Else2: ; preds = %Else
br label %EndIf, !dbg !47
EndIf: ; preds = %Else2, %Then1
%3 = phi i32 [ 1, %Then1 ], [ 2, %Else2 ], !dbg !47
br label %EndIf3, !dbg !45
EndIf3: ; preds = %EndIf, %Then
%4 = phi i32 [ 0, %Then ], [ %3, %EndIf ], !dbg !45
ret i32 %4, !dbg !48
}
```
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brew outdated llvm@8 || brew upgrade llvm@8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_1
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