Motiejus Jakštys
811672be4b
Port two missing checks from upstream AstGen.zig rvalueInner to the C rvalue function: 1. isAlwaysVoid (Zir.zig:1343-1608): When the result refers to an instruction that always produces void (e.g., dbg_stmt, store_node, export, memcpy, etc.), replace the result with void_value before proceeding. This prevents emitting unnecessary type coercions or stores on always-void instructions. 2. endsWithNoReturn (AstGen.zig:11068): When the current GenZir block ends with a noreturn instruction, return the result immediately without emitting any rvalue instructions. This avoids emitting dead ZIR instructions after noreturn. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
About
zig0 aspires to be an interpreter of zig 0.15.1 written in C.
This is written with help from LLM:
- Lexer:
- Datastructures 100% human.
- Helper functions 100% human.
- Lexing functions 50/50 human/bot.
- Parser:
- Datastructures 100% human.
- Helper functions 50/50.
- Parser functions 5/95 human/bot.
- AstGen: TBD.
Testing
Quick test:
zig build fmt test
Full test and static analysis with all supported compilers and valgrind (run before commit, takes a while):
zig build -Dvalgrind
Debugging tips
Test runs infinitely? Build the test program executable:
$ zig build test -Dno-exec
And then run it, capturing the stack trace:
gdb -batch \
-ex "python import threading; threading.Timer(1.0, lambda: gdb.post_event(lambda: gdb.execute('interrupt'))).start()" \
-ex run \
-ex "bt full" \
-ex quit \
zig-out/bin/test
You are welcome to replace -ex "bt full" with anything other of interest.