There were two types that could result in a compiler stack overflow.
This is difficult to fix in LLVM 14, so I won't even bother. However,
this is trivial to fix with opaque pointers in LLVM 15. Therefore, this
fix is for LLVM 15 only.
Fixes: https://github.com/tinygo-org/tinygo/issues/3341
wasmtime by default will assume the subcommand is "run" vs one of its
others, but being explicit helps clarify the actual command invoked.
For example, we pass similar looking args to wasmtime and also wasi.
Signed-off-by: Adrian Cole <adrian@tetrate.io>
We don't support these yet so let's just put them in a central location.
Once these functions are supported we can think about how to structure
the code again.
This gets rid of the following messages:
ld.lld: warning: duplicate /export option: hypot
ld.lld: warning: duplicate /export option: nextafter
I've wanted to wait for the next release but that may take a long while,
so I've simply set the submodule to the commit that fixes this message.
ThinLTO results in a small code size reduction, which is nice
(especially on these very small chips). It also brings us one step
closer to using ThinLTO everywhere.
LLVM wasn't aware that runtime.stackChainStart must be kept live and
can't be optimized away. With this hack, it is forced to consider
stackChainStart live at the time of the stack scan.
This fixes the corruption in https://github.com/tinygo-org/tinygo/issues/3277
This reverts commit 0b3a7280fa and updates
the documentation a little bit to explain the purpose of -gc=none. (I'm
thinking about the attiny10 by the way where defaulting to -gc=none
makes sense).
I found that .data is not correctly initialized with firmware images
that use over 64kB of flash. The problem is that the data in .data
(which is stored in flash, and copied to RAM at reset) is beyond the
64kB limit and must therefore be loaded using the elpm instruction
instead of the lpm instruction.
I encountered this issue while getting testdata/math.go to work for AVR.
The following command mostly works with this patch, while it prints
garbage withtout it:
tinygo run -target=simavr -size=short -scheduler=none ./testdata/math.go
(This also requires a patch to picolibc to work, see
https://github.com/picolibc/picolibc/pull/371)
It still doesn't work entirely with this patch: some of the math
operations have an incorrect result. But at least it's an improvement as
it won't print garbage anymore.
- Use compiler-rt and picolibc instead of avr-libc.
- Use ld.lld instead of avr-ld (or avr-gcc).
This makes it much easier to get started with TinyGo on AVR because
installing these extra tools (gcc-avr, avr-libc) can be a hassle.
It also opens the door for future improvements such as ThinLTO.
There is a code size increase but I think it's worth it in the long run.
The code size increase can hopefully be reduced with improvements to the
LLVM AVR backend and to compiler-rt.
