WebAssembly / WebAssembly/binaryen
`pass` test failures on 32-bit systems
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- WebAssembly
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Description
When running
cmake -G Ninja -DCMAKE_CXX_FLAGS="-m32" -DCMAKE_C_FLAGS="-m32" -DCMAKE_BUILD_TYPE=Debug .
ninja
python3 check.py lit
I get test failures in passes/O_fast-math.wast and passes/optimize-instructions-mvp.wast. Both tests give the wrong NaN:
$ "filecheck" "/usr/local/google/home/stevenfont/code/binaryen/test/lit/passes/O_fast-math.wast"
# command output:
/usr/local/google/home/stevenfont/code/binaryen/test/lit/passes/O_fast-math.wast:41:17: error: CHECK-NEXT: expected string not found in input
;; CHECK-NEXT: (f32.const -nan:0x23017a)
^
<stdin>:19:1: note: scanning from here
(f32.const -nan:0x63017a)
^
error: command failed with exit status: 1
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
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- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Reproduce the failure with the provided CMake, Ninja, and check.py commands, then inspect passes/O_fast-math.wast and passes/optimize-instructions-mvp.wast, focusing on their NaN CHECK lines. Done means both pass tests produce the expected NaN values on a 32-bit build.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cmake, python, wasm
- Domain
- compilers, testing-qa
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100