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build-scripts/build_llvm.py: bump to llvm 18 (#4259)

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* build-scripts/build_llvm.py: bump to llvm 18

cf. https://github.com/bytecodealliance/wasm-micro-runtime/issues/4210

why not 20?
because, as of writing this, 19 is the latest released version for
the xtensa fork of llvm: https://github.com/espressif/llvm-project

why not 19?
because of a bug in the xtensa fork of llvm:
https://github.com/espressif/llvm-project/issues/112

while we can use different versions for different targets,
it's nicer to use the same version everywhere when possible.

* spec-test-script/runtest.py: --size-level=0 for x86-64

with the recent version of LLVM, wamrc --size-level=1 often
generates R_X86_64_32S relocations which fail on load with
the infamous error:

"relocation truncated to fit R_X86_64_32S failed"

it seems that these relocations are often for jump tables.

this commit workarounds it with --size-level=0.

an alternative is to disable jump tables. (although it seems that
jump tables are not the only source of these relocations.)

cf. https://github.com/bytecodealliance/wasm-micro-runtime/issues/3035

it might be better to do this in wamrc itself. however, currently
target info is not available there in case of native compilation.
related: https://github.com/bytecodealliance/wasm-micro-runtime/issues/3356

* wamr-compiler: size_level=0 for sgx mode

cf. https://github.com/bytecodealliance/wasm-micro-runtime/issues/3035
This commit is contained in:
YAMAMOTO Takashi 2025-05-09 18:14:02 +09:00 committed by GitHub
parent 1a72dcf34f
commit 908838a5b5
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3 changed files with 6 additions and 5 deletions
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6
build-scripts/build_llvm.py
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@ -294,17 +294,17 @@ def main():
"arc": {
"repo": "https://github.com/llvm/llvm-project.git",
"repo_ssh": "git@github.com:llvm/llvm-project.git",
"branch": "release/15.x",
"branch": "release/18.x",
},
"xtensa": {
"repo": "https://github.com/espressif/llvm-project.git",
"repo_ssh": "git@github.com:espressif/llvm-project.git",
"branch": "xtensa_release_17.0.1",
"branch": "xtensa_release_18.1.2",
},
"default": {
"repo": "https://github.com/llvm/llvm-project.git",
"repo_ssh": "git@github.com:llvm/llvm-project.git",
"branch": "release/15.x",
"branch": "release/18.x",
},
}

3
tests/wamr-test-suites/spec-test-script/runtest.py
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@ -46,7 +46,8 @@ temp_module_table = {}
aot_target_options_map = {
"i386": ["--target=i386"],
"x86_32": ["--target=i386"],
"x86_64": ["--target=x86_64", "--cpu=skylake"],
# cf. https://github.com/bytecodealliance/wasm-micro-runtime/issues/3035
"x86_64": ["--target=x86_64", "--cpu=skylake", "--size-level=0"],
"aarch64": ["--target=aarch64", "--target-abi=eabi", "--cpu=cortex-a53"],
"aarch64_vfp": ["--target=aarch64", "--target-abi=gnueabihf", "--cpu=cortex-a53"],
"armv7": ["--target=armv7", "--target-abi=eabi", "--cpu=cortex-a9", "--cpu-features=-neon"],

2
wamr-compiler/main.c
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@ -712,7 +712,7 @@ main(int argc, char *argv[])
}
if (sgx_mode) {
option.size_level = 1;
option.size_level = 0;
option.is_sgx_platform = true;
}