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A few changes related to WAMRC_LLC_COMPILER (#2218)

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Print `target triple` for wamrc and set target triple for the LLVM module.
And update document.
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YAMAMOTO Takashi 2023-05-17 10:56:35 +09:00 committed by GitHub
parent f69ff70587
commit f759a1f960
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2 changed files with 6 additions and 1 deletions
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3
core/iwasm/compilation/aot_llvm.c
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@ -2007,6 +2007,7 @@ aot_create_comp_context(AOTCompData *comp_data, aot_comp_option_t option)
os_printf("Create AoT compiler with:\n");
os_printf(" target: %s\n", comp_ctx->target_arch);
os_printf(" target cpu: %s\n", cpu);
os_printf(" target triple: %s\n", triple_norm);
os_printf(" cpu features: %s\n", features);
os_printf(" opt level: %d\n", opt_level);
os_printf(" size level: %d\n", size_level);
@ -2025,6 +2026,8 @@ aot_create_comp_context(AOTCompData *comp_data, aot_comp_option_t option)
break;
}
LLVMSetTarget(comp_ctx->module, triple_norm);
if (!LLVMTargetHasTargetMachine(target)) {
snprintf(buf, sizeof(buf),
"no target machine for this target (%s).", triple_norm);

4
doc/build_wasm_app.md
View File

@ -394,7 +394,7 @@ Examples: wamrc -o test.aot test.wasm
### Usage example
``` bash
WAMRC_LLC_COMPILER=<path/to/your/compiler/driver> ./wamrc -o test.aot test.wasm
WAMRC_LLC_COMPILER=/usr/local/opt/llvm@14/bin/clang WAMRC_LLC_FLAGS="--target=x86_64-pc-linux-gnu -mcmodel=medium -c -O3" ./wamrc -o test.aot test.wasm
```
> Note: `wamrc` will verify whether the specified file exists and executable. If verification failed, `wamrc` will report a warning and fallback to normal pipeline. Since the verification is based on file, you **must specify the absolute path to the binary** even if it's in `$PATH`
@ -403,6 +403,8 @@ WAMRC_LLC_COMPILER=<path/to/your/compiler/driver> ./wamrc -o test.aot test.wasm
> Note: the `LLC` and `ASM` in the env name just means this compiler will be used to compile the `LLVM IR file`/`assembly file` to object file, usually passing the compiler driver is the simplest way. (e.g. for LLVM toolchain, you don't need to pass `/usr/bin/llc`, using `/usr/bin/clang` is OK)
> Note: You might need to set `WAMRC_LLC_FLAGS`/`WAMRC_ASM_FLAGS` to match whatever the `wamrc` command would automatically do. In the above example, `-mcmodel=medium` corresponds to `wamrc --size-level=1`, which is the default of `wamrc` on macOS.
Run WASM app in WAMR mini product build
=======================================