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Enable LLVM link time optimization (LTO) for AOT (#831)

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Enable LLVM link time optimization for AOT and enable it by default,
and provide "wamrc --disable-llvm-lto" option to disable it.
And modify the spec test script, disable it by default when testing
spec cases.

Signed-off-by: Wenyong Huang <wenyong.huang@intel.com>
This commit is contained in:
Wenyong Huang
2021-11-13 16:59:35 +08:00
committed by GitHub
parent 9281286181
commit a1ad950ae1
8 changed files with 72 additions and 2 deletions
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31
core/iwasm/compilation/aot_compiler.c
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@ -2548,6 +2548,7 @@ aot_compile_wasm(AOTCompContext *comp_ctx)
bh_print_time("Begin to run function optimization passes");
/* Run function pass manager */
if (comp_ctx->optimize) {
LLVMInitializeFunctionPassManager(comp_ctx->pass_mgr);
for (i = 0; i < comp_ctx->func_ctx_count; i++)
@ -2555,6 +2556,36 @@ aot_compile_wasm(AOTCompContext *comp_ctx)
comp_ctx->func_ctxes[i]->func);
}
/* Run common pass manager */
if (comp_ctx->optimize && !comp_ctx->is_jit_mode
&& !comp_ctx->disable_llvm_lto) {
LLVMPassManagerRef common_pass_mgr = NULL;
LLVMPassManagerBuilderRef pass_mgr_builder = NULL;
if (!(common_pass_mgr = LLVMCreatePassManager())) {
aot_set_last_error("create pass manager failed");
return false;
}
if (!(pass_mgr_builder = LLVMPassManagerBuilderCreate())) {
aot_set_last_error("create pass manager builder failed");
LLVMDisposePassManager(common_pass_mgr);
return false;
}
LLVMPassManagerBuilderSetOptLevel(pass_mgr_builder,
comp_ctx->opt_level);
LLVMPassManagerBuilderPopulateModulePassManager(pass_mgr_builder,
common_pass_mgr);
LLVMPassManagerBuilderPopulateLTOPassManager(
pass_mgr_builder, common_pass_mgr, true, true);
LLVMRunPassManager(common_pass_mgr, comp_ctx->module);
LLVMDisposePassManager(common_pass_mgr);
LLVMPassManagerBuilderDispose(pass_mgr_builder);
}
return true;
}