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Implement the segue optimization for LLVM AOT/JIT (#2230)

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Segue is an optimization technology which uses x86 segment register to store
the WebAssembly linear memory base address, so as to remove most of the cost
of SFI (Software-based Fault Isolation) base addition and free up a general
purpose register, by this way it may:
- Improve the performance of JIT/AOT
- Reduce the footprint of JIT/AOT, the JIT/AOT code generated is smaller
- Reduce the compilation time of JIT/AOT

This PR uses the x86-64 GS segment register to apply the optimization, currently
it supports linux and linux-sgx platforms on x86-64 target. By default it is disabled,
developer can use the option below to enable it for wamrc and iwasm(with LLVM
JIT enabled):
```bash
wamrc --enable-segue=[<flags>] -o output_file wasm_file
iwasm --enable-segue=[<flags>] wasm_file [args...]
```
`flags` can be:
    i32.load, i64.load, f32.load, f64.load, v128.load,
    i32.store, i64.store, f32.store, f64.store, v128.store
Use comma to separate them, e.g. `--enable-segue=i32.load,i64.store`,
and `--enable-segue` means all flags are added.

Acknowledgement:
Many thanks to Intel Labs, UC San Diego and UT Austin teams for introducing this
technology and the great support and guidance!

Signed-off-by: Wenyong Huang <wenyong.huang@intel.com>
Co-authored-by: Vahldiek-oberwagner, Anjo Lucas <anjo.lucas.vahldiek-oberwagner@intel.com>
This commit is contained in:
Wenyong Huang
2023-05-26 10:13:33 +08:00
committed by GitHub
parent 27239723a9
commit 76be848ec3
42 changed files with 1864 additions and 123 deletions
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8
core/iwasm/compilation/aot_compiler.h
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@ -239,6 +239,13 @@ check_type_compatible(uint8 src_type, uint8 dst_type)
#define FUNC_REF_TYPE comp_ctx->basic_types.funcref_type
#define EXTERN_REF_TYPE comp_ctx->basic_types.externref_type
#define INT8_PTR_TYPE_GS comp_ctx->basic_types.int8_ptr_type_gs
#define INT16_PTR_TYPE_GS comp_ctx->basic_types.int16_ptr_type_gs
#define INT32_PTR_TYPE_GS comp_ctx->basic_types.int32_ptr_type_gs
#define INT64_PTR_TYPE_GS comp_ctx->basic_types.int64_ptr_type_gs
#define F32_PTR_TYPE_GS comp_ctx->basic_types.float32_ptr_type_gs
#define F64_PTR_TYPE_GS comp_ctx->basic_types.float64_ptr_type_gs
#define I32_CONST(v) LLVMConstInt(I32_TYPE, v, true)
#define I64_CONST(v) LLVMConstInt(I64_TYPE, v, true)
#define F32_CONST(v) LLVMConstReal(F32_TYPE, v)
@ -272,6 +279,7 @@ check_type_compatible(uint8 src_type, uint8 dst_type)
#define V128_TYPE comp_ctx->basic_types.v128_type
#define V128_PTR_TYPE comp_ctx->basic_types.v128_ptr_type
#define V128_PTR_TYPE_GS comp_ctx->basic_types.v128_ptr_type_gs
#define V128_i8x16_TYPE comp_ctx->basic_types.i8x16_vec_type
#define V128_i16x8_TYPE comp_ctx->basic_types.i16x8_vec_type
#define V128_i32x4_TYPE comp_ctx->basic_types.i32x4_vec_type