Merge bytecodealliance:main into wenyongh:main #655
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… RSS (#1608) With hardware boundary checking enabled, the app heap memory comes from `os_mmap()`. Clearing the whole heap in the memory allocator causes process RSS to reach maximum app heap size immediately and wastes lots of memory, so we had better remove the unnecessary memory clean operations in the memory allocator.
Refactor LLVM JIT for some purposes: - To simplify the source code of JIT compilation - To simplify the JIT modes - To align with LLVM latest changes - To prepare for the Multi-tier JIT compilation, refer to #1302 The changes mainly include: - Remove the MCJIT mode, replace it with ORC JIT eager mode - Remove the LLVM legacy pass manager (only keep the LLVM new pass manager) - Change the lazy mode's LLVM module/function binding: change each function in an individual LLVM module into all functions in a single LLVM module - Upgraded ORC JIT to ORCv2 JIT to enable lazy compilation Refer to #1468
…1598) This fixes unused option warnings on -pie for macOS. (On macOS cmake produces "-fPIE -Xlinker -pie") Bump required cmake version to 3.14 for CheckPIESupported. References: https://cmake.org/cmake/help/latest/prop_tgt/POSITION_INDEPENDENT_CODE.html https://cmake.org/cmake/help/latest/module/CheckPIESupported.html#module:CheckPIESupported
Since `memory` is not NULL, memory_instantiate will return non-null value when failed.
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