[js] export default vis

build_tools/build_llvm_wasi.sh

@@ -31,16 +31,17 @@ echo "*********************** BUILDING LLVM *********************************"
 # hack to emit html wrappers
 # https://stackoverflow.com/a/75596433/9045206
 sed -i.bak 's/CMAKE_EXECUTABLE_SUFFIX ".js"/CMAKE_EXECUTABLE_SUFFIX ".html"/g' "$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake"
-sed -i.bak 's/if(LLVM_ENABLE_PIC)/if(LLVM_ENABLE_PIC)\nreturn()\nendif()\nif(LLVM_ENABLE_PIC)/g' "${LLVM_SOURCE_DIR}/mlir/lib/ExecutionEngine/CMakeLists.txt"
 
+# all emscripten settings here https://github.com/emscripten-core/emscripten/blob/main/src/settings.js
+# wasm-ld exports https://lld.llvm.org/WebAssembly.html#exports
+# -sLINKABLE=1 combined with CMAKE_CXX_VISIBILITY_PRESET=default will cause all symbols to be exported
+# -sEXPORT_ALL=1 put all of the exported function in the wasm on the JS module
 cmake_options=(
   -GNinja
   -S "${LLVM_SOURCE_DIR}/llvm"
   -B "${LLVM_BUILD_DIR}"
-  -DCMAKE_C_FLAGS="-Os"
-  -DCMAKE_CXX_FLAGS="-Os"
   -DCMAKE_BUILD_TYPE=Release
-  -DCMAKE_EXE_LINKER_FLAGS="--emit-symbol-map -sSTANDALONE_WASM=1 -sWASM=1 -sWASM_BIGINT=1 -sEXPORT_ALL=1 -sEXPORTED_RUNTIME_METHODS=cwrap,ccall,getValue,setValue,writeAsciiToMemory,wasmTable --minify 0 -lembind"
+  -DCMAKE_EXE_LINKER_FLAGS="--emit-symbol-map -sSTANDALONE_WASM=1 -sWASM=1 -sWASM_BIGINT=1 -sLINKABLE=1 -sEXPORT_ALL=1 -sEXPORTED_RUNTIME_METHODS=cwrap,ccall,getValue,setValue,writeAsciiToMemory,wasmTable --minify 0 -lembind"
   -DCMAKE_INSTALL_PREFIX="${LLVM_INSTALL_DIR}"
   -DCMAKE_SYSTEM_NAME=Emscripten
   -DCMAKE_TOOLCHAIN_FILE="$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake"
@@ -58,10 +59,12 @@ cmake --build "${LLVM_BUILD_DIR}" \
   --target install-mlirdevelopment-distribution
 
 sed -i.bak 's/CMAKE_EXECUTABLE_SUFFIX ".html"/CMAKE_EXECUTABLE_SUFFIX ".js"/g' "$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake"
-# https://stackoverflow.com/a/1252191/9045206
-sed -i.bak -e ':a' -e 'N' -e '$!ba' -e 's/if(LLVM_ENABLE_PIC)\nreturn()\nendif()\n//g' "${LLVM_SOURCE_DIR}/mlir/lib/ExecutionEngine/CMakeLists.txt"
-
 
 # wasi files aren't installed for some reason
-cp "${LLVM_BUILD_DIR}"/bin/* "${LLVM_INSTALL_DIR}/bin"
-cp "${LLVM_BUILD_DIR}"/lib/*.symbols "${LLVM_INSTALL_DIR}/lib"
+cp "${LLVM_BUILD_DIR}"/bin/mlir-opt.* "${LLVM_INSTALL_DIR}/bin"
+# cp "${LLVM_BUILD_DIR}"/lib/*.symbols "${LLVM_INSTALL_DIR}/lib"
+
+# prevent symbol collisions
+# sed -i.bak 's/if(LLVM_ENABLE_PIC)/if(LLVM_ENABLE_PIC)\nreturn()\nendif()\nif(LLVM_ENABLE_PIC)/g' "${LLVM_SOURCE_DIR}/mlir/lib/ExecutionEngine/CMakeLists.txt"
+# https://stackoverflow.com/a/1252191/9045206
+# sed -i.bak -e ':a' -e 'N' -e '$!ba' -e 's/if(LLVM_ENABLE_PIC)\nreturn()\nendif()\n//g' "${LLVM_SOURCE_DIR}/mlir/lib/ExecutionEngine/CMakeLists.txt"

build_tools/cmake/llvm_wasm_cache.cmake

@@ -14,11 +14,11 @@ set(LLVM_ENABLE_LIBPFM OFF CACHE BOOL "")
 set(LLVM_ENABLE_LIBXML2 OFF CACHE BOOL "")
 set(LLVM_ENABLE_OCAMLDOC OFF CACHE BOOL "")
 
-set(LLVM_BUILD_LLVM_DYLIB ON CACHE BOOL "")
-set(MLIR_BUILD_MLIR_C_DYLIB ON CACHE BOOL "")
+set(LLVM_BUILD_LLVM_DYLIB OFF CACHE BOOL "")
+set(MLIR_BUILD_MLIR_C_DYLIB OFF CACHE BOOL "")
 # when building libLLVM
 # relocation R_WASM_MEMORY_ADDR_SLEB cannot be used against symbol
-set(LLVM_ENABLE_PIC ON CACHE BOOL "")
+set(LLVM_ENABLE_PIC OFF CACHE BOOL "")
 set(MLIR_ENABLE_SPIRV_CPU_RUNNER OFF)
 set(MLIR_ENABLE_EXECUTION_ENGINE OFF)
 
@@ -41,7 +41,7 @@ set(LLVM_MlirDevelopment_DISTRIBUTION_COMPONENTS
   llvm-headers
   llvm-libraries
   cmake-exports
-  opt
+  # opt
   # triggers LLVMMlirDevelopmentExports.cmake
   mlirdevelopment-cmake-exports
   # triggers MLIRMlirDevelopmentTargets.cmake
@@ -51,7 +51,7 @@ set(LLVM_MlirDevelopment_DISTRIBUTION_COMPONENTS
   mlir-headers
   mlir-libraries
   mlir-opt
-  mlir-reduce
-  mlir-tblgen
-  mlir-translate
+  # mlir-reduce
+  # mlir-tblgen
+  # mlir-translate
   CACHE STRING "")

build_tools/cmake/llvm_wasm_project_include.cmake

@@ -1,17 +1,27 @@
 # everything in here gets run at the end of the project loading
 # https://github.com/emscripten-core/emscripten/issues/15276#issuecomment-1039349267
 set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS TRUE)
-# so that the correct LLVM_ABI macros get set
+# __ELF__ so that the correct LLVM_ABI macros get set
+# https://github.com/WebAssembly/tool-conventions/blob/main/BasicCABI.md#function-arguments-and-return-values
+# Similarly, types can either be returned directly from WebAssembly functions or returned indirectly via a pointer parameter prepended to the parameter list.
+# https://github.com/llvm/llvm-project/blob/6d973b4548e281d0b8e75e85833804bb45b6a0e8/clang/lib/CodeGen/Targets/WebAssembly.cpp#L135
+# https://github.com/llvm/llvm-project/commit/c285307e1457c4db2346443a4336e672d7487111#diff-b83bb889340990fea25762060e144b5cd4b4652a6fa737aaea9555d456344219
+# https://github.com/llvm/llvm-project/blame/63534779b4ef1816e2961246011e2ec3be110d27/clang/lib/CodeGen/TargetInfo.cpp
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__ELF__")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D__ELF__")
-set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-sSIDE_MODULE=1 -sEXPORT_ALL=1 --emit-symbol-map")
-set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "-sSIDE_MODULE=1 -sEXPORT_ALL=1 --emit-symbol-map")
+set(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-sLINKABLE=1 -sEXPORT_ALL=1")
+set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "-sLINKABLE=1 -sEXPORT_ALL=1")
 # prevent duplicated libs from being linked
 # will need to be renamed to DEDUPLICATION when CMake version catches up
 # https://github.com/Kitware/CMake/commit/5617c34c3135f7ec203d5a48b803eb323f458bc3#diff-17fc647759070cdaddd99e9ad994c4478860d9c301ed9a9a9f061a8825c8b690L20
 set(CMAKE_C_LINK_LIBRARIES_PROCESSING ORDER=FORWARD UNICITY=ALL)
 set(CMAKE_CXX_LINK_LIBRARIES_PROCESSING ORDER=FORWARD UNICITY=ALL)
-# hack to prevent -Bsymbolic
-set(LLVM_LINKER_IS_SOLARISLD_ILLUMOS ON)
+
+## hack to prevent -Bsymbolic
+#set(LLVM_LINKER_IS_SOLARISLD_ILLUMOS ON)
+
 set(CMAKE_SHARED_LIBRARY_SUFFIX ".wasm")
-set(CMAKE_STRIP FALSE)
+set(CMAKE_STRIP FALSE)
+set(LLVM_NO_DEAD_STRIP ON)
+set(CMAKE_VERBOSE_MAKEFILE ON)
+set(CMAKE_CXX_VISIBILITY_PRESET default)