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6 changes: 6 additions & 0 deletions CMakeLists.txt
Original file line number Diff line number Diff line change
Expand Up @@ -1289,6 +1289,12 @@ if(VLLM_GPU_LANG STREQUAL "HIP")
WITH_SOABI)
endif()

# Must run after the last HIP `define_extension_target` so every extension
# has registered its sources.
if (VLLM_GPU_LANG STREQUAL "HIP")
vllm_finalize_hipify_target()
endif()

# For CUDA and HIP builds also build the triton_kernels external package.
if(VLLM_GPU_LANG STREQUAL "CUDA" OR VLLM_GPU_LANG STREQUAL "HIP")
include(cmake/external_projects/triton_kernels.cmake)
Expand Down
53 changes: 40 additions & 13 deletions cmake/utils.cmake
Original file line number Diff line number Diff line change
Expand Up @@ -47,12 +47,17 @@ macro (append_cmake_prefix_path PKG EXPR)
list(APPEND CMAKE_PREFIX_PATH ${_PREFIX_PATH})
endmacro()

#
# Add a target named `hipify${NAME}` that runs the hipify preprocessor on a set
# of CUDA source files. The names of the corresponding "hipified" sources are
# stored in `OUT_SRCS`.
#
# Resolve hipified output paths for `NAME` into `OUT_SRCS` and register the
# `.cu` sources with the shared `hipify_all` target. Per-extension hipify
# targets are unsafe to run in parallel against a shared csrc/ output dir, so
# accumulation here is paired with a single finalize step.
function (hipify_sources_target OUT_SRCS NAME ORIG_SRCS)
if (TARGET hipify_all)
message(FATAL_ERROR
"hipify_sources_target(${NAME}) called after vllm_finalize_hipify_target. "
"Add the new HIP extension before the finalizer call in CMakeLists.txt.")
endif()

#
# Split into C++ and non-C++ (i.e. CUDA) sources.
#
Expand All @@ -73,19 +78,41 @@ function (hipify_sources_target OUT_SRCS NAME ORIG_SRCS)
list(APPEND HIP_SRCS "${CMAKE_CURRENT_BINARY_DIR}/${SRC}")
endforeach()

set(CSRC_BUILD_DIR ${CMAKE_CURRENT_BINARY_DIR}/csrc)
add_custom_target(
hipify${NAME}
COMMAND ${Python_EXECUTABLE} ${CMAKE_SOURCE_DIR}/cmake/hipify.py -p ${CMAKE_SOURCE_DIR}/csrc -o ${CSRC_BUILD_DIR} ${SRCS}
DEPENDS ${CMAKE_SOURCE_DIR}/cmake/hipify.py ${SRCS}
BYPRODUCTS ${HIP_SRCS}
COMMENT "Running hipify on ${NAME} extension source files.")
set_property(GLOBAL APPEND PROPERTY VLLM_HIPIFY_ALL_SRCS ${SRCS})
set_property(GLOBAL APPEND PROPERTY VLLM_HIPIFY_ALL_BYPRODUCTS ${HIP_SRCS})
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# Swap out original extension sources with hipified sources.
list(APPEND HIP_SRCS ${CXX_SRCS})
set(${OUT_SRCS} ${HIP_SRCS} PARENT_SCOPE)
endfunction()

# Define the single shared `hipify_all` custom target that runs hipify once
# on the union of every HIP extension's sources. Call after the last HIP
# `define_extension_target`.
function (vllm_finalize_hipify_target)
if (TARGET hipify_all)
return()
endif()

get_property(ALL_SRCS GLOBAL PROPERTY VLLM_HIPIFY_ALL_SRCS)
get_property(ALL_BYPRODUCTS GLOBAL PROPERTY VLLM_HIPIFY_ALL_BYPRODUCTS)

if (NOT ALL_SRCS)
return()
endif()

list(REMOVE_DUPLICATES ALL_SRCS)
list(REMOVE_DUPLICATES ALL_BYPRODUCTS)

set(CSRC_BUILD_DIR ${CMAKE_CURRENT_BINARY_DIR}/csrc)
add_custom_target(
hipify_all
COMMAND ${Python_EXECUTABLE} ${CMAKE_SOURCE_DIR}/cmake/hipify.py -p ${CMAKE_SOURCE_DIR}/csrc -o ${CSRC_BUILD_DIR} ${ALL_SRCS}
DEPENDS ${CMAKE_SOURCE_DIR}/cmake/hipify.py ${ALL_SRCS}
BYPRODUCTS ${ALL_BYPRODUCTS}
COMMENT "Running hipify on all extension source files.")
endfunction()

#
# Get additional GPU compiler flags from torch.
#
Expand Down Expand Up @@ -551,7 +578,7 @@ function (define_extension_target MOD_NAME)

if (ARG_LANGUAGE STREQUAL "HIP")
# Make this target dependent on the hipify preprocessor step.
add_dependencies(${MOD_NAME} hipify${MOD_NAME})
add_dependencies(${MOD_NAME} hipify_all)
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# Make sure we include the hipified versions of the headers, and avoid conflicts with the ones in the original source folder
target_include_directories(${MOD_NAME} PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/csrc
${ARG_INCLUDE_DIRECTORIES})
Expand Down
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