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[CMake][LIT] Add option to run lit testsuites in parallel #82899

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Merged
merged 1 commit into from
Feb 28, 2024
Merged

[CMake][LIT] Add option to run lit testsuites in parallel #82899

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2 changes: 2 additions & 0 deletions llvm/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -718,6 +718,8 @@ if(LLVM_INDIVIDUAL_TEST_COVERAGE)
endif()
set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")

option(LLVM_PARALLEL_LIT "Enable multiple lit suites to run in parallel" OFF)

# On Win32 hosts, provide an option to specify the path to the GnuWin32 tools.
if( WIN32 AND NOT CYGWIN )
set(LLVM_LIT_TOOLS_DIR "" CACHE PATH "Path to GnuWin32 tools")
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17 changes: 12 additions & 5 deletions llvm/cmake/modules/AddLLVM.cmake
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Expand Up @@ -1947,11 +1947,18 @@ function(add_lit_target target comment)
list(APPEND LIT_COMMAND --param ${param})
endforeach()
if (ARG_UNPARSED_ARGUMENTS)
add_custom_target(${target}
COMMAND ${LIT_COMMAND} ${ARG_UNPARSED_ARGUMENTS}
COMMENT "${comment}"
USES_TERMINAL
)
if (LLVM_PARALLEL_LIT)
add_custom_target(${target}
COMMAND ${LIT_COMMAND} ${ARG_UNPARSED_ARGUMENTS}
COMMENT "${comment}"
)
else()
add_custom_target(${target}
COMMAND ${LIT_COMMAND} ${ARG_UNPARSED_ARGUMENTS}
COMMENT "${comment}"
USES_TERMINAL
)
endif()
else()
add_custom_target(${target}
COMMAND ${CMAKE_COMMAND} -E echo "${target} does nothing, no tools built.")
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6 changes: 6 additions & 0 deletions llvm/docs/CMake.rst
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Expand Up @@ -762,6 +762,12 @@ enabled sub-projects. Nearly all of these variable names begin with
**LLVM_PARALLEL_LINK_JOBS**:STRING
Define the maximum number of concurrent link jobs.

**LLVM_PARALLEL_LIT**:BOOL
Defaults to ``OFF``. If set to ``OFF``, lit testsuites will be configured
with CMake's ``USES_TERMINAL`` flag to give direct access to the terminal. If
set to ``ON``, that flag will be removed allowing Ninja to schedule multiple
lit testsuites in parallel.

**LLVM_RAM_PER_COMPILE_JOB**:STRING
Calculates the amount of Ninja compile jobs according to available resources.
Value has to be in MB, overwrites LLVM_PARALLEL_COMPILE_JOBS. Compile jobs
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