maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/bolt/runtime/CMakeLists.txt

15 lines
369 B
CMake
Raw Normal View History

[BOLT] Support instrumentation via runtime library Summary: To allow the development of future instrumentation work, this patch adds support in BOLT for linking arbitrary libraries into the binary processed by BOLT. We use orc relocation handling mechanism for that. With this support, this patch also moves code programatically generated in X86 assembly language by X86MCPlusBuilder to C code written in a new library called bolt_rt. Change CMake to support this library as an external project in the same way as clang does with compiler_rt. This library is installed in the lib/ folder relative to BOLT root installation and by default instrumentation will look for the library at that location to finish processing the binary with instrumentation. (cherry picked from FBD16572013)
2019-07-25 05:03:43 +08:00
cmake_minimum_required(VERSION 3.1.0)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
project(libbolt_rt_project)
add_library(bolt_rt STATIC
instr.cpp
)
[BOLT] Efficient edge profiling in instrumented mode Summary: Change our edge profiling technique when using instrumentation to do not instrument every edge. Instead, build the spanning tree for the CFG and omit instrumentation for edges in the spanning tree. Infer the edge count for these edges when writing the profile during run time. The inference works with a bottom-up traversal of the spanning tree and establishes the value of the edge connecting to the parent based on a simple flow equation involving output and input edges, where the only unknown variable is the parent edge. This requires some engineering in the runtime lib to support dynamic allocation for building these graphs at runtime. (cherry picked from FBD17062773)
2019-08-08 07:09:50 +08:00
# Don't let the compiler think it can create calls to standard libs
target_compile_options(bolt_rt PRIVATE -ffreestanding)
[BOLT] Support instrumentation via runtime library Summary: To allow the development of future instrumentation work, this patch adds support in BOLT for linking arbitrary libraries into the binary processed by BOLT. We use orc relocation handling mechanism for that. With this support, this patch also moves code programatically generated in X86 assembly language by X86MCPlusBuilder to C code written in a new library called bolt_rt. Change CMake to support this library as an external project in the same way as clang does with compiler_rt. This library is installed in the lib/ folder relative to BOLT root installation and by default instrumentation will look for the library at that location to finish processing the binary with instrumentation. (cherry picked from FBD16572013)
2019-07-25 05:03:43 +08:00
install(TARGETS bolt_rt DESTINATION lib)