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Diffstat (limited to 'examples/Kaleidoscope/Orc/fully_lazy/README.txt')
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diff --git a/examples/Kaleidoscope/Orc/fully_lazy/README.txt b/examples/Kaleidoscope/Orc/fully_lazy/README.txt new file mode 100644 index 0000000..c018931 --- /dev/null +++ b/examples/Kaleidoscope/Orc/fully_lazy/README.txt @@ -0,0 +1,21 @@ +//===----------------------------------------------------------------------===/ +// Kaleidoscope with Orc - Lazy IRGen Version +//===----------------------------------------------------------------------===// + +This version of Kaleidoscope with Orc demonstrates fully lazy IR-generation. +Building on the lazy-irgen version of the tutorial, this version injects JIT +callbacks to defer the bulk of IR-generation and code-generation of functions until +they are first called. + +When a function definition is entered, a JIT callback is created and a stub +function is built that will call the body of the function indirectly. The body of +the function is *not* IRGen'd at this point. Instead, the function pointer for +the indirect call is initialized to point at the JIT callback, and the compile +action for the callback is initialized with a lambda that IRGens the body of the +function and adds it to the JIT. The function pointer is updated by the JIT +callback's update action to point at the newly emitted function body, so future +calls to the stub will go straight to the body, not through the JIT. + +This directory contains a Makefile that allows the code to be built in a +standalone manner, independent of the larger LLVM build infrastructure. To build +the program you will need to have 'clang++' and 'llvm-config' in your path. |