compiler-rt

Compiler runtime library with Blocks support

The compiler-rt project is a simple library that provides an implementation of the low-level target-specific hooks required by code generation and other runtime components. For example, when compiling for a 32-bit target, converting a double to a 64-bit unsigned integer is compiling into a runtime call to the "__fixunsdfdi" function. The compiler-rt library provides optimized implementations of this and other low-level routines.