LDC LLVM profiling instrumentation

This page functions as a place to collect information and to document how the implementation in LDC is done.

LLVM InstrProf

[describe what and how LLVM supports profile instrumentation]

LLVM intrinsics

This was introduced with LLVM commit r223672

LLVM features two intrinsics for instrumentation:

• |llvm.instrprof_increment
• |llvm.instrprof_value_profile

Example of Clang's LLVM IR output

[show minimal C code example and Clang's -emit-llvm output for it]