tree c06b7cd66601786a3d30909e72daef28259cbb38
parent ceb465a8a4ce2101bd7dd50db99cbc6b82757bd6
author Nick Lewycky <nicholas@mxc.ca> 1302570369 +0000
committer Nick Lewycky <nicholas@mxc.ca> 1302570369 +0000

Add support for line profiling. Very work-in-progress.

Use debug info in the IR to find the directory/file:line:col. Each time that location changes, bump a counter.

Unlike the existing profiling system, we don't try to look at argv[], and thusly don't require main() to be present in the IR. This matches GCC's technique where you specify the profiling flag when producing each .o file.

The runtime library is minimal, currently just calling printf at program shutdown time. The API is designed to make it possible to emit GCOV data later on.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129340 91177308-0d34-0410-b5e6-96231b3b80d8