Alex Lorenz ee02499a8f Add coverage mapping generation. ...

This patch adds the '-fcoverage-mapping' option which
allows clang to generate the coverage mapping information
that can be used to provide code coverage analysis using
the execution counts obtained from the instrumentation 
based profiling (-fprofile-instr-generate).

llvm-svn: 214752

2014-08-04 18:41:51 +00:00

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