When writing a coverage mapping we iterate through the mapping regions
in order of FileID, but we were then repeatedly searching from the
beginning of the list to count the number of regions with a given
FileID.
It is simpler and more efficient to search forward from the current
iterator to find the number of regions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218842 91177308-0d34-0410-b5e6-96231b3b80d8
This patch removes the empty coverage mapping regions.
Those regions were produced by clang's old mapping region generation
algorithm, but the new algorithm doesn't generate them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213981 91177308-0d34-0410-b5e6-96231b3b80d8
This patch implements the data structures, the reader and
the writers for the new code coverage mapping system.
The new code coverage mapping system uses the instrumentation
based profiling to provide code coverage analysis.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213910 91177308-0d34-0410-b5e6-96231b3b80d8
