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Fangrui Song 2053b5c8eb [gcov] Add spanning tree optimization

gcov is an "Edge Profiling with Edge Counters" application according to
Optimally Profiling and Tracing Programs (1994).

The minimum number of counters necessary is |E|-(|V|-1). The unmeasured edges
form a spanning tree. Both GCC --coverage and clang -fprofile-generate leverage
this optimization. This patch implements the optimization for clang --coverage.
The produced .gcda files are much smaller now.

2020-09-13 00:07:31 -07:00

atomic-counter.ll

[gcov] Add spanning tree optimization

2020-09-13 00:07:31 -07:00

exit-block.ll

[gcov] Delete XFAIL: host-byteorder-big-endian for test/Transforms/GCOVProfiling/{exit-block.ll,function-numbering.ll}

2020-06-06 11:59:31 -07:00

function-numbering.ll

[gcov] Delete XFAIL: host-byteorder-big-endian for test/Transforms/GCOVProfiling/{exit-block.ll,function-numbering.ll}

2020-06-06 11:59:31 -07:00

global-ctor.ll

[gcov][test] Add mkdir -p %t && cd %t