Commit Graph

2 Commits

Author SHA1 Message Date
Justin Bogner 821d7471f9 InstrProf: Allow multiple functions with the same name
This updates the instrumentation based profiling format so that when
we have multiple functions with the same name (but different function
hashes) we keep all of them instead of rejecting the later ones.

There are a number of scenarios where this can come up where it's more
useful to keep multiple function profiles:

* Name collisions in unrelated libraries that are profiled together.
* Multiple "main" functions from multiple tools built against a common
  library.
* Combining profiles from different build configurations (ie, asserts
  and no-asserts)

The profile format now stores the number of counters between the hash
and the counts themselves, so that multiple sets of counts can be
stored. Since this is backwards incompatible, I've bumped the format
version and added some trivial logic to skip this when reading the old
format.

llvm-svn: 214585
2014-08-01 22:50:07 +00:00
Justin Bogner af3001e859 llvm-profdata: Use consistent file suffixes in tests
In some places we've been using different suffixes for the different
file formats involved in instrprof, but in others we've just
ambiguously used .profdata. Update the test files to indicate the
types of file more obviously.

No functional change.

llvm-svn: 214357
2014-07-30 23:02:01 +00:00