llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-17 21:35:07 +00:00

History

Justin Bogner 1476756523 InstrProf: Don't keep a large sparse list around just to zero it

The Terms vector here represented a polynomial of of all possible
counters, and is used to simplify expressions when generating coverage
mapping. There are a few problems with this:

1. Keeping the vector as a member is wasteful, since we clear it every
   time we use it.
2. Most expressions refer to a subset of the counters, so we end up
   iterating over a large number of zeros doing nothing a lot of the
   time.

This updates the user of the vector to store the terms locally, and
uses a sort and combine approach so that we only operate on counters
that are actually used in a given expression. For small cases this
makes very little difference, but in cases with a very large number of
counted regions this is a significant performance fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218879 91177308-0d34-0410-b5e6-96231b3b80d8

2014-10-02 16:04:03 +00:00

CMakeLists.txt

Re-factor sample profile reader into lib/ProfileData.

2014-09-09 12:40:50 +00:00

CoverageMapping.cpp

InstrProf: Don't keep a large sparse list around just to zero it

2014-10-02 16:04:03 +00:00

CoverageMappingReader.cpp

llvm-cov: Move some reader debug output out of the tool.

2014-09-20 15:31:51 +00:00

CoverageMappingWriter.cpp

InstrProf: Simplify counting a file's regions when writing coverage (NFC)