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llvm-project/clang/test/Profile
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Justin Bogner e9fe0a298c InstrProf: Make profile variables private to reduce binary size overhead 
When we instrument a program for profiling, we copy the linkage of an
instrumented function so that our datastructures merge in the same way
as the function. This avoids redundant copies for things like
linkonce, but ends up emitting names we never need to reference for
normal and internal symbols. Promoting internal and external linkage
to private for these variables reduces the size overhead of profiling
drastically.

llvm-svn: 232799
 		2015-03-20 06:34:38 +00:00
..
Inputs InstrProf: Update for LLVM API change 2014-08-01 22:50:16 +00:00
README PGO: Clarify the testing README 2014-03-11 18:18:12 +00:00
c-attributes.c test: Use llvm-profdata merge in Profile tests 2014-04-17 22:49:06 +00:00
c-captured.c InstrProf: Make profile variables private to reduce binary size overhead 2015-03-20 06:34:38 +00:00
c-counter-overflows.c IR: Make metadata typeless in assembly, clang side 2014-12-15 19:10:08 +00:00
c-general.c InstrProf: Make profile variables private to reduce binary size overhead 2015-03-20 06:34:38 +00:00
c-linkage-available_externally.c Test case updates for explicit type parameter to the gep operator 2015-03-13 18:21:46 +00:00
c-linkage.c InstrProf: Make profile variables private to reduce binary size overhead 2015-03-20 06:34:38 +00:00
c-outdated-data.c test: Use llvm-profdata merge in Profile tests 2014-04-17 22:49:06 +00:00
c-unprofiled-blocks.c test: Use llvm-profdata merge in Profile tests 2014-04-17 22:49:06 +00:00
c-unprofiled.c CodeGen: Improve warnings about uninstrumented files when profiling 2014-06-26 01:45:07 +00:00
c-unreachable-after-switch.c InstrProf: Make profile variables private to reduce binary size overhead 2015-03-20 06:34:38 +00:00
cxx-class.cpp IR: Make metadata typeless in assembly, clang side 2014-12-15 19:10:08 +00:00
cxx-implicit.cpp CodeGen: Avoid instrumenting implicit Decls more effectively 2014-04-25 07:20:05 +00:00
cxx-lambda.cpp InstrProf: Make profile variables private to reduce binary size overhead 2015-03-20 06:34:38 +00:00
cxx-linkage.cpp InstrProf: Make profile variables private to reduce binary size overhead 2015-03-20 06:34:38 +00:00
cxx-templates.cpp IR: Make metadata typeless in assembly, clang side 2014-12-15 19:10:08 +00:00
cxx-throws.cpp InstrProf: Make profile variables private to reduce binary size overhead 2015-03-20 06:34:38 +00:00
objc-general.m InstrProf: Make profile variables private to reduce binary size overhead 2015-03-20 06:34:38 +00:00

README 

These are tests for instrumentation based profiling.  This specifically means
the -fprofile-instr-generate and -fprofile-instr-use driver flags.

Tests in this directory should usually test both:

  - the generation of instrumentation (-fprofile-instr-generate), and
  - the use of profile data from instrumented runs (-fprofile-instr-use).

In order to test -fprofile-instr-use without actually running an instrumented
program, .profdata files are checked into Inputs/.

The input source files must include a main function such that building with
-fprofile-instr-generate and running the resulting program generates the same
.profdata file that is consumed by the tests for -fprofile-instr-use.  Even
tests that only check -fprofile-instr-use should include such a main function,
so that profile data can be regenerated as the .profdata file format evolves.