Ellis Hoag 11d3074267 [InstrProf] Add single byte coverage mode ... Use the llvm flag `-pgo-function-entry-coverage` to create single byte "counters" to track functions coverage. This mode has significantly less size overhead in both code and data because * We mark a function as "covered" with a store instead of an increment which generally requires fewer assembly instructions * We use a single byte per function rather than 8 bytes per block The trade off of course is that this mode only tells you if a function has been covered. This is useful, for example, to detect dead code. When combined with debug info correlation [0] we are able to create an instrumented Clang binary that is only 150M (the vanilla Clang binary is 143M). That is an overhead of 7M (4.9%) compared to the default instrumentation (without value profiling) which has an overhead of 31M (21.7%). [0] https://groups.google.com/g/llvm-dev/c/r03Z6JoN7d4 Reviewed By: kyulee Differential Revision: https://reviews.llvm.org/D116180		2022-01-27 17:38:55 -08:00
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ContinuousSyncMode	Revert "[compiler-rt][Profile] Disable test on Arm/AArch64 Linux"	2021-09-06 08:45:06 +00:00
Darwin	[InstrProf] Add single byte coverage mode	2022-01-27 17:38:55 -08:00
Inputs	[InstrProf] Add single byte coverage mode	2022-01-27 17:38:55 -08:00
Linux	[InstrProf] Add single byte coverage mode	2022-01-27 17:38:55 -08:00
Posix	[compiler-rt][profile][AIX] pass extra link opts for test	2022-01-27 15:25:19 -06:00
Windows	[InstrProfiling] Delete linkage/visibility toggling for Windows	2021-06-02 16:49:54 -07:00
CMakeLists.txt	[CMake][profile] Don't use `TARGET lld` to avoid ordering issues	2021-02-22 23:33:21 -08:00
coverage-inline.cpp	…
coverage_comments.cpp	[test] Fix compiler-rt/test/profile/coverage_emptylines.cpp if the build directory is under /tmp	2020-12-10 16:57:10 -08:00
coverage_emptylines.cpp	[test] Fix compiler-rt/test/profile/coverage_emptylines.cpp if the build directory is under /tmp	2020-12-10 16:57:10 -08:00
gcc-flag-compatibility.test	…
gcov-__gcov_flush-terminate.c	…
gcov-basic.c	…
gcov-complex-line.c	[llvm-cov][gcov] Optimize the cycle counting algorithm by skipping zero count cycles	2020-12-10 15:22:29 -08:00
gcov-dump-and-remove.c	…
infinite_loop.c	…
instrprof-basic.c	…
instrprof-bufferio.c	…
instrprof-coverage.c	[InstrProf] Add single byte coverage mode	2022-01-27 17:38:55 -08:00
instrprof-darwin-dead-strip.c	[profile] Specify "-V" to otool to get expected test output	2021-08-31 10:49:51 -07:00
instrprof-darwin-exports.c	…
instrprof-dump.c	…
instrprof-error.c	…
instrprof-gc-sections.c	[profile][test] Delete profraw directory so that tests are immune to format version upgrade	2021-06-18 16:44:03 -07:00
instrprof-gcov-exceptions.test	…
instrprof-gcov-multiple-bbs-single-line.test	…
instrprof-gcov-multithread_fork.test	…
instrprof-gcov-one-line-function.test	…
instrprof-gcov-switch.test	…
instrprof-gcov-two-objects.test	…
instrprof-get-filename.c	…
instrprof-hostname.c	…
instrprof-icall-promo.test	…
instrprof-lto-pgogen.c	[profile][test] Delete profraw directory so that tests are immune to format version upgrade	2021-06-18 16:44:03 -07:00
instrprof-merge-entry-cover.c	[InstrProf] Add single byte coverage mode	2022-01-27 17:38:55 -08:00
instrprof-merge-match.test	…
instrprof-merge.c	[Profile] Handle invalid profile data	2021-06-10 16:10:13 -07:00
instrprof-merging.cpp	…
instrprof-order-file.test	…
instrprof-override-filename-then-reset-default.c	…
instrprof-override-filename-with-env.c	…
instrprof-override-filename.c	…
instrprof-path.c	…
instrprof-reset-counters.c	…
instrprof-set-dir-mode.c	[compiler-rt][profile] Enable profile tests for AIX	2021-10-13 03:00:32 +00:00
instrprof-set-file-object-merging.c	[compiler-rt][profile] Enable profile tests for AIX	2021-10-13 03:00:32 +00:00
instrprof-set-file-object.c	[compiler-rt][profile] Enable profile tests for AIX	2021-10-13 03:00:32 +00:00
instrprof-set-filename-then-reset-default.c	…
instrprof-set-filename.c	…
instrprof-tmpdir.c	…
instrprof-value-prof-2.c	[PGO] Don't reference functions unless value profiling is enabled	2021-05-20 11:09:24 -07:00
instrprof-value-prof-evict.test	…
instrprof-value-prof-reset.c	…
instrprof-value-prof.c	[PGO] Don't reference functions unless value profiling is enabled	2021-05-20 11:09:24 -07:00
instrprof-value-prof.test	…
instrprof-version-mismatch.c	…
instrprof-without-libc.c	[Profile] Handle invalid profile data	2021-06-10 16:10:13 -07:00
instrprof-write-buffer-internal.c	[InstrProf][NFC] Do not assume size of counter type	2022-01-14 11:29:11 -08:00
instrprof-write-file-atexit-explicitly.c	…
instrprof-write-file-only.c	…
instrprof-write-file.c	…
lit.cfg.py	[compiler-rt][profile] Enable profile tests for AIX	2021-10-13 03:00:32 +00:00
lit.site.cfg.py.in	…
profile_test.h	…
runtime_infinite.c	…