This is v3 of this patch kit; previous versions were:
v2: https://gcc.gnu.org/ml/gcc-patches/2018-07/msg00446.html
v1: https://gcc.gnu.org/ml/gcc-patches/2018-06/msg01462.html
The overall goal of this patch kit is to make the output of
-fopt-info more readable for technically-advanced end-users,
whilst preserving the existing output for dump files.
The aim is to (by default) replace the current "wall of text"
output for -fopt-info-vec-all with a summary of the status for
each loop, giving either:
<LOOP-LOCATION>: vectorized this loop via <METHOD>
or:
<LOOP-LOCATION>: couldn't vectorize this loop
<PROBLEM-LOCATION>: because of <REASON>
In particular, the "reason" message uses the location of the
problematic construct, rather than reusing that of the loop.
For example:
no-vfa-vect-102.c:24:3: missed: couldn't vectorize loop
no-vfa-vect-102.c:27:7: missed: statement clobbers memory: __asm__
__volatile__("" : : : "memory");
Patch 1 fixes an bug in -fopt-info with plugin passes, needed by
the other patches since they add a plugin to the testsuite to test
-fopt-info output.
Patches 2 and 3 introduce a verbosity level to dump messages:
"user-facing" vs "internals", suppressing "internals" messages by
default within -fopt-info, along with a way to propagate
information about a specific problem back up to the top level
and report it (class opt_problem), and a way to re-enable the
"internals" output in -fopt-info; see those patches for more
information.
The patches now bootstrap & pass regression testing on
x86_64-pc-linux-gnu; I'm hoping to get this into trunk for GCC 9.
Thanks
Dave
David Malcolm (3):
Fix -fopt-info for plugin passes
Add -fopt-info-internals
v3: Report vectorization problems via a new opt_problem class
gcc/Makefile.in | 1 +
gcc/doc/invoke.texi | 31 +-
gcc/dump-context.h | 106 ++++-
gcc/dumpfile.c | 490 ++++++++++++---------
gcc/dumpfile.h | 60 ++-
gcc/opt-problem.cc | 335 ++++++++++++++
gcc/opt-problem.h | 289 ++++++++++++
gcc/optinfo-emit-json.cc | 2 +-
gcc/optinfo.cc | 44 +-
gcc/optinfo.h | 7 +-
gcc/passes.c | 30 +-
gcc/selftest-run-tests.c | 1 +
gcc/selftest.h | 1 +
gcc/testsuite/gcc.dg/plugin/dump-1.c | 24 +
gcc/testsuite/gcc.dg/plugin/dump-2.c | 30 ++
gcc/testsuite/gcc.dg/plugin/dump_plugin.c | 143 ++++++
gcc/testsuite/gcc.dg/plugin/plugin.exp | 3 +
gcc/testsuite/gcc.dg/vect/nodump-vect-opt-info-2.c | 12 +
gcc/testsuite/gcc.dg/vect/vect-alias-check-4.c | 18 +-
gcc/tree-data-ref.c | 70 ++-
gcc/tree-data-ref.h | 10 +-
gcc/tree-predcom.c | 3 +-
gcc/tree-vect-data-refs.c | 347 +++++++--------
gcc/tree-vect-loop-manip.c | 6 +-
gcc/tree-vect-loop.c | 442 ++++++++-----------
gcc/tree-vect-slp.c | 4 +-
gcc/tree-vect-stmts.c | 275 +++++-------
gcc/tree-vectorizer.c | 17 +-
gcc/tree-vectorizer.h | 51 ++-
29 files changed, 1932 insertions(+), 920 deletions(-)
create mode 100644 gcc/opt-problem.cc
create mode 100644 gcc/opt-problem.h
create mode 100644 gcc/testsuite/gcc.dg/plugin/dump-1.c
create mode 100644 gcc/testsuite/gcc.dg/plugin/dump-2.c
create mode 100644 gcc/testsuite/gcc.dg/plugin/dump_plugin.c
create mode 100644 gcc/testsuite/gcc.dg/vect/nodump-vect-opt-info-2.c
--
1.8.5.3
