[Bug middle-end/114653] Not vectorizing the loop with openmp reduction.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114653 kugan at gcc dot gnu.org changed: What|Removed |Added Resolution|--- |DUPLICATE Status|UNCONFIRMED |RESOLVED --- Comment #6 from kugan at gcc dot gnu.org --- Duplicate *** This bug has been marked as a duplicate of bug 114635 ***
[Bug middle-end/114653] Not vectorizing the loop with openmp reduction.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114653 --- Comment #5 from kugan at gcc dot gnu.org --- ddd for the : ref_a: _57 = D.4803[_20]; ref_b: D.4803[_20] = _ifc__174; We get DDR_ARE_DEPENDENT (ddr) == chrec_dont_know. Hence apply_safelen ().
[Bug middle-end/114653] Not vectorizing the loop with openmp reduction.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114653 --- Comment #4 from kugan at gcc dot gnu.org --- This particular loop has loop->safelen set to 16. Does this mean this can never be loop vectorized for VLA?
[Bug middle-end/114653] Not vectorizing the loop with openmp reduction.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114653
--- Comment #3 from kugan at gcc dot gnu.org ---
For SVE mode in vect_analyze_loop_2, we have
(gdb) p min_vf
$15 = {coeffs = {4, 4}}
(gdb) p max_vf
$16 = 16
Thus maybe_lt (max_vf, min_vf)) is false. This results in bad data dependence.
[Bug middle-end/114653] Not vectorizing the loop with openmp reduction.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114653 --- Comment #2 from kugan at gcc dot gnu.org --- Thanks. I see the following in the log: test.cpp:33:53: missed: not vectorized: relevant stmt not supported: _54 = .MASK_LOAD (_53, 32B, _171); test.cpp:22:19: missed: bad operation or unsupported loop bound. test.cpp:22:19: note: * Analysis failed with vector mode V4SF test.cpp:22:19: note: === vect_analyze_data_ref_dependences === test.cpp:22:19: missed: bad data dependence. test.cpp:22:19: note: * Analysis failed with vector mode VNx16QI test.cpp:33:53: missed: not vectorized: relevant stmt not supported: _54 = .MASK_LOAD (_53, 32B, _171); test.cpp:22:19: missed: bad operation or unsupported loop bound. test.cpp:22:19: note: * Analysis failed with vector mode V8QI test.cpp:22:19: note: === vect_analyze_data_ref_dependences === test.cpp:22:19: missed: bad data dependence. test.cpp:22:19: note: * Analysis failed with vector mode VNx8QI test.cpp:33:53: missed: not vectorized: relevant stmt not supported: _54 = .MASK_LOAD (_53, 32B, _171); test.cpp:22:19: missed: bad operation or unsupported loop bound. test.cpp:22:19: note: * Analysis failed with vector mode V4HI test.cpp:22:19: note: === vect_analyze_data_ref_dependences === test.cpp:22:19: missed: bad data dependence. test.cpp:22:19: note: * Analysis failed with vector mode VNx4QI test.cpp:33:53: missed: not vectorized: relevant stmt not supported: _54 = .MASK_LOAD (_53, 32B, _171); test.cpp:22:19: missed: bad operation or unsupported loop bound. test.cpp:22:19: note: * Analysis failed with vector mode V2SI test.cpp:22:19: note: worklist: examine stmt: _57 = D.4803[_20]; test.cpp:22:19: note: === vect_analyze_data_ref_dependences === test.cpp:22:19: missed: bad data dependence. test.cpp:22:19: note: * Analysis failed with vector mode VNx2QI test.cpp:22:19: missed: couldn't vectorize loop test.cpp:22:19: missed: bad data dependence.
[Bug middle-end/114653] Not vectorizing the loop with openmp reduction.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114653 Richard Biener changed: What|Removed |Added Blocks||53947 Keywords||openmp Summary|Not vectoring the loop with |Not vectorizing the loop |openmp reduction. |with openmp reduction. --- Comment #1 from Richard Biener --- Note the cited problem isn't the problem. There's several OMP reduction vectorizing PRs already. Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947 [Bug 53947] [meta-bug] vectorizer missed-optimizations
