https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90608
Bug ID: 90608
Summary: Inline masked minlo/maxloc calls
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: ktkachov at gcc dot gnu.org
Target Milestone: ---
Created attachment 46402
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46402&action=edit
minloc example
One of the benchmarks we care about performs much better when compiled with
ifort than with gfortran. One of the differences seems to be due to ifort
inlining calls to some minloc/maxloc intrinsics whereas gfortran emits calls to
libgfortran, for example _gfortran_mminloc0_4_i4 to perform various
minloc/maxloc operations combined with a mask over array sections.
Inlining these intrinsics seems to enable further optimisations in the pipeline
like vectorisation
Attached is a small-but-representable standalone example of the kind of calls
it would be good to inline.
I'm not too familiar with Fortran and the frontend but it seems to inline some
minloc/maxloc intrinsics already in trans-intrinsic.c. Would it be possible to
beef it up?
