http://llvm.org/bugs/show_bug.cgi?id=10889
Summary: -fplugin-arg-dragonegg-enable-gcc-optzns/vector-select
performance regression in capacita
Product: dragonegg
Version: trunk
Platform: Macintosh
OS/Version: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: New Bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
At r139290, llvm/dragonegg svn shows a major performance regression in the
run-time of the Polyhedron 2005 capacita benchmark compiled with...
/sw/lib/gcc4.6/bin/gfortran -fplugin=/sw/lib/gcc4.6/lib/dragonegg.so -msse4
-ffast-math -funroll-loops -O3 -fplugin-arg-dragonegg-enable-gcc-optzns
capacita.f90 -o capacita
Benchmark Compile Executable Ave Run Number Estim
Name (secs) (bytes) (secs) Repeats Err %
--------- ------- ---------- ------- ------- ------
capacita 0.75 45408 398.86 1100.0000
vs when compiled without -fplugin-arg-dragonegg-enable-gcc-optzns...
Benchmark Compile Executable Ave Run Number Estim
Name (secs) (bytes) (secs) Repeats Err %
--------- ------- ---------- ------- ------- ------
capacita 0.49 41416 44.98 1100.0000
Note these are from quick.par runs as the benchmark now runs so slowly. With
the new vector-select code enabled using
-fplugin-arg-dragonegg-enable-gcc-optzns, the capacita benchmark shows a ~9
fold regression in execution time.
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