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[Bug rtl-optimization/50904] Induct benchmark of polyhedron slows down when -fno-protect-parens is enabled by -Ofast.
- From: "dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 30 Oct 2011 11:34:15 +0000
- Subject: [Bug rtl-optimization/50904] Induct benchmark of polyhedron slows down when -fno-protect-parens is enabled by -Ofast.
- Auto-submitted: auto-generated
- References: <bug-50904-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50904
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-10-30 11:34:15 UTC ---
Created attachment 25666
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25666
Further reduced test for induct.f90
The reduced test contains a single et of nested loops in
mutual_ind_quad_cir_coil. Using the main program in
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34265#c34 (induct_red.f90), the
execution time is 2.0s when induct_qc.f90 is compiled with -Ofast and 1.8s when
it is compiled with -fprotect-parens -Ofast.