[Bug middle-end/42479] Wrong code with -floop-block

["dominiq at lps dot ens dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #3 from dominiq at lps dot ens dot fr  2010-01-05 12:56 -------
Profiling without -floop-block

+ 99.8%, start, a.out
| + 99.8%, main, a.out
| | + 99.8%, induct_, a.out
| | | + 77.5%, __mqc_m_MOD_mutual_ind_quad_cir_coil, a.out
| | | |   2.8%, cosisin, libSystem.B.dylib
| | | | - 1.0%, cexp$fenv_access_off, libSystem.B.dylib
| | | | - 0.2%, asin, libSystem.B.dylib
| | | |   0.1%, cos$fenv_access_off, libSystem.B.dylib
| | | |   0.1%, _gfortran_transpose_r8, libgfortran.3.dylib
| | | |   0.0%, dyld_stub_cexp, a.out
| | | |   0.0%, dyld_stub_asin, a.out
| | | |   0.0%, dyld_stub__gfortran_transpose_r8, a.out
| | | - 21.9%, __mqr_m_MOD_mutual_ind_quad_rec_coil, a.out
| | | - 0.1%, __s_rect_m_MOD_rect_self_inductance, a.out
| | | - 0.1%, __rect_r_m_MOD_rect_resistance, a.out
| | |   0.0%, log, libSystem.B.dylib
| | | - 0.0%, __gen_resq_mesh_m_MOD_gen_resq_mesh, a.out
| | | - 0.0%, __mcr_m_MOD_mutual_ind_cir_rec_coils, a.out
| | | - 0.0%, free_large, libSystem.B.dylib
| | |   0.0%, cos$fenv_access_off, libSystem.B.dylib
| | | - 0.0%, __mcc_m_MOD_mutual_ind_cir_cir_coils, a.out
| | | - 0.0%, __define_wand_coils_m_MOD_define_wand_coils, a.out
| | | - 0.0%, __computer_time_m_MOD_computer_time, a.out

with -floop-block

+ 99.6%, start, a.out
| + 99.6%, main, a.out
| | + 99.6%, induct_, a.out
| | | + 59.1%, __mqr_m_MOD_mutual_ind_quad_rec_coil, a.out
| | | | + 0.1%, asin, libSystem.B.dylib
| | | | |   0.0%, sqrtl, libSystem.B.dylib
| | | |   0.1%, _gfortran_transpose_r8, libgfortran.3.dylib
| | | |   0.1%, cos$fenv_access_off, libSystem.B.dylib
| | | |   0.0%, dyld_stub_cos, a.out
| | | - 39.4%, __mqc_m_MOD_mutual_ind_quad_cir_coil, a.out
| | | - 0.4%, __s_rect_m_MOD_rect_self_inductance, a.out
| | | - 0.3%, __rect_r_m_MOD_rect_resistance, a.out
| | |   0.1%, log, libSystem.B.dylib
| | | - 0.1%, __gen_resq_mesh_m_MOD_gen_resq_mesh, a.out
| | |   0.0%, __mcr_m_MOD_mutual_ind_cir_rec_coils, a.out
| | | - 0.0%, free_large, libSystem.B.dylib
| | |   0.0%, asin, libSystem.B.dylib
| | |   0.0%, __mcc_m_MOD_mutual_ind_cir_cir_coils, a.out
| | | - 0.0%, __gen_resq_mesh_m_MOD_gen_resq_mesh_size, a.out
| | | - 0.0%, __define_wand_coils_m_MOD_define_wand_coils, a.out
| |   0.0%, __mqc_m_MOD_mutual_ind_quad_cir_coil, a.out

The miscompiled subroutine being mutual_ind_quad_rec_coil.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42479