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author | Revital Eres <revital.eres@linaro.org> | 2011-07-31 10:37:35 +0000 |
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committer | Revital Eres <revitale@gcc.gnu.org> | 2011-07-31 10:37:35 +0000 |
commit | dcaac07dbf07815294d7f8b1568ef9e157b57dae (patch) | |
tree | a85f97f3444494e2d405423a55348c5201edae89 | |
parent | 0291fa2509cbd6816d720aebfacdebffe1c9dcad (diff) | |
download | gcc-dcaac07dbf07815294d7f8b1568ef9e157b57dae.zip gcc-dcaac07dbf07815294d7f8b1568ef9e157b57dae.tar.gz gcc-dcaac07dbf07815294d7f8b1568ef9e157b57dae.tar.bz2 |
Move the creation of anti-dep edge
From-SVN: r176972
-rw-r--r-- | gcc/ChangeLog | 7 | ||||
-rw-r--r-- | gcc/ddg.c | 10 |
2 files changed, 11 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5372f24..c10b1e0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,12 @@ 2011-07-31 Revital Eres <revital.eres@linaro.org> + * ddg.c (create_ddg_dep_from_intra_loop_link): Remove the creation + of anti-dep edge from a branch. + (add_cross_iteration_register_deps): Create anti-dep edge from + a branch. + +2011-07-31 Revital Eres <revital.eres@linaro.org> + * modulo-sched.c: Change comment. (reset_sched_times): Fix print message. (print_partial_schedule): Add print info. @@ -197,11 +197,6 @@ create_ddg_dep_from_intra_loop_link (ddg_ptr g, ddg_node_ptr src_node, } } - /* If a true dep edge enters the branch create an anti edge in the - opposite direction to prevent the creation of reg-moves. */ - if ((DEP_TYPE (link) == REG_DEP_TRUE) && JUMP_P (dest_node->insn)) - create_ddg_dep_no_link (g, dest_node, src_node, ANTI_DEP, REG_DEP, 1); - latency = dep_cost (link); e = create_ddg_edge (src_node, dest_node, t, dt, latency, distance); add_edge_to_ddg (g, e); @@ -306,8 +301,11 @@ add_cross_iteration_register_deps (ddg_ptr g, df_ref last_def) gcc_assert (first_def_node); + /* Always create the edge if the use node is a branch in + order to prevent the creation of reg-moves. */ if (DF_REF_ID (last_def) != DF_REF_ID (first_def) - || !flag_modulo_sched_allow_regmoves) + || !flag_modulo_sched_allow_regmoves + || JUMP_P (use_node->insn)) create_ddg_dep_no_link (g, use_node, first_def_node, ANTI_DEP, REG_DEP, 1); |