rs6000-string.c (expand_compare_loop, [...]): Insert REG_BR_PROB notes in inline...

2019-02-09  Aaron Sawdey  <acsawdey@linux.ibm.com>

	* config/rs6000/rs6000-string.c (expand_compare_loop,
	expand_block_compare): Insert REG_BR_PROB notes in inline expansion of
	memcmp/strncmp.

From-SVN: r268724

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c6a97e1b4c0de0ec5f4b34c237aecefc22a56bb5..b0cfc0f1ed5ab55f05a9fb5ac8b0780287ee67aa 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-02-09  Aaron Sawdey  <acsawdey@linux.ibm.com>
+
+       * config/rs6000/rs6000-string.c (expand_compare_loop,
+       expand_block_compare): Insert REG_BR_PROB notes in inline expansion of
+       memcmp/strncmp.
+
 2019-02-09  Jakub Jelinek  <jakub@redhat.com>
 
        PR middle-end/89246

diff --git a/gcc/config/rs6000/rs6000-string.c b/gcc/config/rs6000/rs6000-string.c
index 7101dc77e081570b654fb8730dc625243d637359..560ecbaccc7b203b0b6f859eca76fca7488996f1 100644 (file)
--- a/gcc/config/rs6000/rs6000-string.c
+++ b/gcc/config/rs6000/rs6000-string.c
@@ -1525,6 +1525,7 @@ expand_compare_loop (rtx operands[])
          else
            j = emit_jump_insn (gen_bdnztf_si (fc_loop, ctr, ctr,
                                               eqrtx, cond));
+         add_reg_br_prob_note (j, profile_probability::likely ());
          JUMP_LABEL (j) = fc_loop;
          LABEL_NUSES (fc_loop) += 1;
 
@@ -1896,7 +1897,8 @@ expand_block_compare_gpr(unsigned HOST_WIDE_INT bytes, unsigned int base_align,
              rtx ne_rtx = gen_rtx_NE (VOIDmode, cond, const0_rtx);
              rtx ifelse = gen_rtx_IF_THEN_ELSE (VOIDmode, ne_rtx,
                                                 cvt_ref, pc_rtx);
-             rtx j = emit_jump_insn (gen_rtx_SET (pc_rtx, ifelse));
+             rtx_insn *j = emit_jump_insn (gen_rtx_SET (pc_rtx, ifelse));
+             add_reg_br_prob_note (j, profile_probability::likely ());
              JUMP_LABEL (j) = convert_label;
              LABEL_NUSES (convert_label) += 1;
            }