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| author | segher <segher@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-10-09 19:45:50 +0000 |
|---|---|---|
| committer | segher <segher@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-10-09 19:45:50 +0000 |
| commit | 17b42f31ac5c75cc5149ec4b3543ba119040bf31 (patch) | |
| tree | 9e9b0e1f217dfe5f6fd975ad32716e80b1390b93 | |
| parent | 3bdb5a4dea9990c6ee0fa501797c1056cb3d2670 (diff) | |
| download | gcc-17b42f31ac5c75cc5149ec4b3543ba119040bf31.tar.gz | |
combine: Use insn_cost instead of pattern_cost everywhere
* combine.c (combine_validate_cost): Compute the new insn_cost,
not just pattern_cost.
(try_combine): Adjust comment.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@253561 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/combine.c | 31 |
2 files changed, 31 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index cf83fd95aff..dfb19231a98 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2017-10-09 Segher Boessenkool <segher@kernel.crashing.org> + * combine.c (combine_validate_cost): Compute the new insn_cost, + not just pattern_cost. + (try_combine): Adjust comment. + +2017-10-09 Segher Boessenkool <segher@kernel.crashing.org> + * cfgrtl.c (rtl_account_profile_record): Replace insn_rtx_cost with insn_cost. * combine.c (uid_insn_cost): Adjust comment. diff --git a/gcc/combine.c b/gcc/combine.c index 5f1cbca9550..b89ee6da345 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -856,7 +856,7 @@ combine_validate_cost (rtx_insn *i0, rtx_insn *i1, rtx_insn *i2, rtx_insn *i3, int new_i2_cost, new_i3_cost; int old_cost, new_cost; - /* Lookup the original insn_rtx_costs. */ + /* Lookup the original insn_costs. */ i2_cost = INSN_COST (i2); i3_cost = INSN_COST (i3); @@ -888,11 +888,23 @@ combine_validate_cost (rtx_insn *i0, rtx_insn *i1, rtx_insn *i2, rtx_insn *i3, old_cost -= i1_cost; - /* Calculate the replacement pattern_costs. */ - new_i3_cost = pattern_cost (newpat, optimize_this_for_speed_p); + /* Calculate the replacement insn_costs. */ + rtx tmp = PATTERN (i3); + PATTERN (i3) = newpat; + int tmpi = INSN_CODE (i3); + INSN_CODE (i3) = -1; + new_i3_cost = insn_cost (i3, optimize_this_for_speed_p); + PATTERN (i3) = tmp; + INSN_CODE (i3) = tmpi; if (newi2pat) { - new_i2_cost = pattern_cost (newi2pat, optimize_this_for_speed_p); + tmp = PATTERN (i2); + PATTERN (i2) = newi2pat; + tmpi = INSN_CODE (i2); + INSN_CODE (i2) = -1; + new_i2_cost = insn_cost (i2, optimize_this_for_speed_p); + PATTERN (i2) = tmp; + INSN_CODE (i2) = tmpi; new_cost = (new_i2_cost > 0 && new_i3_cost > 0) ? new_i2_cost + new_i3_cost : 0; } @@ -907,7 +919,14 @@ combine_validate_cost (rtx_insn *i0, rtx_insn *i1, rtx_insn *i2, rtx_insn *i3, int old_other_cost, new_other_cost; old_other_cost = INSN_COST (undobuf.other_insn); - new_other_cost = pattern_cost (newotherpat, optimize_this_for_speed_p); + tmp = PATTERN (undobuf.other_insn); + PATTERN (undobuf.other_insn) = newotherpat; + tmpi = INSN_CODE (undobuf.other_insn); + INSN_CODE (undobuf.other_insn) = -1; + new_other_cost = insn_cost (undobuf.other_insn, + optimize_this_for_speed_p); + PATTERN (undobuf.other_insn) = tmp; + INSN_CODE (undobuf.other_insn) = tmpi; if (old_other_cost > 0 && new_other_cost > 0) { old_cost += old_other_cost; @@ -4080,7 +4099,7 @@ try_combine (rtx_insn *i3, rtx_insn *i2, rtx_insn *i1, rtx_insn *i0, } } - /* Only allow this combination if insn_rtx_costs reports that the + /* Only allow this combination if insn_cost reports that the replacement instructions are cheaper than the originals. */ if (!combine_validate_cost (i0, i1, i2, i3, newpat, newi2pat, other_pat)) { |