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| author | Bin Cheng <bin.cheng@arm.com> | 2012-10-19 05:42:24 +0000 |
|---|---|---|
| committer | Bin Cheng <amker@gcc.gnu.org> | 2012-10-19 05:42:24 +0000 |
| commit | b11f0116d6e5e89dca5b1bfd56ba54fda3e05bf7 (patch) | |
| tree | 9423fd10c44761618c568365bb200032573cfdf9 /gcc/doc | |
| parent | 8cba9a053644b2bfcbe64d644d01cf697b51b9c2 (diff) | |
| download | gcc-b11f0116d6e5e89dca5b1bfd56ba54fda3e05bf7.zip gcc-b11f0116d6e5e89dca5b1bfd56ba54fda3e05bf7.tar.gz gcc-b11f0116d6e5e89dca5b1bfd56ba54fda3e05bf7.tar.bz2 | |
common.opt (flag_ira_hoist_pressure): New.
gcc/ChangeLog
* common.opt (flag_ira_hoist_pressure): New.
* doc/invoke.texi (-fira-hoist-pressure): Describe.
* ira-costs.c (ira_set_pseudo_classes): New parameter.
* ira.h: Update copyright dates.
(ira_set_pseudo_classes): Update prototype.
* haifa-sched.c (sched_init): Update call.
* ira.c (ira): Update call.
* regmove.c: Update copyright dates.
(regmove_optimize): Update call.
* loop-invariant.c: Update copyright dates.
(move_loop_invariants): Update call.
* gcse.c: (struct bb_data): New structure.
(BB_DATA): New macro.
(curr_bb, curr_reg_pressure): New static variables.
(should_hoist_expr_to_dom): Rename from hoist_expr_reaches_here_p.
Change parameter expr_index to expr.
New parameters pressure_class, nregs and hoisted_bbs.
Use reg pressure to determine the distance expr can be hoisted.
(hoist_code): Use reg pressure to direct the hoist process.
(get_regno_pressure_class, get_pressure_class_and_nregs)
(change_pressure, calculate_bb_reg_pressure): New.
(one_code_hoisting_pass): Calculate register pressure. Allocate
and free data.
gcc/testsuite/ChangeLog
* testsuite/gcc.dg/hoist-register-pressure.c: New test.
From-SVN: r192604
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index f8c9230..a66dff1 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -372,7 +372,7 @@ Objective-C and Objective-C++ Dialects}. -finline-small-functions -fipa-cp -fipa-cp-clone @gol -fipa-pta -fipa-profile -fipa-pure-const -fipa-reference @gol -fira-algorithm=@var{algorithm} @gol --fira-region=@var{region} @gol +-fira-region=@var{region} -fira-hoist-pressure @gol -fira-loop-pressure -fno-ira-share-save-slots @gol -fno-ira-share-spill-slots -fira-verbose=@var{n} @gol -fivopts -fkeep-inline-functions -fkeep-static-consts @gol @@ -6996,6 +6996,14 @@ This typically results in the smallest code size, and is enabled by default for @end table +@item -fira-hoist-pressure +@opindex fira-hoist-pressure +Use IRA to evaluate register pressure in the code hoisting pass for +decisions to hoist expressions. This option usually results in smaller +code, but it can slow the compiler down. + +This option is enabled at level @option{-Os} for all targets. + @item -fira-loop-pressure @opindex fira-loop-pressure Use IRA to evaluate register pressure in loops for decisions to move |