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| author | Bernd Schmidt <bernds@codesourcery.com> | 2010-06-04 12:44:01 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2010-06-04 12:44:01 +0000 |
| commit | 8ff49c29fd93d56df978cfe1e4e41812251d7773 (patch) | |
| tree | 2c2e8b8f4d4f62d949c6bbb9dc5113108d6f3f8e /gcc/reload.h | |
| parent | 95c5655ce9ccbf00ad109f2def9e9858005e4faf (diff) | |
| download | gcc-8ff49c29fd93d56df978cfe1e4e41812251d7773.zip gcc-8ff49c29fd93d56df978cfe1e4e41812251d7773.tar.gz gcc-8ff49c29fd93d56df978cfe1e4e41812251d7773.tar.bz2 | |
re PR rtl-optimization/39871 (Code size increase on ARM due to poor register allocation)
PR rtl-optimization/39871
PR rtl-optimization/40615
PR rtl-optimization/42500
PR rtl-optimization/42502
* ira.c (init_reg_equiv_memory_loc: New function.
(ira): Call it twice.
* reload.h (calculate_elim_costs_all_insns): Declare.
* ira-costs.c: Include "reload.h".
(regno_equiv_gains): New static variable.
(init_costs): Allocate it.
(finish_costs): Free it.
(ira_costs): Call calculate_elim_costs_all_insns.
(find_costs_and_classes): Take estimated elimination costs
into account.
(ira_adjust_equiv_reg_cost): New function.
* ira.h (ira_adjust_equiv_reg_cost): Declare it.
* reload1.c (init_eliminable_invariants, free_reg_equiv,
elimination_costs_in_insn, note_reg_elim_costly): New static
functions.
(elim_bb): New static variable.
(reload): Move code out of here into init_eliminable_invariants and
free_reg_equiv. Call them.
(calculate_elim_costs_all_insns): New function.
(eliminate_regs_1): Declare. Add extra arg FOR_COSTS;
all callers changed. If FOR_COSTS is true, don't call alter_reg,
but call note_reg_elim_costly if we turned a valid memory address
into an invalid one.
* Makefile.in (ira-costs.o): Depend on reload.h.
testsuite/
PR rtl-optimization/39871
PR rtl-optimization/40615
PR rtl-optimization/42500
PR rtl-optimization/42502
* gcc.target/arm/eliminate.c: New test.
From-SVN: r160260
Diffstat (limited to 'gcc/reload.h')
| -rw-r--r-- | gcc/reload.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/reload.h b/gcc/reload.h index a285670..8168b51 100644 --- a/gcc/reload.h +++ b/gcc/reload.h @@ -349,6 +349,10 @@ extern void mark_home_live (int); extern rtx eliminate_regs (rtx, enum machine_mode, rtx); extern bool elimination_target_reg_p (rtx); +/* Called from the register allocator to estimate costs of eliminating + invariant registers. */ +extern void calculate_elim_costs_all_insns (void); + /* Deallocate the reload register used by reload number R. */ extern void deallocate_reload_reg (int r); |