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| author | Vladimir Makarov <vmakarov@redhat.com> | 2013-10-25 21:06:38 +0000 |
|---|---|---|
| committer | Vladimir Makarov <vmakarov@gcc.gnu.org> | 2013-10-25 21:06:38 +0000 |
| commit | 01b1efaa1439e6cbf44566354dcce9a96d5c6f5e (patch) | |
| tree | 2ee1cb8d7e34ed805e6e3c69b0f6076f88fa163a /gcc/lra-spills.c | |
| parent | 3ff4317f1cfddf2e015db24a673e3ea5bf188920 (diff) | |
| download | gcc-01b1efaa1439e6cbf44566354dcce9a96d5c6f5e.zip gcc-01b1efaa1439e6cbf44566354dcce9a96d5c6f5e.tar.gz gcc-01b1efaa1439e6cbf44566354dcce9a96d5c6f5e.tar.bz2 | |
2013-10-25 Vladimir Makarov <vmakarov@redhat.com>
* config/rs6000/rs6000-protos.h
(rs6000_secondary_memory_needed_mode): New prototype.
* config/rs6000/rs6000.c: Include ira.h.
(TARGET_LRA_P): Redefine.
(rs6000_legitimate_offset_address_p): Call
legitimate_constant_pool_address_p in strict mode for LRA.
(rs6000_legitimate_address_p): Ditto.
(legitimate_lo_sum_address_p): Add code for LRA.
Use lra_in_progress.
(rs6000_emit_move): Add LRA version of code to generate load/store
of SDmode values.
(rs6000_secondary_memory_needed_mode): New.
(rs6000_alloc_sdmode_stack_slot): Do nothing for LRA.
(rs6000_secondary_reload_class): Return NO_REGS for LRA for
constants, memory, and FP registers.
(rs6000_lra_p): New.
* config/rs6000/rs6000.h (SECONDARY_MEMORY_NEEDED_MODE): New
macro.
* config/rs6000/rs6000.opt (mlra): New option.
* lra-spills.c (lra_final_code_change): Remove useless move insns.
From-SVN: r204079
Diffstat (limited to 'gcc/lra-spills.c')
| -rw-r--r-- | gcc/lra-spills.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/gcc/lra-spills.c b/gcc/lra-spills.c index 7c0c630..73a90a8 100644 --- a/gcc/lra-spills.c +++ b/gcc/lra-spills.c @@ -625,7 +625,7 @@ lra_final_code_change (void) { int i, hard_regno; basic_block bb; - rtx insn, curr; + rtx insn, curr, set; int max_regno = max_reg_num (); for (i = FIRST_PSEUDO_REGISTER; i < max_regno; i++) @@ -661,5 +661,19 @@ lra_final_code_change (void) } if (insn_change_p) lra_update_operator_dups (id); + + if ((set = single_set (insn)) != NULL + && REG_P (SET_SRC (set)) && REG_P (SET_DEST (set)) + && REGNO (SET_SRC (set)) == REGNO (SET_DEST (set))) + { + /* Remove an useless move insn. IRA can generate move + insns involving pseudos. It is better remove them + earlier to speed up compiler a bit. It is also + better to do it here as they might not pass final RTL + check in LRA, (e.g. insn moving a control register + into itself). */ + lra_invalidate_insn_data (insn); + delete_insn (insn); + } } } |