diff options
Diffstat (limited to 'packages/gcc/gcc-3.3.4/arm-ldm-peephole.patch')
| -rw-r--r-- | packages/gcc/gcc-3.3.4/arm-ldm-peephole.patch | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/packages/gcc/gcc-3.3.4/arm-ldm-peephole.patch b/packages/gcc/gcc-3.3.4/arm-ldm-peephole.patch deleted file mode 100644 index 83b07e0343..0000000000 --- a/packages/gcc/gcc-3.3.4/arm-ldm-peephole.patch +++ /dev/null @@ -1,91 +0,0 @@ -2004-03-19 Philip Blundell <philb@gnu.org> - - * config/arm/arm.c (adjacent_mem_locations): Reject location pairs - where both offsets are nonzero if target is Harvard architecture. - (load_multiple_sequence, store_multiple_sequence): Avoid two-word - LDM/STM on XScale unless -Os. - * config/arm/arm.md (arith_adjacentmem): Inhibit if tuning for - XScale and not -Os. - * genpeep.c: Have generated code include flags.h. - ---- gcc/genpeep.c~ 2001-12-02 00:04:19.000000000 +0000 -+++ gcc/genpeep.c 2004-03-19 11:17:18.000000000 +0000 -@@ -402,6 +402,7 @@ - printf ("#include \"recog.h\"\n"); - printf ("#include \"except.h\"\n\n"); - printf ("#include \"function.h\"\n\n"); -+ printf ("#include \"flags.h\"\n\n"); - - printf ("#ifdef HAVE_peephole\n"); - printf ("extern rtx peep_operand[];\n\n"); - ---- gcc/config/arm/arm.md~ 2004-03-11 15:28:01.000000000 +0000 -+++ gcc/config/arm/arm.md 2004-03-19 13:00:03.000000000 +0000 -@@ -7958,13 +7958,16 @@ - (set_attr "length" "4,8,8")] - ) - -+; Try to convert LDR+LDR+arith into [add+]LDM+arith -+; On XScale, LDM is always slower than two LDRs, so only do this if -+; optimising for size. - (define_insn "*arith_adjacentmem" - [(set (match_operand:SI 0 "s_register_operand" "=r") - (match_operator:SI 1 "shiftable_operator" - [(match_operand:SI 2 "memory_operand" "m") - (match_operand:SI 3 "memory_operand" "m")])) - (clobber (match_scratch:SI 4 "=r"))] -- "TARGET_ARM && adjacent_mem_locations (operands[2], operands[3])" -+ "TARGET_ARM && (!arm_tune_xscale || optimize_size) && adjacent_mem_locations (operands[2], operands[3])" - "* - { - rtx ldm[3]; -@@ -7999,7 +8002,9 @@ - } - if (val1 && val2) - { -+ /* This would be a loss on a Harvard core, but adjacent_mem_locations() -+ will prevent it from happening. */ - rtx ops[3]; - ldm[0] = ops[0] = operands[4]; - ops[1] = XEXP (XEXP (operands[2], 0), 0); - ---- gcc/config/arm/arm.c~ 2004-03-11 15:28:01.000000000 +0000 -+++ gcc/config/arm/arm.c 2004-03-19 15:36:03.000000000 +0000 -@@ -3818,8 +3818,11 @@ - sequence. */ - if (!const_ok_for_op (PLUS, val0) || !const_ok_for_op (PLUS, val1)) - return 0; -- -- return (reg0 == reg1) && ((val1 - val0) == 4 || (val0 - val1) == 4); -+ -+ /* For Harvard cores, only accept pairs where one offset is zero. -+ See comment in load_multiple_sequence. */ -+ return (reg0 == reg1) && ((val1 - val0) == 4 || (val0 - val1) == 4) -+ && (!arm_ld_sched || val0 == 0 || val1 == 0); - } - return 0; - } -@@ -4075,6 +4078,11 @@ - *load_offset = unsorted_offsets[order[0]]; - } - -+ /* For XScale a two-word LDM is a performance loss, so only do this if -+ size is more important. See comments in arm_gen_load_multiple. */ -+ if (nops == 2 && arm_tune_xscale && !optimize_size) -+ return 0; -+ - if (unsorted_offsets[order[0]] == 0) - return 1; /* ldmia */ - -@@ -4307,6 +4315,11 @@ - *load_offset = unsorted_offsets[order[0]]; - } - -+ /* For XScale a two-word LDM is a performance loss, so only do this if -+ size is more important. See comments in arm_gen_load_multiple. */ -+ if (nops == 2 && arm_tune_xscale && !optimize_size) -+ return 0; -+ - if (unsorted_offsets[order[0]] == 0) - return 1; /* stmia */ - |