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65 lines
2.4 KiB
65 lines
2.4 KiB
--- gcc-3.4.0/gcc/config/arm/arm.md.arm-ldm-peephole 2004-01-13 08:24:37.000000000 -0500 |
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+++ gcc-3.4.0/gcc/config/arm/arm.md 2004-04-24 18:18:04.000000000 -0400 |
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@@ -8810,13 +8810,16 @@ |
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(set_attr "length" "4,8,8")] |
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) |
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+; Try to convert LDR+LDR+arith into [add+]LDM+arith |
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+; On XScale, LDM is always slower than two LDRs, so only do this if |
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+; optimising for size. |
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(define_insn "*arith_adjacentmem" |
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[(set (match_operand:SI 0 "s_register_operand" "=r") |
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(match_operator:SI 1 "shiftable_operator" |
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[(match_operand:SI 2 "memory_operand" "m") |
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(match_operand:SI 3 "memory_operand" "m")])) |
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(clobber (match_scratch:SI 4 "=r"))] |
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- "TARGET_ARM && adjacent_mem_locations (operands[2], operands[3])" |
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+ "TARGET_ARM && (!arm_tune_xscale || optimize_size) && adjacent_mem_locations (operands[2], operands[3])" |
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"* |
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{ |
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rtx ldm[3]; |
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@@ -8851,6 +8854,8 @@ |
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} |
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if (val1 && val2) |
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{ |
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+ /* This would be a loss on a Harvard core, but adjacent_mem_locations() |
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+ will prevent it from happening. */ |
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rtx ops[3]; |
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ldm[0] = ops[0] = operands[4]; |
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ops[1] = XEXP (XEXP (operands[2], 0), 0); |
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--- gcc-3.4.0/gcc/config/arm/arm.c.arm-ldm-peephole 2004-04-24 18:16:25.000000000 -0400 |
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+++ gcc-3.4.0/gcc/config/arm/arm.c 2004-04-24 18:18:04.000000000 -0400 |
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@@ -4838,6 +4841,11 @@ |
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*load_offset = unsorted_offsets[order[0]]; |
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} |
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+ /* For XScale a two-word LDM is a performance loss, so only do this if |
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+ size is more important. See comments in arm_gen_load_multiple. */ |
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+ if (nops == 2 && arm_tune_xscale && !optimize_size) |
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+ return 0; |
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+ |
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if (unsorted_offsets[order[0]] == 0) |
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return 1; /* ldmia */ |
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@@ -5064,6 +5072,11 @@ |
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*load_offset = unsorted_offsets[order[0]]; |
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} |
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+ /* For XScale a two-word LDM is a performance loss, so only do this if |
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+ size is more important. See comments in arm_gen_load_multiple. */ |
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+ if (nops == 2 && arm_tune_xscale && !optimize_size) |
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+ return 0; |
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+ |
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if (unsorted_offsets[order[0]] == 0) |
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return 1; /* stmia */ |
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--- gcc-3.4.0/gcc/genpeep.c.arm-ldm-peephole 2003-07-05 01:27:22.000000000 -0400 |
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+++ gcc-3.4.0/gcc/genpeep.c 2004-04-24 18:18:04.000000000 -0400 |
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@@ -381,6 +381,7 @@ |
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printf ("#include \"recog.h\"\n"); |
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printf ("#include \"except.h\"\n\n"); |
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printf ("#include \"function.h\"\n\n"); |
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+ printf ("#include \"flags.h\"\n\n"); |
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printf ("#ifdef HAVE_peephole\n"); |
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printf ("extern rtx peep_operand[];\n\n");
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