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-rw-r--r--toolchain/gcc/3.4.5/600-gcc34-arm-ldm-peephole.patch65
1 files changed, 65 insertions, 0 deletions
diff --git a/toolchain/gcc/3.4.5/600-gcc34-arm-ldm-peephole.patch b/toolchain/gcc/3.4.5/600-gcc34-arm-ldm-peephole.patch
new file mode 100644
index 0000000000..0c370502c8
--- /dev/null
+++ b/toolchain/gcc/3.4.5/600-gcc34-arm-ldm-peephole.patch
@@ -0,0 +1,65 @@
+--- gcc-3.4.0/gcc/config/arm/arm.md.arm-ldm-peephole 2004-01-13 08:24:37.000000000 -0500
++++ gcc-3.4.0/gcc/config/arm/arm.md 2004-04-24 18:18:04.000000000 -0400
+@@ -8810,13 +8810,16 @@
+ (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];
+@@ -8851,6 +8854,8 @@
+ }
+ 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-3.4.0/gcc/config/arm/arm.c.arm-ldm-peephole 2004-04-24 18:16:25.000000000 -0400
++++ gcc-3.4.0/gcc/config/arm/arm.c 2004-04-24 18:18:04.000000000 -0400
+@@ -4838,6 +4841,11 @@
+ *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 */
+
+@@ -5064,6 +5072,11 @@
+ *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 */
+
+--- gcc-3.4.0/gcc/genpeep.c.arm-ldm-peephole 2003-07-05 01:27:22.000000000 -0400
++++ gcc-3.4.0/gcc/genpeep.c 2004-04-24 18:18:04.000000000 -0400
+@@ -381,6 +381,7 @@
+ 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");