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33 lines
1.1 KiB
Diff
33 lines
1.1 KiB
Diff
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diff -durN gcc-3.4.6.orig/gcc/config/arm/arm.c gcc-3.4.6/gcc/config/arm/arm.c
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--- gcc-3.4.6.orig/gcc/config/arm/arm.c 2007-08-15 22:57:51.000000000 +0200
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+++ gcc-3.4.6/gcc/config/arm/arm.c 2007-08-15 22:57:51.000000000 +0200
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@@ -4572,6 +4572,10 @@
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int
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adjacent_mem_locations (rtx a, rtx b)
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{
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+ /* We don't guarantee to preserve the order of these memory refs. */
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+ if (volatile_refs_p (a) || volatile_refs_p (b))
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+ return 0;
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+
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if ((GET_CODE (XEXP (a, 0)) == REG
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|| (GET_CODE (XEXP (a, 0)) == PLUS
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&& GET_CODE (XEXP (XEXP (a, 0), 1)) == CONST_INT))
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@@ -4611,6 +4615,17 @@
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return 0;
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val_diff = val1 - val0;
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+
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+ if (arm_ld_sched)
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+ {
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+ /* If the target has load delay slots, then there's no benefit
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+ to using an ldm instruction unless the offset is zero and
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+ we are optimizing for size. */
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+ return (optimize_size && (REGNO (reg0) == REGNO (reg1))
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+ && (val0 == 0 || val1 == 0 || val0 == 4 || val1 == 4)
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+ && (val_diff == 4 || val_diff == -4));
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+ }
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+
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return ((REGNO (reg0) == REGNO (reg1))
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&& (val_diff == 4 || val_diff == -4));
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}
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