expmed.c (store_bit_field): Reset alias set for memory.
2002-03-13 Aldy Hernandez <aldyh@redhat.com> * expmed.c (store_bit_field): Reset alias set for memory. (extract_bit_field): Same. From-SVN: r50707
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@ -1,3 +1,8 @@
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2002-03-13 Aldy Hernandez <aldyh@redhat.com>
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* expmed.c (store_bit_field): Reset alias set for memory.
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(extract_bit_field): Same.
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2002-03-12 Chris Meyer <cmeyer@gatan.com>
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* genflags.c (gen_insn): Use IS_VSPACE.
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18
gcc/expmed.c
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gcc/expmed.c
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@ -392,6 +392,15 @@ store_bit_field (str_rtx, bitsize, bitnum, fieldmode, value, total_size)
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}
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}
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/* We may be accessing data outside the field, which means
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we can alias adjacent data. */
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if (GET_CODE (op0) == MEM)
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{
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op0 = shallow_copy_rtx (op0);
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set_mem_alias_set (op0, 0);
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set_mem_expr (op0, 0);
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}
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/* If OP0 is a register, BITPOS must count within a word.
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But as we have it, it counts within whatever size OP0 now has.
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On a bigendian machine, these are not the same, so convert. */
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@ -1069,6 +1078,15 @@ extract_bit_field (str_rtx, bitsize, bitnum, unsignedp,
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}
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}
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/* We may be accessing data outside the field, which means
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we can alias adjacent data. */
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if (GET_CODE (op0) == MEM)
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{
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op0 = shallow_copy_rtx (op0);
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set_mem_alias_set (op0, 0);
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set_mem_expr (op0, 0);
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}
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/* ??? We currently assume TARGET is at least as big as BITSIZE.
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If that's wrong, the solution is to test for it and set TARGET to 0
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if needed. */
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