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55 lines
2.1 KiB
Diff
55 lines
2.1 KiB
Diff
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33256
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--- a/gcc/config/mips/mips.c
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+++ b/gcc/config/mips/mips.c
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@@ -1252,6 +1252,20 @@ mips_split_const (rtx x, rtx *base, HOST
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*base = x;
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}
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+/* Classify symbolic expression X, given that it appears in context
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+ CONTEXT. */
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+
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+static enum mips_symbol_type
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+mips_classify_symbolic_expression (rtx x)
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+{
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+ HOST_WIDE_INT offset;
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+
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+ mips_split_const (x, &x, &offset);
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+ if (UNSPEC_ADDRESS_P (x))
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+ return UNSPEC_ADDRESS_TYPE (x);
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+
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+ return mips_classify_symbol (x);
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+}
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/* Return true if SYMBOL is a SYMBOL_REF and OFFSET + SYMBOL points
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to the same object as SYMBOL. */
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@@ -1493,8 +1507,17 @@ mips_classify_address (struct mips_addre
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info->type = ADDRESS_LO_SUM;
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info->reg = XEXP (x, 0);
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info->offset = XEXP (x, 1);
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+ /* We have to trust the creator of the LO_SUM to do something vaguely
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+ sane. Target-independent code that creates a LO_SUM should also
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+ create and verify the matching HIGH. Target-independent code that
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+ adds an offset to a LO_SUM must prove that the offset will not
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+ induce a carry. Failure to do either of these things would be
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+ a bug, and we are not required to check for it here. The MIPS
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+ backend itself should only create LO_SUMs for valid symbolic
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+ constants, with the high part being either a HIGH or a copy
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+ of _gp. */
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+ info->symbol_type = mips_classify_symbolic_expression (info->offset);
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return (mips_valid_base_register_p (info->reg, mode, strict)
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- && mips_symbolic_constant_p (info->offset, &info->symbol_type)
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&& mips_symbolic_address_p (info->symbol_type, mode)
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&& mips_lo_relocs[info->symbol_type] != 0);
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@@ -5575,7 +5598,8 @@ print_operand_reloc (FILE *file, rtx op,
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rtx base;
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HOST_WIDE_INT offset;
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- if (!mips_symbolic_constant_p (op, &symbol_type) || relocs[symbol_type] == 0)
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+ symbol_type = mips_classify_symbolic_expression (op);
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+ if (relocs[symbol_type] == 0)
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fatal_insn ("PRINT_OPERAND, invalid operand for relocation", op);
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/* If OP uses an UNSPEC address, we want to print the inner symbol. */
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