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[toolchain] gcc: fix 4.1.2 ICE on mips (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33256)

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18029 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nico 2009-10-11 02:52:08 +00:00
parent adbb0c8af6
commit 6b2799621a
1 changed files with 54 additions and 0 deletions
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54
toolchain/gcc/patches/4.1.2/953-bug_33256.patch Normal file
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@ -0,0 +1,54 @@
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33256
--- a/gcc/config/mips/mips.c
+++ b/gcc/config/mips/mips.c
@@ -1252,6 +1252,20 @@ mips_split_const (rtx x, rtx *base, HOST
*base = x;
}
+/* Classify symbolic expression X, given that it appears in context
+ CONTEXT. */
+
+static enum mips_symbol_type
+mips_classify_symbolic_expression (rtx x)
+{
+ HOST_WIDE_INT offset;
+
+ mips_split_const (x, &x, &offset);
+ if (UNSPEC_ADDRESS_P (x))
+ return UNSPEC_ADDRESS_TYPE (x);
+
+ return mips_classify_symbol (x);
+}
/* Return true if SYMBOL is a SYMBOL_REF and OFFSET + SYMBOL points
to the same object as SYMBOL. */
@@ -1493,8 +1507,17 @@ mips_classify_address (struct mips_addre
info->type = ADDRESS_LO_SUM;
info->reg = XEXP (x, 0);
info->offset = XEXP (x, 1);
+ /* We have to trust the creator of the LO_SUM to do something vaguely
+ sane. Target-independent code that creates a LO_SUM should also
+ create and verify the matching HIGH. Target-independent code that
+ adds an offset to a LO_SUM must prove that the offset will not
+ induce a carry. Failure to do either of these things would be
+ a bug, and we are not required to check for it here. The MIPS
+ backend itself should only create LO_SUMs for valid symbolic
+ constants, with the high part being either a HIGH or a copy
+ of _gp. */
+ info->symbol_type = mips_classify_symbolic_expression (info->offset);
return (mips_valid_base_register_p (info->reg, mode, strict)
- && mips_symbolic_constant_p (info->offset, &info->symbol_type)
&& mips_symbolic_address_p (info->symbol_type, mode)
&& mips_lo_relocs[info->symbol_type] != 0);
@@ -5575,7 +5598,8 @@ print_operand_reloc (FILE *file, rtx op,
rtx base;
HOST_WIDE_INT offset;
- if (!mips_symbolic_constant_p (op, &symbol_type) || relocs[symbol_type] == 0)
+ symbol_type = mips_classify_symbolic_expression (op);
+ if (relocs[symbol_type] == 0)
fatal_insn ("PRINT_OPERAND, invalid operand for relocation", op);
/* If OP uses an UNSPEC address, we want to print the inner symbol. */