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Bug building target libiberty for mips64vrel-elf toolchain
- From: Nick Clifton <nickc at redhat dot com>
- To: echristo at apple dot com, richard at codesourcery dot com
- Cc: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 29 Mar 2007 07:52:36 +0100
- Subject: Bug building target libiberty for mips64vrel-elf toolchain
Hi Eric, Hi Richard,
We recently ran across an ICE building a target libiberty for one of
the multilibs of the mips64vrel-elf toolchain:
.../libiberty/regex.c: In function 'byte_re_match_2_internal':
.../libiberty/regex.c:7481: error: insn does not satisfy its constraints:
(insn 5211 1697 1699 173 .../libiberty/regex.c:6589
(set (reg:SI 5 $5)
(lo_sum:SI (reg/f:SI 1104)
(symbol_ref:SI ("byte_reg_unset_dummy") [flags 0x6] <var_decl 0x2a9860bc60 byte_reg_unset_dummy>))) 204 {*lowsi_mips16} (nil)
(expr_list:REG_EQUAL (symbol_ref:SI ("byte_reg_unset_dummy") [flags 0x6] <var_decl 0x2a9860bc60 byte_reg_unset_dummy>)
(nil)))
.../libiberty/regex.c:7481: internal compiler error: in reload_cse_simplify_operands, at postreload.c:393
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make[3]: *** [regex.o] Error 1
make[3]: Leaving directory `.../mips64vrel-elf/mips64vrel-elf/mips16/libiberty'
This problem does not appear to affect other mips toolchains, but
that may just be a multilib issue. I found a simple workaround for
the problem:
Index: gcc/config/mips/mips.c
===================================================================
--- gcc/config/mips/mips.c (revision 123322)
+++ gcc/config/mips/mips.c (working copy)
@@ -2269,8 +2269,11 @@ mips_legitimize_const_move (enum machine
/* Split moves of symbolic constants into high/low pairs. */
if (splittable_symbolic_operand (src, mode))
{
- emit_insn (gen_rtx_SET (VOIDmode, dest, mips_split_symbol (dest, src)));
- return;
+ if (! TARGET_MIPS16)
+ {
+ emit_insn (gen_rtx_SET (VOIDmode, dest, mips_split_symbol (dest, src)));
+ return;
+ }
}
if (mips_tls_operand_p (src))
But I am pretty sure that this is the wrong solution. Since I am
not a MIPS expert however I am punting this problem to you guys. :-)
Cheers
Nick