Ilya Leoshkevich
dd0df13685
The following insn:
(insn (set (reg:DI %r2)
(sign_extend:DI (mem:SI
(const:DI (plus:DI (symbol_ref:DI ("*.LC0"))
(const_int 16)))))))
is correctly recognized by LRA as RIL alternative of extendsidi2
define_insn. However, when recognition runs after LRA, it returns RXY
alternative, which is incorrect, since the offset 16 points past the
end of of *.LC0 literal pool entry. Such addresses are normally
rejected by s390_decompose_address ().
This inconsistency confuses annotate_constant_pool_refs: the selected
alternative makes it proceed with annotation, only to find that the
annotated address is invalid, causing ICE.
This patch fixes the root cause, namely, that s390_check_qrst_address ()
behaves differently during and after LRA.
gcc/ChangeLog:
2019-02-12 Ilya Leoshkevich <iii@linux.ibm.com>
PR target/89233
* config/s390/s390.c (s390_decompose_address): Update comment.
(s390_check_qrst_address): Reject invalid address forms after
LRA.
gcc/testsuite/ChangeLog:
2019-02-12 Ilya Leoshkevich <iii@linux.ibm.com>
PR target/89233
* gcc.target/s390/pr89233.c: New test.
From-SVN: r268798
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