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4fbe8f4438
For h8300-elf, gcc.dg/pr114768.c fails when compiled with -O2 -msx since
cselib_redundant_set_p returns true when called with
(gdb) call debug (set)
(set (mem:HI (reg/f:SI 0 r0 [orig:21 p ] [21]) [1 *p_3(D)+0 S2 A16])
(mem/v:HI (reg/f:SI 0 r0 [orig:21 p ] [21]) [1 MEM[(volatile int *)p_3(D)]+0 S2 A16]))
(gdb)
from reload_cse_regs. Update cselib_redundant_set_p to return false for
volatile memory source or destination.
gcc/
PR target/122343
* cselib.cc (cselib_redundant_set_p): Return false for volatile
memory source or destination.
gcc/testsuite/
PR target/122343
* gcc.dg/pr122343-1.c: New test.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
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