https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111901
--- Comment #11 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Eric Botcazou from comment #10)
> Is it really invalid to perform CSE on val though?
Later in the compilation pipeline, DCE removes insns 6 and 8 as dead code,
leaving:
_.c.331r.cmpelim:
10: {x1:SI=asm_operands;clobber [scratch];}
12: {x3:SI=asm_operands;clobber [scratch];}
13: x1:SI=x1:SI+x3:SI
15: NOTE_INSN_DELETED
20: x0:SI=x1:SI<<0x1
21: use x0:SI
