https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111901
--- Comment #8 from Uroš Bizjak <ubizjak at gmail dot com> ---
Compiling the testcase for aarch64-linux-gnu (-O2 -funroll-all-loops) still
performs CSE, despite the patch:
_.c.325r.reload:
6: {x0:SI=asm_operands;clobber [scratch];}
8: {x2:SI=asm_operands;clobber [scratch];}
10: {x1:SI=asm_operands;clobber [scratch];}
12: {x3:SI=asm_operands;clobber [scratch];}
13: x1:SI=x1:SI+x3:SI
14: x0:SI=x0:SI+x2:SI
15: NOTE_INSN_DELETED
20: x0:SI=x1:SI+x0:SI
21: use x0:SI
_.c.326r.postreload:
6: {x0:SI=asm_operands;clobber [scratch];}
8: {x2:SI=asm_operands;clobber [scratch];}
10: {x1:SI=asm_operands;clobber [scratch];}
12: {x3:SI=asm_operands;clobber [scratch];}
13: x1:SI=x1:SI+x3:SI
14: x0:SI=x1:SI <-- **here**
15: NOTE_INSN_DELETED
20: x0:SI=x1:SI+x0:SI
21: use x0:SI
which suggests problems deeper in the CSE library.
