https://sourceware.org/bugzilla/show_bug.cgi?id=23193
Bug ID: 23193
Summary: aarch64: orr should not be converted to alias mov when
non-zero shift
Product: binutils
Version: 2.30
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: i-bugzilla-sourceware-org-kasujfzh at rf dot risimo.net
Target Milestone: ---
$ hexdump bin2
0000000 ee f3 9e aa
0000004
$ objdump -D -b binary -maarch64 -Mno-aliases bin2
bin2: file format binary
Disassembly of section .data:
0000000000000000 <.data>:
0: aa9ef3ee orr x14, xzr, x30, asr #60
$ objdump -D -b binary -maarch64 bin2
bin2: file format binary
Disassembly of section .data:
0000000000000000 <.data>:
0: aa9ef3ee mov x14, x30, asr #60
$
The condition for the alias is
shift == '00' && imm6 == '000000' && Rn == '11111'
here imm6 (the shift amount) is clearly not all zeros
and therefore the output of no-aliases and aliases should be the
same (the orr variant).
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