https://bugs.llvm.org/show_bug.cgi?id=38642
Bug ID: 38642
Summary: [IA][ARM64] literal value out of range for directive
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: ndesaulni...@google.com
CC: echri...@gmail.com, kristof.be...@arm.com,
kristof.be...@gmail.com, llvm-bugs@lists.llvm.org,
oliver.stann...@arm.com, srhi...@google.com
Created attachment 20744
--> https://bugs.llvm.org/attachment.cgi?id=20744&action=edit
test.S
In the Linux kernel
(https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/crypto/aes-modes.S),
there's an assembly instruction:
ldr q8, =0x30000000200000001 /* addends 1,2,3[,0] */
This produces the error: literal value out of range for directive
I'm not sure what the `=` is supposed to do. 0x30000000200000001 is 9B (72b),
so q8 must be a vector register?
$ cat /tmp/test.S
.text
.global _start
_start:
ldr q8, =0x30000000200000001
$ aarch64-linux-gnu-as /tmp/test.S
$ aarch64-linux-gnu-objdump -D a.out
a.out: file format elf64-littleaarch64
Disassembly of section .text:
0000000000000000 <_start>:
0: 9c000088 ldr q8, 10 <_start+0x10>
...
10: 00000001 .word 0x00000001
14: 00000002 .word 0x00000002
18: 00000003 .word 0x00000003
1c: 00000000 .word 0x00000000
$ clang -target aarch64-linux-gnu /tmp/test.S
/tmp/test.S:5:12: error: literal value out of range for directive
ldr q8, =0x30000000200000001
^
I thought that =0x30000000200000001 was maybe an immediate, but changing the
`=` to a `#` produces a `bignum invalid` error in gas, and the same error in
this bug's title in Clang.
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