[llvm-bugs] [Bug 45248] New: arch/arm/kernel/sleep.S:149:20: error: invalid reassignment of non-absolute variable 'up_b_offset' in '.equ' directive

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https://bugs.llvm.org/show_bug.cgi?id=45248

            Bug ID: 45248
           Summary: arch/arm/kernel/sleep.S:149:20: error: invalid
                    reassignment of non-absolute variable 'up_b_offset' in
                    '.equ' directive
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: MC
          Assignee: unassignedbugs at nondot.org
          Reporter: caij2003 at gmail.com
                CC: llvm-bugs at lists.llvm.org

Building arch/arm/kernel/sleep.S in linux kernel for ARM with integrated
assembler ended up with the following assertion failure:

arch/arm/kernel/sleep.S:149:20: error: invalid reassignment of non-absolute
variable 'up_b_offset' in '.equ' directive
.equ up_b_offset, 1f - 9998b ; .pushsection ".alt.smp.init", "a" ; .long 9998b
; b . + up_b_offset ; .popsection


I was able to reduce the code to as follows, using X86 assembly,


$ cat repro.s
0:
.equ x, 1f - 0b ;
jmp . + x ;
1:


$ llvm-mc -triple i386 repro.s -filetype=obj -o /dev/null

repro.s:5:9: error: invalid reassignment of non-absolute variable 'x' in '.equ'
directive
.equ x, 0xff ;

$ gcc -c repro.s
$ echo $?
0

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