[llvm-bugs] [Bug 41825] New: Macro expansion fails with "expected absolute expression"

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=41825

            Bug ID: 41825
           Summary: Macro expansion fails with "expected absolute
                    expression"
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: MC
          Assignee: unassignedbugs at nondot.org
          Reporter: isanbard at gmail.com
                CC: llvm-bugs at lists.llvm.org

This is seen when compiling Linux with the integrated assembler. It was first
seen in AArch64, but isn't specific to that platform.

$ cat bad.s
.macro jump_slot jumptable, index, label
.if (. - \jumptable) != 4 * (\index)
.error "Jump slot index mismatch"
.endif
  b \label
.endm

.text
jumptable:
  jump_slot jumptable, 0, realtime

$ clang -cc1as -triple aarch64-grtev4-linux-gnu -target-cpu generic
-target-feature +neon -mrelocation-model static -o /dev/null bad.s
<instantiation>:1:5: error: expected absolute expression
.if (. - jumptable) != 4 * (0)
    ^
bad.s:10:3: note: while in macro instantiation
  jump_slot jumptable, 0, realtime
  ^
<instantiation>:2:1: error: Jump slot index mismatch
.error "Jump slot index mismatch"
^
bad.s:10:3: note: while in macro instantiation
  jump_slot jumptable, 0, realtime
  ^

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20190510/6f497efd/attachment-0001.html>