[llvm-bugs] [Bug 44017] New: Can't override default max nesting depth for integrated assembly with clang frontend

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=44017

            Bug ID: 44017
           Summary: Can't override default max nesting depth for
                    integrated assembly with clang frontend
           Product: clang
           Version: 9.0
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: renat at idrisov.info
                CC: llvm-bugs at lists.llvm.org, neeilans at live.com,
                    richard-llvm at metafoo.co.uk

Created attachment 22818
  --> https://bugs.llvm.org/attachment.cgi?id=22818&action=edit
Sample program

Hi All,
I can't find a way to override `-asm-macro-max-nesting-depth` with clang.

$ cat bug1.s
.macro  FOO     start, end
        .if     \start <= \end
        nop
        FOO     %(\start+1), \end
        .endif
        .endm

LEAF(__test)
        FOO 1 50

$ clang -x assembler-with-cpp -integrated-as -o bug1.obj bug1.s
...
<instantiation>:3:13: error: macros cannot be nested more than 20 levels deep.
Use -asm-macro-max-nesting-depth to increase this limit.
...

$ clang -x assembler-with-cpp -integrated-as -Xassembler
-asm-macro-max-nesting-depth=100 -o bug1.obj bug1.s 
clang: error: unsupported argument '-asm-macro-max-nesting-depth=100' to option
'Xassembler'

$ clang --version
clang version 9.0.1-+2019110812332108004e858e4ac00-1~exp1~20191108215024.72 
Target: x86_64-pc-linux-gnu


Thanks!

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