[llvm-bugs] [Bug 45788] New: missing .nops directive

via llvm-bugs llvm-bugs at lists.llvm.org
Sun May 3 16:31:16 PDT 2020


https://bugs.llvm.org/show_bug.cgi?id=45788

            Bug ID: 45788
           Summary: missing .nops directive
           Product: libraries
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: MC
          Assignee: unassignedbugs at nondot.org
          Reporter: roland at hack.frob.com
                CC: llvm-bugs at lists.llvm.org

The GNU assembler supports `.nops N [, MAX]` to emit nop instructions totalling
N bytes, which is a nontrivial selection for optimal variable-length nop on
x86.
The LLVM assembler doesn't recognize this.

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