[llvm-bugs] [Bug 27784] New: llc emits AT&T-mnemonic when using -O0 --x86-asm-syntax=intel

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=27784

            Bug ID: 27784
           Summary: llc emits AT&T-mnemonic when using -O0
                    --x86-asm-syntax=intel
           Product: clang
           Version: 3.8
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: thrimbor.github at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 16376
  --> https://llvm.org/bugs/attachment.cgi?id=16376&action=edit
FreeBASIC code triggering the bug, along with LLVM-IR and assembly files.

When using -O0 in combination with --x86-asm-syntax=intel, llc produces
assembly which contains the "movabs"-mnemonic which makes the GNU assembler
fail. Replacing the "movabs" with a normal "mov" seems to resolve the issue.
Also, this doesn't seem to happen when using optimization levels other than
-O0.

The LLVM-IR-code which triggered this behavior was generated by the
FreeBASIC-compiler, sources are attached.

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