[llvm-bugs] [Bug 37219] New: Warn when movq is used with a 64bit immediate

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=37219

            Bug ID: 37219
           Summary: Warn when movq is used with a 64bit immediate
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: joerg at NetBSD.org
                CC: llvm-bugs at lists.llvm.org

GNU as has a misfeature where "movq UINT64_MAX, %rax" is silently translated
into movabs for literal 64bit values. I do not want to support that, but we
should warn for the truncation here.

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