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constants should be tagged with unnamed_addr to merge them #5613

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constants should be tagged with unnamed_addr to merge them#5613
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A-frontendArea: Compiler frontend (errors, parsing and HIR)E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.

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@thestinger
thestinger
opened on Mar 29, 2013

LLVM only exposes setUnnamedAddr through the C++ API, sadly.

Marking constants this way allows LLVM to merge the representations, because it informs the compiler that the uniqueness of the address is unimportant.

If you absolutely must have a unique address, it should probably be expressed with an attribute.

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  1. bstrie commented on May 28, 2013

    @bstrie
    bstrie
    on May 28, 2013
    Contributor

    Nominating for Maturity 5, Production Ready.

  2. thestinger commented on May 28, 2013

    @thestinger
    thestinger
    on May 28, 2013
    ContributorAuthor

    We probably can't really do this since the addresses are significant. I'll open more specific issues.

  3. thestinger
    closed this as completedon May 28, 2013

  4. sanxiyn commented on May 31, 2013

    @sanxiyn
    sanxiyn
    on May 31, 2013
    Contributor

    #6787 exposed unnamed_addr, which should help this issue.

  5. thestinger
    reopened this on Aug 9, 2013
  6. thestinger
    closed this as completedon Aug 9, 2013

  7. alexcrichton commented on Aug 9, 2013

    @alexcrichton
    alexcrichton
    on Aug 9, 2013
    Member

    I'm adding an attribute for doing this in #8421

  8. U007D
    added a commit that references this issue on Aug 21, 2026

    Merge rust-lang#5613

    239dd50
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    A-frontendArea: Compiler frontend (errors, parsing and HIR)E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.

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