[llvm-bugs] [Bug 45573] New: Code gen for initial-exec TLS differs from gcc

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45573

            Bug ID: 45573
           Summary: Code gen for initial-exec TLS differs from gcc
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: yshuiv7 at gmail.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org

https://godbolt.org/z/R4p7R2

LLVM uses @TPOFF while gcc uses @GOTTPOFF.

gcc seems to be correct here according to
https://www.akkadia.org/drepper/tls.pdf

I discovered this while trying to build mesa with lld. lld complains about tls
attributes mismatch, which i think is because there is assembly code in mesa
that access the TLS variable with @GOTTPOFF, while llvm generates code that
uses @TPOFF.

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