[LLVMbugs] [Bug 15086] Tailcall optimization in PIC mode on x86 uses GOT, making lazy dynamic linking impossible

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=15086

Reid Kleckner <rnk at google.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #18 from Reid Kleckner <rnk at google.com> ---
After some back and forth, we went ahead and disabled most instances of tail
calls through the GOT in r238487. You can still get to it with the two
supported guaranteed TCO mechanisms, -tailcallopt and musttail.

We could surface a flag for people to get back the extra performance, but I'd
rather not take the maintenance burden. If they really want better perf, they
should go 64-bit already.

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