Date: Mon, 7 Sep 2020 14:09:02 -0400 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: riscv32 v2 On Mon, Sep 07, 2020 at 07:27:37AM -0400, Stefan O'Rear wrote: > On Fri, Sep 4, 2020, at 1:48 AM, Stefan O'Rear wrote: > > Rich Felker's suggestion (on IRC) to use a 0-instruction __get_tp was > > NOT implemented after discovering that it generates dramatically worse > > code on clang and cannot easily be conditionalized. Bug reports to come. > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96952 > https://bugs.llvm.org/show_bug.cgi?id=47447 Thanks! I think the GCC issue & response to it supports my preference not to use GCC __builtin_*, but I would like to see them fix it. The form with __asm__("" : ...) is semantically correct and has always worked, but I don't see enough benefit over the current non-empty asm to justify accepting the worse codegen from llvm getting it wrong. Maybe we can change it at some point in the future after llvm is fixed, but it's really no big deal. Rich
Powered by blists - more mailing lists
Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.