<div dir="ltr">I thought jumps start short and relaxation widens them as needed until fixpoint. So relax-all causes them all to be widened unconditionally.</div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jun 29, 2016 at 9:27 AM, Reid Kleckner via llvm-dev <span dir="ltr"><<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Wed, Jun 22, 2016 at 9:36 AM, Nirav Davé <span dir="ltr"><<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>In any case, the issue appears to be that llvm doesn't realize that the target address is resolved and erroneously applies branch relaxation to the jump. I don't know why a linker private symbol would make a difference. </div></div></blockquote><div><br></div><div>Relaxation is the process of *shortening* jumps that can be shortened, and then re-running instruction layout to discover more relaxations until fixpoint. Removing the -relax-all flag in clang won't help here, it would hurt.<br></div><div><br></div><div>I'm not exactly sure what the semantics of linker private symbols are, but using a normal assembler temporary label is probably the way to go anyway.</div></div></div></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature">~Craig</div>
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