<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Yup, that’s the best option available right now. There’s limited support for adding a source location to the fixups so the diagnostic isn’t completely useless when coming from the assembler. There’s a proposal ongoing about improved diagnostics from the backend that Quentin is working on that will help here when it’s completed.<div><br></div><div>-Jim</div><div><br><div><div>On Dec 3, 2013, at 9:51 AM, David Peixotto <<a href="mailto:dpeixott@codeaurora.org">dpeixott@codeaurora.org</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="EN-US" link="blue" vlink="purple" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="WordSection1" style="page: WordSection1;"><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="color: rgb(31, 73, 125);">Matheus,<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="color: rgb(31, 73, 125);"> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="color: rgb(31, 73, 125);">The ARM backend reports these kinds of errors using FatalError method of MCContext. You can see some examples in ARMAsmBackend.cpp (search for "out of range pc-relative fixup value").<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="color: rgb(31, 73, 125);"> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="color: rgb(31, 73, 125);">-David<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="color: rgb(31, 73, 125);"> </span></div><div style="border-style: none none none solid; border-left-color: blue; border-left-width: 1.5pt; padding: 0in 0in 0in 4pt;"><div><div style="border-style: solid none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; padding: 3pt 0in 0in;"><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">From:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;"><span class="Apple-converted-space"> </span><a href="mailto:llvmdev-bounces@cs.uiuc.edu">llvmdev-bounces@cs.uiuc.edu</a> [<a href="mailto:llvmdev-bounces@cs.uiuc.edu">mailto:llvmdev-bounces@cs.uiuc.edu</a>]<span class="Apple-converted-space"> </span><b>On Behalf Of<span class="Apple-converted-space"> </span></b>Matheus Almeida<br><b>Sent:</b><span class="Apple-converted-space"> </span>Tuesday, December 03, 2013 5:37 AM<br><b>To:</b><span class="Apple-converted-space"> </span><a href="mailto:llvmdev@cs.uiuc.edu">llvmdev@cs.uiuc.edu</a><br><b>Subject:</b><span class="Apple-converted-space"> </span>[LLVMdev] Reporting errors when applying fixups<o:p></o:p></span></div></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-GB">For a target that hasn’t implemented branch relaxation (yet), does anyone know what is the preferred way to report an error if a fixup cannot be applied because, for example, the destination of a branch is out of range?<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-GB">I suppose I could use asserts just like AArch64 is doing but that won’t stop the assembler of emitting a branch to an undesired location in release builds.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-GB">Does anyone see any problem in using report_fatal_error to report errors in the target Asm backend ?<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-GB"> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-GB">Regards,<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-GB">Matheus<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="EN-GB"> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: justify;"><b><span lang="PT" style="font-size: 12pt; font-family: Arial, sans-serif;">Matheus Almeida<o:p></o:p></span></b></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: justify;"><span lang="PT" style="font-size: 10pt; font-family: Arial, sans-serif;">MIPS processor IP<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: justify;"><span lang="EN-GB"><a href="http://www.imgtec.com/" style="color: purple; text-decoration: underline;"><span lang="PT" style="font-size: 10pt; font-family: Arial, sans-serif;">www.imgtec.com</span></a></span><span lang="PT" style="font-size: 10pt; font-family: Arial, sans-serif;"><o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="PT"> </span></div></div></div>_______________________________________________<br>LLVM Developers mailing list<br><a href="mailto:LLVMdev@cs.uiuc.edu">LLVMdev@cs.uiuc.edu</a> <a href="http://llvm.cs.uiuc.edu">http://llvm.cs.uiuc.edu</a><br><a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev</a></div></blockquote></div><br></div></body></html>