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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I've had this request from my users as well, but it has never been high enough on the priority list to look at closely.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I think it would be feasible to have the actual ret instruction associated with the closing brace, while the load/computation of the return value would be associated
with the `return` statement; but that's as far as I got when I looked at this before.<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">--paulr<o:p></o:p></span></a></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">P.S. The word "parenthesis" plural "parentheses" refers specifically to these characters: ( )<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Generally [ ] are "square brackets" or sometimes just "brackets" while { } are called "braces" or "curly brackets."<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> llvm-dev [mailto:llvm-dev-bounces@lists.llvm.org]
<b>On Behalf Of </b>Frozen via llvm-dev<br>
<b>Sent:</b> Wednesday, August 02, 2017 11:19 PM<br>
<b>To:</b> llvm-dev@lists.llvm.org<br>
<b>Subject:</b> [llvm-dev] Why LLVM doesn't have debug information of function right parentheses</span><span lang="ZH-CN" style="font-size:10.0pt">？</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Simple Case:<br>
<br>
1.int main()<br>
2.{<br>
3. int i = 0;<br>
4. return 0;<br>
5.}<br>
<br>
compile command: clang -g a.c<br>
<br>
In LLVM IR, we have one attribute named "scopeLine" to indicate the left parentheses. But we don't have one attribute to indicate the right parentheses (line 5 in this example).<br>
<br>
So if we use gdb to debug it:<br>
(gdb) b main<br>
Breakpoint 1 at 0x100005c8: file a.c, line 3.<br>
(gdb) r<br>
Breakpoint 1, main () at a.c:3<br>
3 int i = 0;<br>
Missing separate debuginfos, <br>
(gdb) n<br>
4 return 0;<br>
(gdb) n<br>
0x00003fffb7db4580 in generic_start_main.isra.0<br>
We can not stop at line 5.<br>
<br>
But GCC can stop at line 5<br>
(gdb) b main<br>
Breakpoint 1 at 0x100005e0: file a.c, line 3.<br>
(gdb) r<br>
Breakpoint 1, main () at a.c:3<br>
3 int i = 0;<br>
Missing separate debuginfos<br>
(gdb) n<br>
4 return 0;<br>
(gdb) n<br>
5 }<br>
(gdb)<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
<p> <o:p></o:p></p>
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