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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Wrong line hit counts for a single-line function"
href="https://bugs.llvm.org/show_bug.cgi?id=38065">38065</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Wrong line hit counts for a single-line function
</td>
</tr>
<tr>
<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mcastelluccio@mozilla.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20522" name="attach_20522" title="Archive with GCNO, GCDA, source file and GCOV output">attachment 20522</a> <a href="attachment.cgi?id=20522&action=edit" title="Archive with GCNO, GCDA, source file and GCOV output">[details]</a></span>
Archive with GCNO, GCDA, source file and GCOV output
clang --coverage -fno-exceptions -O0 main.c
./a.out
llvm-cov gcov main.gcda
The result is:
-: 0:Source:main.c
-: 0:Graph:main.gcno
-: 0:Data:main.gcda
-: 0:Runs:1
-: 0:Programs:1
3: 1:void f(int K) { if (K) {} }
-: 2:
-: 3:int main(void)
-: 4:{
1: 5: f(5);
-: 6:
1: 7: return 0;
-: 8:}
Or with llvm-cov gcov -a -b -c main.gcda:
-: 0:Source:main.c
-: 0:Graph:main.gcno
-: 0:Data:main.gcda
-: 0:Runs:1
-: 0:Programs:1
function f called 1 returned 100% blocks executed 100%
1: 1:void f(int K) { if (K) {} }
1: 1-block 0
branch 0 taken 1
branch 1 taken 0
1: 1-block 1
1: 1-block 2
-: 2:
function main called 1 returned 100% blocks executed 100%
-: 3:int main(void)
-: 4:{
1: 5: f(5);
-: 6:
1: 7: return 0;
1: 7-block 0
-: 8:}
Clearly, f is only called once, so the count should be 1 and not 3.</pre>
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