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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 - [LLVM-COV] No coverage with goto and label"
href="https://bugs.llvm.org/show_bug.cgi?id=50777">50777</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[LLVM-COV] No coverage with goto and label
</td>
</tr>
<tr>
<th>Product</th>
<td>Runtime Libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>11.0
</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>libprofile library
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>cnwy1996@outlook.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>$ clang -v
clang version 11.0.0
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/wangyang/llvm-project/build/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Candidate multilib: .;@m64
Selected multilib: .;@m64
$ cat test.c
#include <stdlib.h>
#include<stdio.h>
short a = 65531;
int b = 3, f;
signed char c, d;
static void fn1(int p1) {
short e;
b = f;
if (f > p1 && p1)
L:
for (printf("Executed!\n"); 0;)
;
else if (d)
b = 0 >= b;
for (; e <= 3; e++) {
if (b)
continue;
b = 3;
goto L;
}
}
int main() {
for (; c >= 0; c--) {
fn1(a);
}
return 0;
}
$ clang -w -O0 -g -fcoverage-mapping -fprofile-instr-generate=test.profraw
test.c; ./a.out; llvm-profdata merge test.profraw -o test.profdata; llvm-cov
show a.out -instr-profile=test.profdata test.c > test.lcov; cat test.lcov
Executed!
Executed!
1| |#include <stdlib.h>
2| |#include<stdio.h>
3| |
4| |short a = 65531;
5| |int b = 3, f;
6| |signed char c, d;
7| 1|static void fn1(int p1) {
8| 1| short e;
9| 1| b = f;
10| 1| if (f > p1 && p1)
11| 3| L:
12| 3| for (printf("Executed!\n"); 0;)
13| 0| ;
14| 0| else if (d)
15| 0| b = 0 >= b;
16| 6| for (; e <= 3; e++) {
17| 5| if (b)
18| 4| continue;
19| 1| b = 3;
20| 1| goto L;
21| 1| }
22| 2|}
23| |
24| 1|int main() {
25| 2| for (; c >= 0; c--) {
26| 1| fn1(a);
27| 1| }
28| 1| return 0;
29| 1|}
Line 11 and 12 should only be executed 2 twice</pre>
</div>
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