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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [LLVM-COV] Wrong coverage with split logical expression"
href="https://bugs.llvm.org/show_bug.cgi?id=49435">49435</a>
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<th>Summary</th>
<td>[LLVM-COV] Wrong coverage with split logical expression
</td>
</tr>
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<th>Product</th>
<td>Runtime Libraries
</td>
</tr>
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<th>Version</th>
<td>11.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>libprofile library
</td>
</tr>
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<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>
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<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
int f(int x){
return -x;
}
int f1(int x,int y){
return x+3-y;
}
int f2(int x,int y){
return x+y;
}
int f3(int x){
return 2*x;
}
int main(){
int a=1,b=0,y;
y = f(b && f1(f3(a),
f2(f3(a),a+2)));
y=(b &&
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
1| 1|int f(int x){
2| 1|return -x;
3| 1|}
4| 0|int f1(int x,int y){
5| 0|return x+3-y;
6| 0|}
7| 0|int f2(int x,int y){
8| 0|return x+y;
9| 0|}
10| 0|int f3(int x){
11| 0|return 2*x;
12| 0|}
13| |
14| 1|int main(){
15| 1|int a=1,b=0,y;
16| 1| y = f(b && f1(f3(a),
17| 0| f2(f3(a),a+2)));
18| 1| y=(b &&
19| 1| 0);
20| 1|
21| 1|}
Its a bit similar to <a class="bz_bug_link
bz_status_NEW "
title="NEW - [LLVM-COV] Split "for" statement has different coverage"
href="show_bug.cgi?id=49430">bug 49430</a>, however I think the coverage of line #17 and
line #19 should be consistent,no matter 0 or 1.</pre>
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