https://bugs.llvm.org/show_bug.cgi?id=48818
Bug ID: 48818
Summary: llvm-cov: wrong coverage for multiple calling a
function with conditional operator statement
Product: Runtime Libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: libprofile library
Assignee: unassignedb...@nondot.org
Reporter: yangyib...@nju.edu.cn
CC: llvm-bugs@lists.llvm.org
Consider this case:
...
$ cat small.c
int f(int i)
{
int r = (i-1) > 0 ? i : 0;
return r;
}
int main()
{
f(1);
f(2);
}
...
$ clang -O0 -w -fcoverage-mapping -fprofile-instr-generate=small.profraw
small.c; ./a.out; llvm-profdata merge small.profraw -o small.profdata; llvm-cov
show a.out -instr-profile=small.profdata small.c > small.c.lcov; cat
small.c.lcov
1| |int f(int i)
2| 2|{
3| 1| int r = (i-1) > 0 ? i : 0;
4| 2| return r;
5| 2|}
6| |
7| |int main()
8| 1|{
9| 1| f(1);
10| 1| f(2);
11| 1|}
12| |
...
We can found that Line #3 is wrongly marked as execute 1 times. Line #3 should
be executed 2 times.
...
$ clang --version
Ubuntu clang version
12.0.0-++20210117052627+ed396212da41-1~exp1~20210117163329.287
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
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