https://bugs.llvm.org/show_bug.cgi?id=45300
Bug ID: 45300
Summary: llvm-cov: Regression: switch-case often leads to
uncoverable regions
Product: new-bugs
Version: 10.0
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: dennis.fels...@sap.com
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org
$ cat x.cpp
#include <iostream>
void f(int argc)
{
switch (argc) {
case 1: {
std::cout << "1" << std::endl;
return;
}
}
}
int main(int argc, char** /*argv*/)
{
f(argc);
f(argc+1);
}
$ clang++ --version
clang version 10.0.0
Target: x86_64-unknown-linux-gnu
Thread model: posix
$ clang++ -fprofile-instr-generate -fcoverage-mapping x.cpp -o x
$ ./x
1
$ llvm-profdata merge default.profraw -o default.profdata
$ llvm-cov show ./x -instr-profile=default.profdata
1| |#include <iostream>
2| |
3| |void f(int argc)
4| 2|{
5| 2| switch (argc) {
6| 1| case 1: {
7| 1| std::cout << "1" << std::endl;
8| 1| return;
9| 0| }
10| 2| }
11| 2|}
12| |
13| |int main(int argc, char** /*argv*/)
14| 1|{
15| 1| f(argc);
16| 1| f(argc+1);
17| 1|}
Note that line 9 is uncovered and impossible to cover.
With LLVM 9.0.0 this worked fine:
1| |#include <iostream>
2| |
3| |void f(int argc)
4| 2|{
5| 2| switch (argc) {
6| 2| case 1: {
7| 1| std::cout << "1" << std::endl;
8| 1| return;
9| 2| }
10| 2| }
11| 2|}
12| |
13| |int main(int argc, char** /*argv*/)
14| 1|{
15| 1| f(argc);
16| 1| f(argc+1);
17| 1|}
Best regards
Dennis
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
