https://bugs.llvm.org/show_bug.cgi?id=50777
Bug ID: 50777
Summary: [LLVM-COV] No coverage with goto and label
Product: Runtime Libraries
Version: 11.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: libprofile library
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
$ 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
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