https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97913
Bug ID: 97913
Summary: -fno-delete-null-pointer-checks not working properly
with constexpr
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mfarazma.ext at gmail dot com
Target Milestone: ---
Compiling this code:
```
constexpr int test(const int *arr) {
if(arr == 0){
//
}
return 5;
}
int main(){
static constexpr int arr[] = {1,2,3};
static constexpr int b = test(arr);
return 0;
}
```
With "g++ -fno-delete-null-pointer-check test.cc" generates this error:
error '(((const int*)(& arr)) == 0u)' is not a constant expression.
Seems like an odd behaviour as clang++ is able to compile this successfully.
I have tested it on gcc 6, 7, 9 as well has "HEAD 11.0.0".
