https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99779
Bug ID: 99779
Summary: [GCC-10.1.0]A bug when assign to a pointer by function
which process the pointer inside.
Product: gcc
Version: 10.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: xin....@compiler-dev.com
Target Milestone: ---
As shown in the following testcase：
int helloa = 12;
int hellob = 13;
int *fp=&helloa;
int __attribute__((noinline)) foo()
{
fp=&hellob;
return 15;
}
int main()
{
*fp = foo();
printf("helloa=%d,hellob=%d\n",helloa,hellob);
}
compile with gcc-10.1.0 and any optimization, the result is
helloa=15,hellob=13
but with clang-10.0.1, the result is
helloa=12,hellob=15
According to this testcase, in my opinion ,the clang's result is right.
gcc do not process it correctly.
