https://bugs.llvm.org/show_bug.cgi?id=42568
Bug ID: 42568
Summary: Attribute 'noderef' fails to warn in some cases
Product: clang
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: paul_robin...@playstation.sony.com
CC: llvm-bugs@lists.llvm.org, neeil...@live.com,
richard-l...@metafoo.co.uk
C:\TMP>type test.c
struct S {
int x;
};
struct S __attribute__((noderef)) *s;
void bar() {
struct S *p = s; // warned
int *q = &s->x; // not warned
int *r = &(*s).x; // not warned
}
C:\TMP>clang -c test.c
test.c:8:17: warning: casting to dereferenceable pointer removes 'noderef'
attribute [-Wnoderef]
struct S *p = s; // warned
^
1 warning generated.
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