efriedma added inline comments.
================
Comment at: lib/CodeGen/CGCall.cpp:2756
SourceLocation EndLoc) {
+ if (FI.isNoReturn()) {
+ // Noreturn functions don't return.
----------------
vsk wrote:
> efriedma wrote:
> > Unfortunately, this won't catch cases where the caller has a noreturn
> > marking, but the callee doesn't. Maybe strip the noreturn attribute from
> > the caller, then put the sanitizer check into both the caller and callee?
> If the caller sees a noreturn marking on the call target, inserting a
> 'reached-unreachable' check after the call is UB, and the optimizer throws it
> away. Perhaps you had a different case in mind?
I'm thinking of the case where the caller can't see the callee, like this:
a.c:
void a(void) __attribute((noreturn));
void b(void) { a(); }
b.c:
void a(void) {}
https://reviews.llvm.org/D40698
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