Commit Graph

2 Commits

Author SHA1 Message Date
Akira Hatanaka 7828b1e604 Add support for function attribute 'disable_tail_calls'.
The ``disable_tail_calls`` attribute instructs the backend to not
perform tail call optimization inside the marked function.

For example, 

int callee(int);

int foo(int a) __attribute__((disable_tail_calls)) {
  return callee(a); // This call is not tail-call optimized.
}

Note that this attribute is different from 'not_tail_called', which
prevents tail-call optimization to the marked function.

rdar://problem/8973573

Differential Revision: http://reviews.llvm.org/D12547

llvm-svn: 252986
2015-11-13 00:42:21 +00:00
Akira Hatanaka 262a4c4ec0 Attach attribute "disable-tail-calls" to the functions in the IR.
This commit adds back the code that seems to have been dropped unintentionally
in r176985.

rdar://problem/13752163

Differential Revision: http://reviews.llvm.org/D10100

llvm-svn: 239426
2015-06-09 19:04:36 +00:00