[llvm] r255175 - [X86] Enable shrink-wrapping by default, but keep it disabled for stack frames

[Joerg Sonnenberger via llvm-commits]

On Wed, Dec 23, 2015 at 12:38:32AM +0100, Joerg Sonnenberger via llvm-commits wrote:
> On Wed, Dec 09, 2015 at 11:08:19PM -0000, Quentin Colombet via llvm-commits wrote:
> > Author: qcolombet
> > Date: Wed Dec  9 17:08:18 2015
> > New Revision: 255175
> > 
> > URL: http://llvm.org/viewvc/llvm-project?rev=255175&view=rev
> > Log:
> > [X86] Enable shrink-wrapping by default, but keep it disabled for stack frames
> > without a frame pointer when unwind may happen.
> > This is a workaround for a bug in the way we emit the CFI directives for
> > frameless unwind information. See PR25614.
> 
> This hangs when compiling the attached input with -O2.

Post-holiday ping.

Joerg