[LLVMbugs] [Bug 19846] Non-trivial infinite while loops being optimized away

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed May 28 13:14:18 PDT 2014


Arnold Schwaighofer <aschwaighofer at apple.com> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #3 from Arnold Schwaighofer <aschwaighofer at apple.com> ---
This is a duplicate of PR 17288
(http://llvm.org/bugs/show_bug.cgi?id=17288#c6). I 'fixed' this for < i32 types
by promoting the induction variable.

The proper fix is to test that the backedge taken count is not UINT#MAX and
branch to the scalar loop if it is.

I'll follow up on there.

*** This bug has been marked as a duplicate of bug 17288 ***

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