http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42145
Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
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CC| |law at redhat dot com
--- Comment #5 from Jeffrey A. Law <law at redhat dot com> ---
-Os disables jump threading except for very specific circumstances because the
block duplication generally increases code size. As a result of restricting
the optimizer, certain paths through the CFG which are unexecutable have to be
left in the CFG which leads to the false positive.
