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[Bug rtl-optimization/60554] redundant instruction is generated for setting the flags on x86
- From: "l_belev at yahoo dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 17 Mar 2014 17:08:53 +0000
- Subject: [Bug rtl-optimization/60554] redundant instruction is generated for setting the flags on x86
- Auto-submitted: auto-generated
- References: <bug-60554-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60554
--- Comment #2 from Luchezar Belev <l_belev at yahoo dot com> ---
sorry, the above code to be correct "setg %al" should be "seta %al" instead.
also in the compiler-generated code, the testl instruction is still redundant,
but when it is removed the following "setg %al" should be replaced with "seta
%al".
Maybe this is too complicated for a compiler to figure out though.