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[Bug rtl-optimization/42691] [4.4/4.5 regression] problematic REG_EQUAL note added to SUBREG
- From: "jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 15 Jan 2010 21:59:03 -0000
- Subject: [Bug rtl-optimization/42691] [4.4/4.5 regression] problematic REG_EQUAL note added to SUBREG
- References: <bug-42691-17567@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #21 from jakub at gcc dot gnu dot org 2010-01-15 21:59 -------
FYI, if you always want to test a NaN, you'd need to use big endian ordering
for some arches, plus there are targets which don't support NaN at all or where
a double isn't as big as 4 shorts.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42691