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[Bug middle-end/42479] Wrong code with -floop-block
- From: "fxcoudert at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 5 Jan 2010 11:40:53 -0000
- Subject: [Bug middle-end/42479] Wrong code with -floop-block
- References: <bug-42479-12313@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from fxcoudert at gcc dot gnu dot org 2010-01-05 11:40 -------
Also happens at rev. 155544 on x86_64-unknown-linux-gnu, with both -m32 and
-m64. "-O3 -floop-block" gives different results than "-O3" alone (and is much
faster). Profiling should indicate what part of code is different (I tried
diff'ing the optimized tree dumps, but it's too hard with the variable name
changes).
--
fxcoudert at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
GCC build triplet|x86_64-apple-darwin10 |
GCC host triplet|x86_64-apple-darwin10 |
GCC target triplet|x86_64-apple-darwin10 |i386, x86_64
Last reconfirmed|0000-00-00 00:00:00 |2010-01-05 11:40:52
date| |
Summary|Wrong-code for induct.f90 |Wrong code with -floop-block
|with " -O3 -floop-block" |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42479