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[Bug optimization/13712] Executable runs 25% slower than when compiled with INTEL compiler
- From: "falk at debian dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 29 Jan 2004 16:48:23 -0000
- Subject: [Bug optimization/13712] Executable runs 25% slower than when compiled with INTEL compiler
- References: <20040116211131.13712.william.crocker@analog.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From falk at debian dot org 2004-01-29 16:48 -------
I've quickly hacked the test case to compile with a C compiler, to compare
gcc against the DEC compiler. I replaced exp(x) with x*x, since exp() is a
libcall and not under the control of the compiler. Then I get on an 800MHz
ev68:
gcc 3.4: 46.18s (-O3 -ffast-math -mcpu=ev67)
DEC C: 30.02s (-O6 -fast)
So there's also something to gain on other platforms...
--
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Ever Confirmed| |1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13712