Using the Polyhedron test suite, I get a slowdown of gas_dyn from 11.62s (2007-04-26, r124174) to 14.70 (since 2007-04-27, r124211).
The same can also be observed at http://www.suse.de/~gcctest/c++bench/polyhedron/ http://www.suse.de/~gcctest/c++bench/polyhedron/polyhedron-summary.txt-gas_dyn-17.png Both systems are x86-64/Linux systems. If you don't have the polyhedron test, you can obtain it from: http://www.polyhedron.com/pb05/polyhedron_benchmark_suite.html The test was run with the parameters: gfortran -march=opteron -ffast-math -funroll-loops -ftree-vectorize -ftree-loop-linear -msse3 -O3 gas_dyn.f90 -- Summary: 25% slowdown in gas_dyn since 2007-04-27 Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: burnus at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31767
