When I compile ace542 with the actual snapshot of gcc41 I get an ICE when I use -O3 -fpeel-loops.
The ICE occurs first with snapshot gcc-4.1-20050611, snapshot gcc-4.1-20050604 works. Michael Cieslinski g++41f -O3 -fpeel-loops -c -o Priority_Task_Test.o Priority_Task_Test.ii Priority_Task_Test.cpp: In function 'int run_main(int, ACE_TCHAR**)': Priority_Task_Test.cpp:251: error: insn does not satisfy its constraints: (insn:TI 1712 1071 1713 (set (reg:DI 0 ax [orig:66 D.31900 ] [66]) (mult:DI (reg:DI 7 sp [orig:67 ivtmp.1037 ] [67]) (const_int 2 [0x2]))) 194 {*lea_2_rex64} (nil) (nil)) Priority_Task_Test.cpp:251: internal compiler error: in extract_constrain_insn_cached, at recog.c:2002 Please submit a full bug report, with preprocessed source if appropriate. g++41f -v Using built-in specs. Target: x86_64-unknown-linux-gnu Configured with: ../gcc-4.1-20050709/configure --prefix=/usr/local/gcc41f --program-suffix=41f --with-arch=opteron --enable-languages=c,c++ --enable-checking Thread model: posix gcc version 4.1.0 20050709 (experimental) -- Summary: ICE in extract_constrain_insn_cached, at recog.c:2000 with -O3 -fpeel-loops Product: gcc Version: 4.1.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: tree-optimization AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: micis at gmx dot de CC: gcc-bugs at gcc dot gnu dot org GCC build triplet: x86_64-unknown-linux-gnu GCC host triplet: x86_64-unknown-linux-gnu GCC target triplet: x86_64-unknown-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22481