http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50211
Bug #: 50211 Summary: ICE: verify_flow_info: Incorrect fallthru 11->12 with -funroll-all-loops --param case-values-threshold=1 Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassig...@gcc.gnu.org ReportedBy: zso...@seznam.cz Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Created attachment 25119 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25119 reduced testcase Probably related to PR50200. --param case-values-threshold=1 seems to cause various ICEs. This one has simpler testcase and less compiler flags. Compiler output: $ gcc -O -funroll-all-loops --param case-values-threshold=1 testcase.c testcase.c: In function 'foo': testcase.c:17:1: error: verify_flow_info: Incorrect fallthru 11->12 testcase.c:17:1: error: wrong insn in the fallthru edge (barrier 96 101 105) testcase.c:17:1: internal compiler error: in rtl_verify_flow_info, at cfgrtl.c:2113 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. Tested revisions: r178125 - crash