https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83439
Bug ID: 83439 Summary: [7 Regression] Bootstrap failure with --enable-checking=yes,rtl,extra Product: gcc Version: 7.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap Assignee: unassigned at gcc dot gnu.org Reporter: jakub at gcc dot gnu.org Target Milestone: --- r255688 fails to bootstrap with ../configure --enable-languages=all,ada,obj-c++,lto,go,brig --enable-checking=yes,rtl,extra on both x86_64-linux and i686-linux, the error is: ../../gcc/ipa-icf.c: In static member function ‘static ipa_icf::sem_variable* ipa_icf::sem_variable::parse(varpool_node*, bitmap_obstack*)’: ../../gcc/ipa-icf.c:3697:1: error: stmt (0x7fc209380ea0) marked modified after optimization pass: } ^ # .MEM_29 = VDEF <.MEM_27> ipa_icf::sem_variable::init (_25); ../../gcc/ipa-icf.c:3697:1: internal compiler error: verify_ssa failed 0x15798c2 verify_ssa(bool, bool) ../../gcc/tree-ssa.c:1184 0x10f2420 execute_function_todo ../../gcc/passes.c:1973 0x10f1470 do_per_function ../../gcc/passes.c:1650 0x10f25ae execute_todo ../../gcc/passes.c:2016 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. Makefile:1099: recipe for target 'ipa-icf.o' failed make[3]: *** [ipa-icf.o] Error 1 This is during FRE, so I suspect some of the recent tree-ssa-pre.c backports.