https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95576
Bug ID: 95576 Summary: [11 Regression] -fcompare-debug failure with -O3 -fno-tree-forwprop -fvect-cost-model=unlimited Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: debug Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz CC: aoliva at gcc dot gnu.org Target Milestone: --- Host: x86_64-pc-linux-gnu Created attachment 48703 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48703&action=edit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-g++ -O3 -fno-tree-forwprop -fvect-cost-model=unlimited -fcompare-debug testcase.C x86_64-pc-linux-gnu-g++: error: testcase.C: '-fcompare-debug' failure $ diff -u *gkd --- a-testcase.C.gkd 2020-06-08 13:05:48.719739159 +0200 +++ a-testcase.gk.C.gkd 2020-06-08 13:05:48.839739158 +0200 @@ -191,9 +191,9 @@ 3: struct S * s; 4: int f; 5: void * d; -1: int (*) () * _vptr.S; -2: static int (*) () _ZTV1S[5] = <<< omitted >>>; -0: struct S D.xxxx; +2: int (*) () * _vptr.S; +0: static int (*) () _ZTV1S[5] = <<< omitted >>>; +1: struct S D.xxxx; ;; Function T::~T (_ZN1TD0Ev, funcdef_no=8, cgraph_uid=9, symbol_order=9) $ x86_64-pc-linux-gnu-g++ -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest/bin/x86_64-pc-linux-gnu-g++ COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r11-1029-20200608001623-g53d461e4e0f-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra --with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld --with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-r11-1029-20200608001623-g53d461e4e0f-checking-yes-rtl-df-extra-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 11.0.0 20200608 (experimental) (GCC)