https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77988
Bug ID: 77988 Summary: ICE on valid code at -Os and above on x86_64-linux-gnu: verify_gimple failed Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: su at cs dot ucdavis.edu Target Milestone: --- It is a regression from 6.2.x. $ gcc-trunk -v Using built-in specs. COLLECT_GCC=gcc-trunk COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto --prefix=/usr/local/gcc-trunk --disable-bootstrap Thread model: posix gcc version 7.0.0 20161013 (experimental) [trunk revision 241143] (GCC) $ $ gcc-trunk -O1 small.c $ gcc-6.2 -Os small.c $ $ gcc-trunk -Os small.c small.c: In function ‘main’: small.c:4:5: error: invalid address operand in MEM_REF int main () ^~~~ b[0]; small.c:4:5: error: invalid first operand of MEM_REF &b[0] small.c:15:11: note: in statement if (*f) ^~ # VUSE <.MEM_9(D)> _2 = b[0]; small.c:4:5: internal compiler error: verify_gimple failed int main () ^~~~ 0xc31eff verify_gimple_in_cfg(function*, bool) ../../gcc-source-trunk/gcc/tree-cfg.c:5208 0xb12492 execute_function_todo ../../gcc-source-trunk/gcc/passes.c:1965 0xb12e49 execute_todo ../../gcc-source-trunk/gcc/passes.c:2015 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://gcc.gnu.org/bugs.html> for instructions. $ ---------------------------------- static int a = 2; int b[1], c, d; int main () { int e = a, *f = &b[0]; if (d) for (e = 0; e < 1; e++) ; if (e) { L1: if (b < f) __builtin_abort (); if (*f) c++; return 0; } f = 0; goto L1; return 0; }