https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88023
Bug ID: 88023 Summary: [9 Regression] ICE: verify_ssa failed (error: definition in block 39 does not dominate use in block 34) Product: gcc Version: 9.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: asolokha at gmx dot com Target Milestone: --- gcc-9.0.0-alpha20181111 snapshot (r266019) ICEs when compiling gcc/testsuite/gcc.c-torture/compile/20150108.c w/ -O1 (-O2, -O3) -ftree-loop-vectorize --param max-loop-header-insns=2: % gcc-9.0.0-alpha20181111 -O1 -ftree-loop-vectorize --param max-loop-header-insns=2 -c gcc/testsuite/gcc.c-torture/compile/20150108.c gcc/testsuite/gcc.c-torture/compile/20150108.c: In function 'fn1': gcc/testsuite/gcc.c-torture/compile/20150108.c:5:5: error: definition in block 39 does not dominate use in block 34 5 | int fn1 () { | ^~~ for SSA_NAME: _107 in statement: s_lsm.23_90 = PHI <_107(34), _107(39)> PHI argument _107 for PHI node s_lsm.23_90 = PHI <_107(34), _107(39)> during GIMPLE pass: vect gcc/testsuite/gcc.c-torture/compile/20150108.c:5:5: internal compiler error: verify_ssa failed 0xeea820 verify_ssa(bool, bool) /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/tree-ssa.c:1188 0xc04add execute_function_todo /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/passes.c:1932 0xc058de execute_todo /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/passes.c:1979