https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87977
Bug ID: 87977 Summary: [9 Regression] ICE: verify_ssa failed (error: definition in block 4 follows the use) 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.dg/recip_sqrt_mult_3.c w/ -g -O1 (-O2, -O3, -Ofast, -Os) -funsafe-math-optimizations: % gcc-9.0.0-alpha20181111 -g -O1 -funsafe-math-optimizations -c gcc/testsuite/gcc.dg/recip_sqrt_mult_3.c gcc/testsuite/gcc.dg/recip_sqrt_mult_3.c: In function 'foo': gcc/testsuite/gcc.dg/recip_sqrt_mult_3.c:5:1: error: definition in block 4 follows the use 5 | foo (double a) | ^~~ for SSA_NAME: tmp_5 in statement: # DEBUG tmp => tmp_5 during GIMPLE pass: recip gcc/testsuite/gcc.dg/recip_sqrt_mult_3.c:5:1: internal compiler error: verify_ssa failed 0xeea763 verify_ssa(bool, bool) /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/tree-ssa.c:1188 0xc04e8d execute_function_todo /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/passes.c:1932 0xc05c8e execute_todo /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/passes.c:1979