https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88553
Bug ID: 88553 Summary: [9 Regression] ICE: tree check: expected ssa_name, have var_decl in SSA_VAL, at tree-ssa-sccvn.c:461 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/gomp/pr81768-2.c at any optimization level and w/ -fopenmp -ftree-loop-vectorize -fwrapv: % gcc-9.0.0-alpha20181216 -O1 -fopenmp -ftree-loop-vectorize -fwrapv -c gcc/testsuite/gcc.dg/gomp/pr81768-2.c during GIMPLE pass: ifcvt gcc/testsuite/gcc.dg/gomp/pr81768-2.c: In function 'foo._omp_fn.1': gcc/testsuite/gcc.dg/gomp/pr81768-2.c:10:9: internal compiler error: tree check: expected ssa_name, have var_decl in SSA_VAL, at tree-ssa-sccvn.c:462 10 | #pragma omp target parallel for schedule(static, 32) collapse(3) | ^~~ 0x6dd283 tree_check_failed(tree_node const*, char const*, int, char const*, ...) /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.c:9757 0x6bddf3 tree_check(tree_node*, char const*, int, char const*, tree_code) /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree.h:3157 0x6bddf3 SSA_VAL(tree_node*, bool*) /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-sccvn.c:462 0x6bddf3 vuse_ssa_val /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-sccvn.c:480 0x6bddf3 vn_reference_lookup(tree_node*, tree_node*, vn_lookup_kind, vn_reference_s**, bool) /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-sccvn.c:2626 0xeb9301 visit_reference_op_load /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-sccvn.c:3979 0xeb9301 visit_stmt /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-sccvn.c:4397 0xeba68d process_bb /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-sccvn.c:6047 0xebbe1d do_rpo_vn /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-sccvn.c:6654 0xebd008 do_rpo_vn(function*, edge_def*, bitmap_head*) /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-ssa-sccvn.c:6743 0xd7af41 tree_if_conversion(loop*) /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-if-conv.c:3066 0xd7c626 execute /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-if-conv.c:3142 0xd7c626 execute /var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181216/work/gcc-9-20181216/gcc/tree-if-conv.c:3130 It was initially reported in PR85594 comment 2, but that made little sense as it's most likely an unrelated issue manifesting itself at a different level of the compilation pipeline.