https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71077
Bug ID: 71077 Summary: gcc -lto raises ICE Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: lto Assignee: unassigned at gcc dot gnu.org Reporter: saguryev.gnu at gmail dot com Target Milestone: --- gcc raises ICE as follows starting from rev. 235653 : [# 00000001] {2186}$> ./gcc -O3 -flto -march=core-avx2 O768_r.c [ warnings snipped ] O768_r.c:3:1: warning: return type defaults to 'int' [-Wimplicit-int] main() { ^~~~ O768_r.c: In function 'main': O768_r.c:3:1: internal compiler error: in find_taken_edge_cond_expr, at tree-cfg.c:2235 main() { ^ 0xa9fe03 find_taken_edge_cond_expr ../../..//src/235653/gcc/tree-cfg.c:2235 0xa9fe03 find_taken_edge(basic_block_def*, tree_node*) ../../..//src/235653/gcc/tree-cfg.c:2182 0xc5880c thread_through_normal_block ../../..//src/235653/gcc/tree-ssa-threadedge.c:1077 0xc5a124 thread_across_edge(gcond*, edge_def*, bool, const_and_copies*, avail_exprs_stack*, tree_node* (*)(gimple*, gimple*, avail_exprs_stack*)) ../../..//src/235653/gcc/tree-ssa-threadedge.c:1274 0xce641f identify_jump_threads ../../..//src/235653/gcc/tree-vrp.c:10184 0xce641f vrp_finalize ../../..//src/235653/gcc/tree-vrp.c:10256 0xce641f execute_vrp ../../..//src/235653/gcc/tree-vrp.c:10345 0xce641f execute ../../..//src/235653/gcc/tree-vrp.c:10430 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://gcc.gnu.org/bugs.html> for instructions. lto-wrapper: fatal error: ./gcc returned 1 exit status compilation terminated. /usr/bin/ld: lto-wrapper failed collect2: error: ld returned 1 exit status [# 00000001] {2187}$> cat O768_r.c *a; b, c, d; main() { for (;; b++) { c = 0; for (; c < 32; c++) if (b & 1 << c) a[b + c] = d; } }