https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71206
Bug ID: 71206 Summary: ICE on valid code at all optimization levels in both 32-bit and 64-bit modes on x86_64-linux-gnu. (verify_gimple failed) Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: chengniansun at gmail dot com Target Milestone: --- The following code crashes the trunk at all optimization levels in both 32-bit and 64-bit modes on x86_64-linux-gnu. $: 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 20160519 (experimental) [trunk revision 236439] (GCC) $: $: gcc-trunk -O0 small.c small.c: In function ‘fn1’: small.c:4:6: error: type mismatch in binary expression void fn1() { fn1(b ^ (2 || c) ^ ((a || 3) ^ d)); } ^~~ unsigned int unsigned int int _3 = b.0_1 ^ d.1_2; small.c:4:6: internal compiler error: verify_gimple failed 0xbdf79d verify_gimple_in_seq(gimple*) ../../gcc-source-trunk/gcc/tree-cfg.c:4833 0x950c71 gimplify_body(tree_node*, bool) ../../gcc-source-trunk/gcc/gimplify.c:11548 0x9510a6 gimplify_function_tree(tree_node*) ../../gcc-source-trunk/gcc/gimplify.c:11636 0x7b62f7 cgraph_node::analyze() ../../gcc-source-trunk/gcc/cgraphunit.c:625 0x7b951b analyze_functions ../../gcc-source-trunk/gcc/cgraphunit.c:1086 0x7ba09c symbol_table::finalize_compilation_unit() ../../gcc-source-trunk/gcc/cgraphunit.c:2543 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. $: $: cat small.c char a; unsigned b; int c, d; void fn1() { fn1(b ^ (2 || c) ^ ((a || 3) ^ d)); } int main() {}