https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78644
Bug ID: 78644 Summary: [7 Regression] ICE: SIGSEGV in is_gimple_reg_type with -Og -fipa-cp Product: gcc Version: 7.0 Status: UNCONFIRMED Keywords: ice-checking, ice-on-valid-code Severity: normal Priority: P3 Component: ipa Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Build: x86_64-pc-linux-gnu Created attachment 40224 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40224&action=edit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-gcc -Og -fipa-cp testcase.c -Wno-psabi -wrapper valgrind,-q ==13237== Invalid read of size 2 ==13237== at 0x99A789: is_gimple_reg_type (gimple-expr.h:75) ==13237== by 0x99A789: is_gimple_val(tree_node*) (gimple-expr.c:781) ==13237== by 0xCE310B: verify_gimple_assign_binary (tree-cfg.c:3797) ==13237== by 0xCE310B: verify_gimple_assign (tree-cfg.c:4477) ==13237== by 0xCE310B: verify_gimple_stmt(gimple*) (tree-cfg.c:4731) ==13237== by 0xCF56E4: verify_gimple_in_cfg(function*, bool) (tree-cfg.c:5192) ==13237== by 0xB95092: execute_function_todo(function*, void*) (passes.c:1965) ==13237== by 0xB95A49: execute_todo(unsigned int) (passes.c:2015) ==13237== by 0xB9853D: execute_one_pass(opt_pass*) (passes.c:2410) ==13237== by 0xB98917: execute_pass_list_1(opt_pass*) (passes.c:2459) ==13237== by 0xB98929: execute_pass_list_1(opt_pass*) (passes.c:2460) ==13237== by 0xB98974: execute_pass_list(function*, opt_pass*) (passes.c:2470) ==13237== by 0x81AE63: cgraph_node::expand() (cgraphunit.c:2001) ==13237== by 0x81C747: expand_all_functions (cgraphunit.c:2137) ==13237== by 0x81C747: symbol_table::compile() (cgraphunit.c:2494) ==13237== by 0x81E995: symbol_table::finalize_compilation_unit() (cgraphunit.c:2584) ==13237== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==13237== testcase.c: In function 'bar.constprop': testcase.c:7:1: internal compiler error: Segmentation fault bar (u128 x2, u128 x3) ^~~ Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. $ x86_64-pc-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-243165-checking-yes-rtl-df-extra-nobootstrap-nographite-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra --disable-bootstrap --without-cloog --without-ppl --without-isl --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld --with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-243165-checking-yes-rtl-df-extra-nobootstrap-nographite-amd64 Thread model: posix gcc version 7.0.0 20161202 (experimental) (GCC) Some checking is probably needed in order to have verify_gimple_in_cfg() called.