https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70633
Bug ID: 70633 Summary: ICE on valid code at -Os (in 32-bit mode) on x86_64-linux-gnu: output_operand: invalid expression as operand Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: su at cs dot ucdavis.edu Target Milestone: --- The following code causes an ICE when compiled with the current GCC trunk (and 5.x) at -Os on x86_64-linux-gnu in the 32-bit mode. This is a regression from 4.9.x. $ 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/6.0.0/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 6.0.0 20160411 (experimental) [trunk revision 234874] (GCC) $ $ gcc-trunk -m32 -O0 small.c $ gcc-4.9 -m32 -Os small.c $ $ gcc-trunk -m32 -Os small.c small.c: In function ‘main’: small.c:10:1: internal compiler error: output_operand: invalid expression as operand } ^ 0x8610c3 output_operand_lossage(char const*, ...) ../../gcc-source-trunk/gcc/final.c:3409 0x861a0d output_addr_const(_IO_FILE*, rtx_def*) ../../gcc-source-trunk/gcc/final.c:3998 0xe5291e assemble_integer_with_op(char const*, rtx_def*) ../../gcc-source-trunk/gcc/varasm.c:2668 0xe52975 default_assemble_integer(rtx_def*, unsigned int, int) ../../gcc-source-trunk/gcc/varasm.c:2684 0xe529fa assemble_integer(rtx_def*, unsigned int, unsigned int, int) ../../gcc-source-trunk/gcc/varasm.c:2700 0xe59339 output_constant ../../gcc-source-trunk/gcc/varasm.c:4749 0xe5b3ed output_constant ../../gcc-source-trunk/gcc/varasm.c:5003 0xe5b3ed output_constructor_regular_field ../../gcc-source-trunk/gcc/varasm.c:5006 0xe5b3ed output_constructor ../../gcc-source-trunk/gcc/varasm.c:5276 0xe59be0 assemble_constant_contents ../../gcc-source-trunk/gcc/varasm.c:3381 0xe624e4 output_constant_def_contents ../../gcc-source-trunk/gcc/varasm.c:3426 0xe62768 mark_constants_in_pattern ../../gcc-source-trunk/gcc/varasm.c:3951 0xe628db mark_constants ../../gcc-source-trunk/gcc/varasm.c:3983 0xe628db mark_constant_pool ../../gcc-source-trunk/gcc/varasm.c:3999 0xe628db output_constant_pool ../../gcc-source-trunk/gcc/varasm.c:4040 0xe628db assemble_start_function(tree_node*, char const*) ../../gcc-source-trunk/gcc/varasm.c:1726 0x864909 rest_of_handle_final ../../gcc-source-trunk/gcc/final.c:4439 0x864909 execute ../../gcc-source-trunk/gcc/final.c:4516 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. $ ------------------------------------------------------------ int a; int main () { int __attribute__ ((vector_size (4 * sizeof (int)))) b = { (int) main, 0, 0, 0 }; if (&b + a) __builtin_abort (); return 0; }