https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100281
Bug ID: 100281
Summary: ICE with SImode pointer assignment in C++
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: krebbel at gcc dot gnu.org
Target Milestone: ---
Created attachment 50685
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50685&action=edit
Experimental Fix
typedef void * __attribute__((mode (SI))) __ptr32_t;
void foo(){
unsigned int b = 100;
__ptr32_t a;
a = b;
}
Building with "cc1plus t.cpp" ICEs on s390x:
void foo()
in strip_typedefs, at cp/tree.c:1770
6 | a = b;
| ^
0x156f731 strip_typedefs(tree_node*, bool*, unsigned int)
/home2/andreas/build/../gcc/gcc/cp/tree.c:1770
0x135c827 type_to_string
/home2/andreas/build/../gcc/gcc/cp/error.c:3298
0x136c723 cxx_format_postprocessor::handle(pretty_printer*)
/home2/andreas/build/../gcc/gcc/cp/error.c:4242
0x291f171 pp_format(pretty_printer*, text_info*)
/home2/andreas/build/../gcc/gcc/pretty-print.c:1496
0x28ffecb diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
/home2/andreas/build/../gcc/gcc/diagnostic.c:1244
0x2902cef diagnostic_impl
/home2/andreas/build/../gcc/gcc/diagnostic.c:1406
0x2902cef permerror(rich_location*, char const*, ...)
/home2/andreas/build/../gcc/gcc/diagnostic.c:1688
0x12441f7 convert_like_internal
/home2/andreas/build/../gcc/gcc/cp/call.c:7581
0x12460e1 convert_like
/home2/andreas/build/../gcc/gcc/cp/call.c:8114
0x12463b3 convert_like
/home2/andreas/build/../gcc/gcc/cp/call.c:8126
0x12463b3 perform_implicit_conversion_flags(tree_node*, tree_node*, int, int)
/home2/andreas/build/../gcc/gcc/cp/call.c:12303
0x1599687 cp_build_modify_expr(unsigned int, tree_node*, tree_code, tree_node*,
int)
/home2/andreas/build/../gcc/gcc/cp/typeck.c:8887
0x159b66d build_x_modify_expr(unsigned int, tree_node*, tree_code, tree_node*,
int)
/home2/andreas/build/../gcc/gcc/cp/typeck.c:8978
0x1435d8d cp_parser_assignment_expression
/home2/andreas/build/../gcc/gcc/cp/parser.c:10184
0x1437661 cp_parser_expression
/home2/andreas/build/../gcc/gcc/cp/parser.c:10313
0x143b5c1 cp_parser_expression_statement
/home2/andreas/build/../gcc/gcc/cp/parser.c:12041
0x1449a71 cp_parser_statement
/home2/andreas/build/../gcc/gcc/cp/parser.c:11837
0x144bac7 cp_parser_statement_seq_opt
/home2/andreas/build/../gcc/gcc/cp/parser.c:12189
0x144bbc7 cp_parser_compound_statement
/home2/andreas/build/../gcc/gcc/cp/parser.c:12138
0x146ef03 cp_parser_function_body
/home2/andreas/build/../gcc/gcc/cp/parser.c:24080
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
The problem appears to be triggered by two locations in the front-end where
non-POINTER_SIZE pointers aren't handled right now.
1. An assertion in strip_typedefs is triggered because the alignment of the
types don't match. This in turn is caused by creating the new type with
build_pointer_type instead of taking the type of the original pointer into
account.
2. An assertion in cp_convert_to_pointer is triggered which expects the target
type to always have POINTER_SIZE.
