https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121391
Bug ID: 121391
Summary: hard-reg constraints: ICE for undeclared variable
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: gjl at gcc dot gnu.org
Target Milestone: ---
The following test terminates with an ICE after the correct error message:
int use_hrc (void)
{
__asm volatile ("" :: "{eax}" (var));
}
gcc use-hrc.c -S
use-hrc.c: In function ‘use_hrc’:
use-hrc.c:3:36: error: ‘var’ undeclared (first use in this function)
3 | __asm volatile ("" :: "{eax}" (var));
| ^~~
use-hrc.c:3:36: note: each undeclared identifier is reported only once for each
function it appears in
use-hrc.c:3:5: internal compiler error: tree check: expected class ‘type’, have
‘exceptional’ (error_mark) in test, at gimplify_reg_info.h:48
3 | __asm volatile ("" :: "{eax}" (var));
| ^~~~~
0x2445d11 internal_error(char const*, ...)
../../../source/gcc-master/gcc/diagnostic-global-context.cc:534
0x8b67f6 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
../../../source/gcc-master/gcc/tree.cc:9211
0x83d0d0 tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
../../../source/gcc-master/gcc/tree.h:3878
0x83d0d0 gimplify_reg_info::test(HARD_REG_SET const&, int) const
../../../source/gcc-master/gcc/gimplify_reg_info.h:48
0x83d0d0 gimplify_reg_info::test_alt_input(unsigned int, int) const
../../../source/gcc-master/gcc/gimplify_reg_info.h:121
0x83d0d0 parse_input_constraint(char const**, int, int, int, int, char const*
const*, bool*, bool*, gimplify_reg_info*)
../../../source/gcc-master/gcc/stmt.cc:620
0xde3cfd gimplify_asm_expr
../../../source/gcc-master/gcc/gimplify.cc:8161
0xdceab6 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../../source/gcc-master/gcc/gimplify.cc:20226
0xdcfba6 gimplify_stmt(tree_node**, gimple**)
../../../source/gcc-master/gcc/gimplify.cc:8572
0xdd0c97 gimplify_bind_expr
../../../source/gcc-master/gcc/gimplify.cc:1687
0xdcdc73 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../../source/gcc-master/gcc/gimplify.cc:20094
0xdf2087 gimplify_stmt(tree_node**, gimple**)
../../../source/gcc-master/gcc/gimplify.cc:8572
0xdf2087 gimplify_body(tree_node*, bool)
../../../source/gcc-master/gcc/gimplify.cc:21200
0xdf2565 gimplify_function_tree(tree_node*)
../../../source/gcc-master/gcc/gimplify.cc:21409
0xbbcc47 cgraph_node::analyze()
../../../source/gcc-master/gcc/cgraphunit.cc:689
0xbbf847 analyze_functions
../../../source/gcc-master/gcc/cgraphunit.cc:1265
0xbc07dd symbol_table::finalize_compilation_unit()
../../../source/gcc-master/gcc/cgraphunit.cc:2575
