https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71602
Bug ID: 71602
Summary: ICE on valid code on x86_64-linux-gnu (in
build_va_arg, at c-family/c-common.c:5810)
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: chengniansun at gmail dot com
Target Milestone: ---
This is a regression. gcc-5.3 and older versions are okay with the following
test program.
$: 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 20160620 (experimental) [trunk revision 237605] (GCC)
$:
$: gcc-trunk -c small.c
small.c: In function ‘fn1’:
small.c:3:3: internal compiler error: in build_va_arg, at
c-family/c-common.c:5810
__builtin_va_arg(pap, double);
^~~~~~~~~~~~~~~~
0x7067a2 build_va_arg(unsigned int, tree_node*, tree_node*)
../../gcc-source-trunk/gcc/c-family/c-common.c:5810
0x6a0d23 c_parser_postfix_expression
../../gcc-source-trunk/gcc/c/c-parser.c:7668
0x6a335a c_parser_unary_expression
../../gcc-source-trunk/gcc/c/c-parser.c:6942
0x6a418a c_parser_cast_expression
../../gcc-source-trunk/gcc/c/c-parser.c:6771
0x6a4394 c_parser_binary_expression
../../gcc-source-trunk/gcc/c/c-parser.c:6580
0x6a5045 c_parser_conditional_expression
../../gcc-source-trunk/gcc/c/c-parser.c:6351
0x6a56c0 c_parser_expr_no_commas
../../gcc-source-trunk/gcc/c/c-parser.c:6268
0x6a5dc2 c_parser_expression
../../gcc-source-trunk/gcc/c/c-parser.c:8464
0x6a6829 c_parser_expression_conv
../../gcc-source-trunk/gcc/c/c-parser.c:8497
0x6bcb28 c_parser_statement_after_labels
../../gcc-source-trunk/gcc/c/c-parser.c:5287
0x6be9cb c_parser_compound_statement_nostart
../../gcc-source-trunk/gcc/c/c-parser.c:4861
0x6bf25e c_parser_compound_statement
../../gcc-source-trunk/gcc/c/c-parser.c:4696
0x6c0487 c_parser_declaration_or_fndef
../../gcc-source-trunk/gcc/c/c-parser.c:2105
0x6c9625 c_parser_external_declaration
../../gcc-source-trunk/gcc/c/c-parser.c:1549
0x6c9eb9 c_parser_translation_unit
../../gcc-source-trunk/gcc/c/c-parser.c:1430
0x6c9eb9 c_parse_file()
../../gcc-source-trunk/gcc/c/c-parser.c:17931
0x72c2b2 c_common_parse_file()
../../gcc-source-trunk/gcc/c-family/c-opts.c:1070
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.
$:
$: gcc-5.3 -c small.c
$:
$: cat small.c
__builtin_va_list *pap;
void fn1() {
__builtin_va_arg(pap, double);
}
$:
