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| author | Jakub Jelinek <jakub@redhat.com> | 2021-11-09 15:29:36 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2021-11-09 15:29:36 +0100 |
| commit | 0318df0ae63e47f6b2f30e96205d00dcb3696538 (patch) | |
| tree | 3b1479df24d65d8218a705d4b420097a28d0eb80 | |
| parent | a22d910305a5232694ff48ead37a7f53e46b7202 (diff) | |
| download | gcc-0318df0ae63e47f6b2f30e96205d00dcb3696538.zip gcc-0318df0ae63e47f6b2f30e96205d00dcb3696538.tar.gz gcc-0318df0ae63e47f6b2f30e96205d00dcb3696538.tar.bz2 | |
c++: Fix ICE on complex constant with -frounding-math [PR103114]
The FE uses build_complex which assumes that fold_convert will fold
value to a constant. With -frounding-math that isn't guaranteed though.
So, the patch instead fold_build2s COMPLEX_EXPR, which will result
in build_complex if both arguments are constants, and otherwise
will build COMPLEX_EXPR.
build_zero_cst is an optimization for fold_convert (type, integer_zero_node).
2021-11-09 Jakub Jelinek <jakub@redhat.com>
PR c++/103114
* parser.c (cp_parser_userdef_numeric_literal): Use fold_build2
with COMPLEX_EXPR arg instead of build_complex, use build_zero_cst
instead of fold_convert from integer_zero_node.
* g++.dg/ext/complex10.C: New test.
| -rw-r--r-- | gcc/cp/parser.c | 5 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/ext/complex10.C | 5 |
2 files changed, 7 insertions, 3 deletions
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c index 6061f98..32de97b 100644 --- a/gcc/cp/parser.c +++ b/gcc/cp/parser.c @@ -4804,9 +4804,8 @@ cp_parser_userdef_numeric_literal (cp_parser *parser) else /* if (id_equal (suffix_id, "il")) */ type = long_double_type_node; - value = build_complex (build_complex_type (type), - fold_convert (type, integer_zero_node), - fold_convert (type, value)); + value = fold_build2 (COMPLEX_EXPR, build_complex_type (type), + build_zero_cst (type), fold_convert (type, value)); } if (cp_parser_uncommitted_to_tentative_parse_p (parser)) diff --git a/gcc/testsuite/g++.dg/ext/complex10.C b/gcc/testsuite/g++.dg/ext/complex10.C new file mode 100644 index 0000000..67dfb0c --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/complex10.C @@ -0,0 +1,5 @@ +// PR c++/103114 +// { dg-do compile } +// { dg-options "-frounding-math" } + +_Complex double d = 10.1i; |