diff options
| -rw-r--r-- | gcc/fold-const.c | 1 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/cpp2a/bit-cast7.C | 39 |
2 files changed, 40 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 1241b13..81467f1 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -8256,6 +8256,7 @@ native_encode_initializer (tree init, unsigned char *ptr, int len, { cnt--; field = fld; + pos = int_byte_position (field); val = build_zero_cst (TREE_TYPE (fld)); if (TREE_CODE (val) == CONSTRUCTOR) to_free = val; diff --git a/gcc/testsuite/g++.dg/cpp2a/bit-cast7.C b/gcc/testsuite/g++.dg/cpp2a/bit-cast7.C new file mode 100644 index 0000000..4a3c682 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp2a/bit-cast7.C @@ -0,0 +1,39 @@ +// PR c++/98193 +// { dg-do compile { target c++20 } } + +template <typename To, typename From> +constexpr To +bit_cast (const From &from) +{ + return __builtin_bit_cast (To, from); +} + +struct J +{ + long int a, b : 11, h; +}; + +struct K +{ + long int a, b : 11, c; + constexpr bool operator == (const K &x) + { + return a == x.a && b == x.b && c == x.c; + } +}; + +struct L +{ + long long int a, b : 11, h; +}; +struct M +{ + long long int a, b : 11, c; + constexpr bool operator == (const M &x) + { + return a == x.a && b == x.b && c == x.c; + } +}; + +static_assert (bit_cast <K> (J{}) == K{}, ""); +static_assert (bit_cast <M> (L{0x0feedbacdeadbeefLL}) == M{0x0feedbacdeadbeefLL}, ""); |