https://gcc.gnu.org/g:4edd2957ad32c4dabb05dbd175ff2067d0bfe072
commit r16-7940-g4edd2957ad32c4dabb05dbd175ff2067d0bfe072 Author: Martin Uecker <[email protected]> Date: Thu Feb 19 18:20:01 2026 +0100 c: Fix ICE related to tags and hardbool attribute [PR123856] The hardbool attribute creates special enumeration types, but the tag is not set correctly, which causes broken diagnostics and an ICE with the new helper function to get the tag. PR c/123856 gcc/c-family/ChangeLog: * c-attribs.cc (handle_hardbool_attribute): Fix TYPE_NAME. gcc/testsuite/ChangeLog: * gcc.dg/pr123856.c: New test. Diff: --- gcc/c-family/c-attribs.cc | 11 ++++++----- gcc/testsuite/gcc.dg/pr123856.c | 19 +++++++++++++++++++ 2 files changed, 25 insertions(+), 5 deletions(-) diff --git a/gcc/c-family/c-attribs.cc b/gcc/c-family/c-attribs.cc index 10d9a51418ef..d437c55285e3 100644 --- a/gcc/c-family/c-attribs.cc +++ b/gcc/c-family/c-attribs.cc @@ -1229,13 +1229,14 @@ handle_hardbool_attribute (tree *node, tree name, tree args, gcc_checking_assert (!TYPE_CACHED_VALUES_P (*node)); TYPE_VALUES (*node) = values; - TYPE_NAME (*node) = unqual; if (TYPE_QUALS (orig) != TYPE_QUALS (*node)) - { - *node = build_qualified_type (*node, TYPE_QUALS (orig)); - TYPE_NAME (*node) = orig; - } + *node = build_qualified_type (*node, TYPE_QUALS (orig)); + + if (TREE_CODE (orig) == TYPE_DECL) + TYPE_NAME (*node) = TYPE_NAME (orig); + else + TYPE_NAME (*node) = NULL_TREE; return NULL_TREE; } diff --git a/gcc/testsuite/gcc.dg/pr123856.c b/gcc/testsuite/gcc.dg/pr123856.c new file mode 100644 index 000000000000..2967243220af --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr123856.c @@ -0,0 +1,19 @@ +/* { dg-do compile } */ +/* { dg-options "-Wenum-conversion" } */ + +typedef __attribute__((__hardbool__)) int A, B; + +B b; +void bar(A) { } +void foo() { bar(b); } /* { dg-warning "implicit conversion" } */ + +void bar2(__attribute__((__hardbool__)) int) { } +void foo2() { bar2(b); } /* { dg-warning "implicit conversion" } */ + +__attribute__((__hardbool__)) int c; +void bar3(__attribute__((__hardbool__)) int) { } +void foo3() { bar2(c); } /* { dg-warning "implicit conversion" } */ + +void bar4(int) { } +void foo4() { bar2(c); } /* { dg-warning "implicit conversion" } */ +
