[gcc r15-7592] c++: add fixed test [PR102455]

[Marek Polacek via Gcc-cvs]

https://gcc.gnu.org/g:1787119229abca0c78f9c902eeb7c88efed37ce0

commit r15-7592-g1787119229abca0c78f9c902eeb7c88efed37ce0
Author: Marek Polacek <pola...@redhat.com>
Date:   Mon Feb 17 12:36:05 2025 -0500

    c++: add fixed test [PR102455]
    
    Fixed by r13-4564 but the tests are very different.
    
            PR c++/102455
    
    gcc/testsuite/ChangeLog:
    
            * g++.dg/ext/vector43.C: New test.

Diff:
---
 gcc/testsuite/g++.dg/ext/vector43.C | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gcc/testsuite/g++.dg/ext/vector43.C 
b/gcc/testsuite/g++.dg/ext/vector43.C
new file mode 100644
index 000000000000..6efbe0ff1975
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/vector43.C
@@ -0,0 +1,7 @@
+// PR c++/102455
+// { dg-do compile { target c++14 } }
+
+typedef int v4si;
+typedef float v4sf __attribute__ ((vector_size(4)));
+constexpr v4sf foo (v4si a) { return (v4sf)a;}
+template <class> constexpr v4sf b = foo (v4si {});