[pushed] Use _Float128 in test for PR118184

[Richard Sandiford]

The test was failing on x86 because longdouble128 only checks sizeof,
rather than a full 128-bit payload.  Using _Float128 is more portable
and still exposes the original bug.

Tested on aarch64-linux-gnu and x86_64-linux-gnu, pushed as obvious.

Richard


gcc/testsuite/
        PR target/118184
        * gcc.dg/torture/pr118184.c: Use _Float128 instead of long double.
---
 gcc/testsuite/gcc.dg/torture/pr118184.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/testsuite/gcc.dg/torture/pr118184.c 
b/gcc/testsuite/gcc.dg/torture/pr118184.c
index 20f567af11f..5933e2a1222 100644
--- a/gcc/testsuite/gcc.dg/torture/pr118184.c
+++ b/gcc/testsuite/gcc.dg/torture/pr118184.c
@@ -1,8 +1,8 @@
-/* { dg-do run { target { longdouble128 && lp64 } } } */
+/* { dg-do run { target { float128 && lp64 } } } */
 
 union u1
 {
-  long double ld;
+  _Float128 ld;
   unsigned long l[2];
 };
 
@@ -13,7 +13,7 @@ unsigned long m()
 }
 
 [[gnu::noinline]]
-long double f(void)
+_Float128 f(void)
 {
   union u1 u;
   u.ld = __builtin_nanf128("");
-- 
2.25.1