When enabling AVX512FP via attribute or pragma, the _Float16 type would
remain unavailable when at initialization time SSE2 wouldn't be seen as
available for use. While this may hint at a wider underlying issue (like
the feature, the type may want providing dynamically, albeit this may be
challenging in particular for functions returning _Float16 yet having
the attribute specified after their return type), for now simply make
SSE2 available when targeting ix86.
gcc/testsuite/
* gcc.target/i386/avx512fp16-reduce-op-2.c: Force SSE2 for i?86.
* gcc.target/i386/pr99464.c: Likewise.
--- a/gcc/testsuite/gcc.target/i386/avx512fp16-reduce-op-2.c
+++ b/gcc/testsuite/gcc.target/i386/avx512fp16-reduce-op-2.c
@@ -1,5 +1,6 @@
/* { dg-do compile } */
/* { dg-options "-O2 -mprefer-vector-width=512 -fdump-tree-optimized" } */
+/* { dg-additional-options "-msse2" { target i?86-*-* } } */
/* { dg-final { scan-tree-dump-times "\.REDUC_PLUS" 3 "optimized" } } */
/* { dg-final { scan-tree-dump-times "\.REDUC_MIN" 3 "optimized" } } */
--- a/gcc/testsuite/gcc.target/i386/pr99464.c
+++ b/gcc/testsuite/gcc.target/i386/pr99464.c
@@ -1,6 +1,7 @@
/* PR target/99464 */
/* { dg-do compile } */
/* { dg-options "-O2" } */
+/* { dg-additional-options "-msse2" { target i?86-*-* } } */
#pragma GCC target("arch=cannonlake")
