[PATCH] i386: -mno-xsave should disable all relevant ISA flags [PR104462]

[Uros Bizjak via Gcc-patches]

2022-02-09  Uroš Bizjak  <ubiz...@gmail.com>

gcc/ChangeLog:

    PR target/104462
    * common/config/i386/i386-common.cc (OPTION_MASK_ISA2_XSAVE_UNSET):
    Also include OPTION_MASK_ISA2_AVX2_UNSET.

gcc/testsuite/ChangeLog:

    PR target/104462
    * gcc.target/i386/pr104462.c: New test.

Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.

Pushed to master.

Uros.

diff --git a/gcc/common/config/i386/i386-common.cc 
b/gcc/common/config/i386/i386-common.cc
index 607e9f20e85..449df6351c9 100644
--- a/gcc/common/config/i386/i386-common.cc
+++ b/gcc/common/config/i386/i386-common.cc
@@ -206,7 +206,8 @@ along with GCC; see the file COPYING3.  If not see
   (OPTION_MASK_ISA_XSAVE | OPTION_MASK_ISA_XSAVEOPT_UNSET \
    | OPTION_MASK_ISA_XSAVES_UNSET | OPTION_MASK_ISA_XSAVEC_UNSET \
    | OPTION_MASK_ISA_AVX_UNSET)
-#define OPTION_MASK_ISA2_XSAVE_UNSET OPTION_MASK_ISA2_AMX_TILE_UNSET
+#define OPTION_MASK_ISA2_XSAVE_UNSET \
+  (OPTION_MASK_ISA2_AVX2_UNSET | OPTION_MASK_ISA2_AMX_TILE_UNSET)
 #define OPTION_MASK_ISA_XSAVEOPT_UNSET OPTION_MASK_ISA_XSAVEOPT
 #define OPTION_MASK_ISA_AVX2_UNSET \
   (OPTION_MASK_ISA_AVX2 | OPTION_MASK_ISA_AVX512F_UNSET)
diff --git a/gcc/testsuite/gcc.target/i386/pr104462.c 
b/gcc/testsuite/gcc.target/i386/pr104462.c
new file mode 100644
index 00000000000..7a5ee64f431
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr104462.c
@@ -0,0 +1,13 @@
+/* PR target/104462 */
+/* { dg-do compile } */
+/* { dg-options "-mavx512fp16 -mno-xsave" } */
+
+typedef _Float16 __attribute__((__vector_size__ (8))) F;
+
+F f;
+
+void
+foo (void)
+{
+  f *= -f;
+}