From ee6c5afec36aee14d2244a37a833ef7c2d16ab88 Mon Sep 17 00:00:00 2001
From: Lingling Kong <lingling.kong@intel.com>
Date: Wed, 24 Jul 2024 14:52:47 +0800
Subject: [PATCH] x86: Don't enable APX_F in 32-bit mode

gcc/ChangeLog:

	PR target/115978
	* config/i386/driver-i386.cc (host_detect_local_cpu):  Enable
	APX_F only for 64-bit codegen.
	* config/i386/i386-options.cc (DEF_PTA):  Skip PTA_APX_F if
	not in 64-bit mode.

gcc/testsuite/ChangeLog:

	PR target/115978
	* gcc.target/i386/pr115978-1.c: New test.
	* gcc.target/i386/pr115978-2.c: Ditto.
---
 gcc/config/i386/driver-i386.cc             |  3 ++-
 gcc/config/i386/i386-options.cc            |  3 ++-
 gcc/testsuite/gcc.target/i386/pr115978-1.c | 22 ++++++++++++++++++++++
 gcc/testsuite/gcc.target/i386/pr115978-2.c |  6 ++++++
 4 files changed, 32 insertions(+), 2 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/i386/pr115978-1.c
 create mode 100644 gcc/testsuite/gcc.target/i386/pr115978-2.c

diff --git a/gcc/config/i386/driver-i386.cc b/gcc/config/i386/driver-i386.cc
index bb53af4b2039..695d8e6cdf14 100644
--- a/gcc/config/i386/driver-i386.cc
+++ b/gcc/config/i386/driver-i386.cc
@@ -893,7 +893,8 @@ const char *host_detect_local_cpu (int argc, const char **argv)
 	    if (has_feature (isa_names_table[i].feature))
 	      {
 		if (codegen_x86_64
-		    || isa_names_table[i].feature != FEATURE_UINTR)
+		    || (isa_names_table[i].feature != FEATURE_UINTR
+			&& isa_names_table[i].feature != FEATURE_APX_F))
 		  options = concat (options, " ",
 				    isa_names_table[i].option, NULL);
 	      }
diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc
index af450dba73dd..6c212a8edeb9 100644
--- a/gcc/config/i386/i386-options.cc
+++ b/gcc/config/i386/i386-options.cc
@@ -2385,7 +2385,8 @@ ix86_option_override_internal (bool main_args_p,
 #define DEF_PTA(NAME) \
 	if (((processor_alias_table[i].flags & PTA_ ## NAME) != 0) \
 	    && PTA_ ## NAME != PTA_64BIT \
-	    && (TARGET_64BIT || PTA_ ## NAME != PTA_UINTR) \
+	    && (TARGET_64BIT || (PTA_ ## NAME != PTA_UINTR \
+				 && PTA_ ## NAME != PTA_APX_F))\
 	    && !TARGET_EXPLICIT_ ## NAME ## _P (opts)) \
 	  SET_TARGET_ ## NAME (opts);
 #include "i386-isa.def"
diff --git a/gcc/testsuite/gcc.target/i386/pr115978-1.c b/gcc/testsuite/gcc.target/i386/pr115978-1.c
new file mode 100644
index 000000000000..18a1c5f153a3
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr115978-1.c
@@ -0,0 +1,22 @@
+/* { dg-do run } */
+/* { dg-options "-O2 -march=native" } */
+
+int
+main ()
+{
+  if (__builtin_cpu_supports ("apxf"))
+    {
+#ifdef __x86_64__
+# ifndef __APX_F__
+      __builtin_abort ();
+# endif
+#else
+# ifdef __APX_F__
+      __builtin_abort ();
+# endif
+#endif
+      return 0;
+    }
+
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/i386/pr115978-2.c b/gcc/testsuite/gcc.target/i386/pr115978-2.c
new file mode 100644
index 000000000000..900d6eb096ad
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr115978-2.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -march=native -mno-apxf" } */
+
+#ifdef __APX_F__
+# error APX_F should be disabled
+#endif