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From 84d2a5509892b65ed60d39e6e2f9719e3762e40e Mon Sep 17 00:00:00 2001
From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 31 May 2016 08:29:39 +0000
Subject: [PATCH] [ARM] PR target/71056: Don't use vectorized builtins when
 NEON is not available

	PR target/71056
	* config/arm/arm-builtins.c (arm_builtin_vectorized_function): Return
	NULL_TREE early if NEON is not available.  Remove now redundant check
	in ARM_CHECK_BUILTIN_MODE.

	* gcc.target/arm/pr71056.c: New test.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-6-branch@236910 138bc75d-0d04-0410-961f-82ee72b054a4
---
Upstream-Status: Backport
Signed-off-by: Khem Raj <raj.khem@gmail.com>

 gcc/ChangeLog                          |  7 +++++++
 gcc/config/arm/arm-builtins.c          |  6 +++++-
 gcc/testsuite/ChangeLog                |  5 +++++
 gcc/testsuite/gcc.target/arm/pr71056.c | 32 ++++++++++++++++++++++++++++++++
 4 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.target/arm/pr71056.c

diff --git a/gcc/config/arm/arm-builtins.c b/gcc/config/arm/arm-builtins.c
index 90fb40f..68b2839 100644
--- a/gcc/config/arm/arm-builtins.c
+++ b/gcc/config/arm/arm-builtins.c
@@ -2861,6 +2861,10 @@ arm_builtin_vectorized_function (unsigned int fn, tree type_out, tree type_in)
   int in_n, out_n;
   bool out_unsigned_p = TYPE_UNSIGNED (type_out);
 
+  /* Can't provide any vectorized builtins when we can't use NEON.  */
+  if (!TARGET_NEON)
+    return NULL_TREE;
+
   if (TREE_CODE (type_out) != VECTOR_TYPE
       || TREE_CODE (type_in) != VECTOR_TYPE)
     return NULL_TREE;
@@ -2875,7 +2879,7 @@ arm_builtin_vectorized_function (unsigned int fn, tree type_out, tree type_in)
    NULL_TREE is returned if no such builtin is available.  */
 #undef ARM_CHECK_BUILTIN_MODE
 #define ARM_CHECK_BUILTIN_MODE(C)    \
-  (TARGET_NEON && TARGET_FPU_ARMV8   \
+  (TARGET_FPU_ARMV8   \
    && flag_unsafe_math_optimizations \
    && ARM_CHECK_BUILTIN_MODE_1 (C))
 
diff --git a/gcc/testsuite/gcc.target/arm/pr71056.c b/gcc/testsuite/gcc.target/arm/pr71056.c
new file mode 100644
index 0000000..136754e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/pr71056.c
@@ -0,0 +1,32 @@
+/* PR target/71056.  */
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_vfp3_ok } */
+/* { dg-options "-O3 -mfpu=vfpv3" } */
+
+/* Check that compiling for a non-NEON target doesn't try to introduce
+   a NEON vectorized builtin.  */
+
+extern char *buff;
+int f2 ();
+struct T1
+{
+  int reserved[2];
+  unsigned int ip;
+  unsigned short cs;
+  unsigned short rsrv2;
+};
+void
+f3 (const char *p)
+{
+  struct T1 x;
+  __builtin_memcpy (&x, p, sizeof (struct T1));
+  x.reserved[0] = __builtin_bswap32 (x.reserved[0]);
+  x.reserved[1] = __builtin_bswap32 (x.reserved[1]);
+  x.ip = __builtin_bswap32 (x.ip);
+  x.cs = x.cs << 8 | x.cs >> 8;
+  x.rsrv2 = x.rsrv2 << 8 | x.rsrv2 >> 8;
+  if (f2 ())
+    {
+      __builtin_memcpy (buff, "\n", 1);
+    }
+}
-- 
2.9.0