[PATCH] Fix ICE for SIMD clones usage in LTO

[Ilya Enkovich]

Hi,

When SIMD clone is created original function may be defined in another 
partition.  In this case SIMD clone also has to have in_other_partition flag.  
Now it doesn't and we get an ICE.  This patch fixes it.  Bootstrapped and 
regtested for x86_64-unknown-linux-gnu.  OK for trunk?

Thanks,
Ilya
--
gcc/

2015-10-05  Ilya Enkovich  <enkovich....@gmail.com>

        * omp-low.c (simd_clone_create): Set in_other_partition
        for created clones.

gcc/testsuite/

2015-10-05  Ilya Enkovich  <enkovich....@gmail.com>

        * gcc.dg/lto/simd-function_0.c: New test.


diff --git a/gcc/omp-low.c b/gcc/omp-low.c
index cdcf9d6..8d25784 100644
--- a/gcc/omp-low.c
+++ b/gcc/omp-low.c
@@ -12948,6 +12948,8 @@ simd_clone_create (struct cgraph_node *old_node)
       DECL_STATIC_CONSTRUCTOR (new_decl) = 0;
       DECL_STATIC_DESTRUCTOR (new_decl) = 0;
       new_node = old_node->create_version_clone (new_decl, vNULL, NULL);
+      if (old_node->in_other_partition)
+       new_node->in_other_partition = 1;
       symtab->call_cgraph_insertion_hooks (new_node);
     }
   if (new_node == NULL)
diff --git a/gcc/testsuite/gcc.dg/lto/simd-function_0.c 
b/gcc/testsuite/gcc.dg/lto/simd-function_0.c
new file mode 100755
index 0000000..cda31aa
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/lto/simd-function_0.c
@@ -0,0 +1,34 @@
+/* { dg-lto-do link } */
+/* { dg-require-effective-target avx2 } */
+/* { dg-lto-options { { -fopenmp-simd -O3 -ffast-math -mavx2 -flto 
-flto-partition=max } } } */
+
+#define SIZE 4096
+float x[SIZE];
+
+
+#pragma omp declare simd
+float
+__attribute__ ((noinline))
+my_mul (float x, float y) {
+  return x * y;
+}
+
+__attribute__ ((noinline))
+int foo ()
+{
+  int i = 0;
+#pragma omp simd safelen (16)
+  for (i = 0; i < SIZE; i++)
+    x[i] = my_mul ((float)i, 9932.3323);
+  return (int)x[0];
+}
+
+int main ()
+{
+  int i = 0;
+  for (i = 0; i < SIZE; i++)
+    x[i] = my_mul ((float) i, 9932.3323);
+  foo ();
+  return (int)x[0];
+}
+