* tree-vectorizer.c: New File: loop vectorization on SSAed GIMPLE trees.

        * tree-vectorizer.h: New File: Same.
        * Makefile.in (tree-vectorizer.c, tree-vectorizer.h): Add new files.
        * common.opt (ftree-vectorize): New flag to enable vectorization.
        * timevar.def (TV_TREE_VECTORIZATION): New dump file for vectorization
        pass.
        * tree-data-ref.h (init_data_ref): Additional argument.
        (array_base_name_differ_p): Moved to tree-data-ref.c.
        * tree-data-ref.c (array_base_name_differ_p): Revised.
        (initialize_data_dependence_relation): Call array_base_name_differ_p
        with an extra argument.
        (analyze_all_data_dependences): Same.
        (init_data_ref): Additional argument is_read to set DR_IS_READ.
        * tree-ssa-phiopt.c (empty_block_p): Expose for usage out of this file.
        * tree-flow.h (vectorize_loops, empty_block_p): Add declaration.
        * tree-optimize.c (pass_vectorize): Schedule the vectorization pass.
        * tree-pass.h (tree_opt_pass pass_vectorize): Declare the new
        vectorization pass.
        * tree-ssa-loop.c (tree_ssa_loop_init): Call scev_initialize.
        (tree_ssa_loop_done): Call scev_finalize.
        (tree_vectorize): Define the new vectorization pass.
        * defaults.h (UNITS_PER_SIMD_WORD): Allow targets to specify the size of
        the vector they support (until support for multiple vector sizes is
        added to the vectorizer).
        * config/i386/i386.h (UNITS_PER_SIMD_WORD): Define.
        * config/rs6000/rs6000.h (UNITS_PER_SIMD_WORD): Define.
        * invoke.texi (fdump-tree-vect, ftree-vectorize): Add
        documentation.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@86131 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 27 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/vect/vect-10.c b/gcc/testsuite/gcc.dg/vect/vect-10.c
new file mode 100644
index 00000000000..b14f8eaa11e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-10.c
@@ -0,0 +1,27 @@
+/* { dg-do compile { target powerpc*-*-* i?86-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -ftree-vectorize -fdump-tree-vect-stats -maltivec" { target powerpc*-*-* } } */
+/* { dg-options "-O2 -ftree-vectorize -fdump-tree-vect-stats -msse2" { target i?86-*-* x86_64-*-* } } */
+
+#define N 16
+
+short a[N];
+short d[N];
+
+int foo ()
+{
+  int i;
+  short b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
+  short c[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
+
+
+  /* Not vetorizable yet (strided access pattern).  */
+  for (i = 0; i < N/2; i++)
+    {
+      a[i] = b[2*i+1] * c[2*i+1] - b[2*i] * c[2*i];
+      d[i] = b[2*i] * c[2*i+1] + b[2*i+1] * c[2*i];
+    } 
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 0 loops" 1 "vect" } } */