i386.c (ix86_get_mask_mode): Use scalar modes for 32 and 16 byte boolean vectors...

gcc/

	* config/i386/i386.c (ix86_get_mask_mode): Use scalar
	modes for 32 and 16 byte boolean vectors when possible.

gcc/testsuite/

	* gcc.dg/vect/vect-32-chars.c: New test.

From-SVN: r231553

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ab875851c89e5fdbf1b07a8cd1c5d59e8bb3b304..bc3f17201d0298892ecc255327f0869db283ea28 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-12-11  Ilya Enkovich  <enkovich.gnu@gmail.com>
+
+       * config/i386/i386.c (ix86_get_mask_mode): Use scalar
+       modes for 32 and 16 byte boolean vectors when possible.
+
 2015-12-11  Segher Boessenkool  <segher@kernel.crashing.org>
 
        PR rtl-optimization/67778

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index d30fbff7af489afd81b2010de0989e03d4b35ed8..e565c0bc643a13ba65f2c53843dc2486c519994e 100644 (file)
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -53533,7 +53533,8 @@ ix86_get_mask_mode (unsigned nunits, unsigned vector_size)
   unsigned elem_size = vector_size / nunits;
 
   /* Scalar mask case.  */
-  if (TARGET_AVX512F && vector_size == 64)
+  if ((TARGET_AVX512F && vector_size == 64)
+      || (TARGET_AVX512VL && (vector_size == 32 || vector_size == 16)))
     {
       if (elem_size == 4 || elem_size == 8 || TARGET_AVX512BW)
        return smallest_mode_for_size (nunits, MODE_INT);

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 725704614923f1e489f5d6fdad85ae169a00b2b3..9550dc22ecd0c09af2ac2020f25f8fdbbf750bac 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2015-12-11  Ilya Enkovich  <enkovich.gnu@gmail.com>
+
+       * gcc.dg/vect/vect-32-chars.c: New test.
+
 2015-12-11  Jan Hubicka  <hubicka@ucw.cz>
 
        PR ipa/61886

diff --git a/gcc/testsuite/gcc.dg/vect/vect-32-chars.c b/gcc/testsuite/gcc.dg/vect/vect-32-chars.c
new file mode 100644 (file)
index 0000000..0af5d2d
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-32-chars.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-mavx512bw -mavx512vl" { target { i?86-*-* x86_64-*-* } } } */
+
+char a[32];
+char b[32];
+char c[32];
+
+void test()
+{
+  int i = 0;
+  for (i = 0; i < 32; i++)
+    if (b[i] > 0)
+      a[i] = c[i];
+}
+
+/* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" { target { i?86-*-* x86_64-*-* } } } } */