[PATCH 43/46] i386: Enable 8-byte vectorizer for TARGET_MMX_WITH_SSE

[H.J. Lu]

In 64-bit, we support 8-byte vectorizer with SSE when MMX is disabled.
Also xfail x86-64 targets for gcc.dg/tree-ssa/pr84512.c.

gcc/

        PR target/89028
        * config/i386/i386.c (ix86_autovectorize_vector_sizes): Enable
        8-byte vectorizer for TARGET_MMX_WITH_SSE.

gcc/testsuite/

        PR target/89028
        * gcc.dg/tree-ssa/pr84512.c: Also xfail x86-64 targets.
        * gcc.target/i386/pr89028-1.c: New test.
---
 gcc/config/i386/i386.c                    |  2 ++
 gcc/testsuite/gcc.dg/tree-ssa/pr84512.c   |  2 +-
 gcc/testsuite/gcc.target/i386/pr89028-1.c | 10 ++++++++++
 3 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.target/i386/pr89028-1.c

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index ae517959639..b1f538969d2 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -50215,6 +50215,8 @@ ix86_autovectorize_vector_sizes (vector_sizes *sizes)
       sizes->safe_push (32);
       sizes->safe_push (16);
     }
+  if (TARGET_MMX_WITH_SSE)
+    sizes->safe_push (8);
 }
 
 /* Implemenation of targetm.vectorize.get_mask_mode.  */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr84512.c 
b/gcc/testsuite/gcc.dg/tree-ssa/pr84512.c
index 3975757d844..8f8529ba8cf 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/pr84512.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr84512.c
@@ -13,4 +13,4 @@ int foo()
 }
 
 /* Listed targets xfailed due to PR84958.  */
-/* { dg-final { scan-tree-dump "return 285;" "optimized" { xfail { { 
alpha*-*-* amdgcn*-*-* nvptx*-*-* } || { sparc*-*-* && lp64 } } } } } */
+/* { dg-final { scan-tree-dump "return 285;" "optimized" { xfail { { { 
alpha*-*-* amdgcn*-*-* nvptx*-*-* } || { sparc*-*-* && lp64 } } || { { i?86-*-* 
x86_64-*-* } && { ! ia32 } } } } } } */
diff --git a/gcc/testsuite/gcc.target/i386/pr89028-1.c 
b/gcc/testsuite/gcc.target/i386/pr89028-1.c
new file mode 100644
index 00000000000..d2ebb7f844d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr89028-1.c
@@ -0,0 +1,10 @@
+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-options "-mavx2 -O3" } */
+/* { dg-final { scan-assembler "vpaddb\[ \\t\]+\[^\n\]*%xmm\[0-9\]" } } */
+
+void
+foo (char* restrict r, char* restrict a)
+{
+  for (int i = 0; i < 8; i++)
+    r[i] += a[i];
+}
-- 
2.20.1