i386-opts.h (enum stringop_alg): Add vector_loop.

ChangeLog:
        * config/i386/i386-opts.h (enum stringop_alg): Add vector_loop.
        * config/i386/i386.c (expand_set_or_movmem_via_loop): Use
        adjust_address instead of change_address to keep info about alignment.
        (emit_strmov): Remove.
        (emit_memmov): New function.
        (expand_movmem_epilogue): Refactor to properly handle bigger sizes.
        (expand_movmem_epilogue): Likewise and return updated rtx for
        destination.
        (expand_constant_movmem_prologue): Likewise and return updated rtx for
        destination and source.
        (decide_alignment): Refactor, handle vector_loop.
        (ix86_expand_movmem): Likewise.
        (ix86_expand_setmem): Likewise.
        * config/i386/i386.opt (Enum): Add vector_loop to option stringop_alg.

testsuite/ChangeLog:
        * gcc.target/i386/memcpy-vector_loop-1.c: New.
        * gcc.target/i386/memcpy-vector_loop-2.c: New.

From-SVN: r200751

gcc/ChangeLog

+2013-07-08  Michael Zolotukhin  <michael.v.zolotukhin@gmail.com>
+
+	* config/i386/i386-opts.h (enum stringop_alg): Add vector_loop.
+	* config/i386/i386.c (expand_set_or_movmem_via_loop): Use
+	adjust_address instead of change_address to keep info about alignment.
+	(emit_strmov): Remove.
+	(emit_memmov): New function.
+	(expand_movmem_epilogue): Refactor to properly handle bigger sizes.
+	(expand_movmem_epilogue): Likewise and return updated rtx for
+	destination.
+	(expand_constant_movmem_prologue): Likewise and return updated rtx for
+	destination and source.
+	(decide_alignment): Refactor, handle vector_loop.
+	(ix86_expand_movmem): Likewise.
+	(ix86_expand_setmem): Likewise.
+	* config/i386/i386.opt (Enum): Add vector_loop to option stringop_alg.
+
 2013-07-07  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/driver-i386.c (host_detect_local_cpu): Do not check

gcc/config/i386/i386-opts.h

@@ -35,7 +35,8 @@ enum stringop_alg
    rep_prefix_8_byte,
    loop_1_byte,
    loop,
-   unrolled_loop
+   unrolled_loop,
+   vector_loop
 };
 
 /* Available call abi.  */

gcc/config/i386/i386.opt

@@ -345,6 +345,9 @@ Enum(stringop_alg) String(loop) Value(loop)
 EnumValue
 Enum(stringop_alg) String(unrolled_loop) Value(unrolled_loop)
 
+EnumValue
+Enum(stringop_alg) String(vector_loop) Value(vector_loop)
+
 mtls-dialect=
 Target RejectNegative Joined Var(ix86_tls_dialect) Enum(tls_dialect) Init(TLS_DIALECT_GNU)
 Use given thread-local storage dialect

gcc/testsuite/ChangeLog

+2013-07-08  Michael Zolotukhin  <michael.v.zolotukhin@gmail.com>
+
+	* gcc.target/i386/memcpy-vector_loop-1.c: New.
+	* gcc.target/i386/memcpy-vector_loop-2.c: New.
+
 2013-07-06  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/57807

gcc/testsuite/gcc.target/i386/memcpy-vector_loop-1.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -march=atom -minline-all-stringops -mstringop-strategy=vector_loop" } */
+/* { dg-final { scan-assembler-times "movdqa" 8 { target { ! { ia32 } } } } } */
+/* { dg-final { scan-assembler-times "movdqa" 4 { target { ia32 } } } } */
+
+char a[2048];
+char b[2048];
+void t (void)
+{
+  __builtin_memcpy (a, b, 2048);
+}
+

gcc/testsuite/gcc.target/i386/memcpy-vector_loop-2.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -march=atom -minline-all-stringops -mstringop-strategy=vector_loop" } */
+/* { dg-final { scan-assembler-times "movdqa" 4} } */
+
+char *a;
+char *b;
+void t (void)
+{
+  __builtin_memcpy (a, b, 2048);
+}
+
+