x86: Add TARGET_AVX256_[MOVE|STORE]_BY_PIECES

1. Add TARGET_AVX256_MOVE_BY_PIECES to perform move by-pieces operation
with 256-bit AVX instructions.
2. Add TARGET_AVX256_STORE_BY_PIECES to perform move and store by-pieces
operations with 256-bit AVX instructions.

They are enabled only for Intel Alder Lake and Intel processors with
AVX512.

gcc/

	PR target/101935
	* config/i386/i386.h (TARGET_AVX256_MOVE_BY_PIECES): New.
	(TARGET_AVX256_STORE_BY_PIECES): Likewise.
	(MOVE_MAX): Check TARGET_AVX256_MOVE_BY_PIECES and
	TARGET_AVX256_STORE_BY_PIECES instead of
	TARGET_AVX256_SPLIT_UNALIGNED_LOAD and
	TARGET_AVX256_SPLIT_UNALIGNED_STORE.
	(STORE_MAX_PIECES): Check TARGET_AVX256_STORE_BY_PIECES instead
	of TARGET_AVX256_SPLIT_UNALIGNED_STORE.
	* config/i386/x86-tune.def (X86_TUNE_AVX256_MOVE_BY_PIECES): New.
	(X86_TUNE_AVX256_STORE_BY_PIECES): Likewise.

gcc/testsuite/

	PR target/101935
	* g++.target/i386/pr80566-1.C: Add
	-mtune-ctrl=avx256_store_by_pieces.
	* gcc.target/i386/pr100865-4a.c: Likewise.
	* gcc.target/i386/pr100865-10a.c: Likewise.
	* gcc.target/i386/pr90773-20.c: Likewise.
	* gcc.target/i386/pr90773-21.c: Likewise.
	* gcc.target/i386/pr90773-22.c: Likewise.
	* gcc.target/i386/pr90773-23.c: Likewise.
	* g++.target/i386/pr80566-2.C: Add
	-mtune-ctrl=avx256_move_by_pieces.
	* gcc.target/i386/eh_return-1.c: Likewise.
	* gcc.target/i386/pr90773-26.c: Likewise.
	* gcc.target/i386/pieces-memcpy-12.c: Replace -mtune=haswell
	with -mtune-ctrl=avx256_move_by_pieces.
	* gcc.target/i386/pieces-memcpy-15.c: Likewise.
	* gcc.target/i386/pieces-memset-2.c: Replace -mtune=haswell
	with -mtune-ctrl=avx256_store_by_pieces.
	* gcc.target/i386/pieces-memset-5.c: Likewise.
	* gcc.target/i386/pieces-memset-11.c: Likewise.
	* gcc.target/i386/pieces-memset-14.c: Likewise.
	* gcc.target/i386/pieces-memset-20.c: Likewise.
	* gcc.target/i386/pieces-memset-23.c: Likewise.
	* gcc.target/i386/pieces-memset-29.c: Likewise.
	* gcc.target/i386/pieces-memset-30.c: Likewise.
	* gcc.target/i386/pieces-memset-33.c: Likewise.
	* gcc.target/i386/pieces-memset-34.c: Likewise.
	* gcc.target/i386/pieces-memset-44.c: Likewise.
	* gcc.target/i386/pieces-memset-37.c: Replace -mtune=generic
	with -mtune-ctrl=avx256_store_by_pieces.

26 files changed, 42 insertions, 27 deletions

diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index 73237b8..e76bb55 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -403,6 +403,10 @@ extern unsigned char ix86_tune_features[X86_TUNE_LAST];
 	ix86_tune_features[X86_TUNE_AVOID_LEA_FOR_ADDR]
 #define TARGET_SOFTWARE_PREFETCHING_BENEFICIAL \
 	ix86_tune_features[X86_TUNE_SOFTWARE_PREFETCHING_BENEFICIAL]
+#define TARGET_AVX256_MOVE_BY_PIECES \
+	ix86_tune_features[X86_TUNE_AVX256_MOVE_BY_PIECES]
+#define TARGET_AVX256_STORE_BY_PIECES \
+	ix86_tune_features[X86_TUNE_AVX256_STORE_BY_PIECES]
 #define TARGET_AVX256_SPLIT_REGS \
 	ix86_tune_features[X86_TUNE_AVX256_SPLIT_REGS]
 #define TARGET_GENERAL_REGS_SSE_SPILL \
@@ -1793,8 +1797,8 @@ typedef struct ix86_args {
    ? 64 \
    : ((TARGET_AVX \
        && !TARGET_PREFER_AVX128 \
-       && !TARGET_AVX256_SPLIT_UNALIGNED_LOAD \
-       && !TARGET_AVX256_SPLIT_UNALIGNED_STORE) \
+       && (TARGET_AVX256_MOVE_BY_PIECES \
+	   || TARGET_AVX256_STORE_BY_PIECES)) \
       ? 32 \
       : ((TARGET_SSE2 \
 	  && TARGET_SSE_UNALIGNED_LOAD_OPTIMAL \
@@ -1811,7 +1815,7 @@ typedef struct ix86_args {
       ? 64 \
       : ((TARGET_AVX \
 	  && !TARGET_PREFER_AVX128 \
-	  && !TARGET_AVX256_SPLIT_UNALIGNED_STORE) \
+	  && TARGET_AVX256_STORE_BY_PIECES) \
 	  ? 32 \
 	  : ((TARGET_SSE2 \
 	      && TARGET_SSE_UNALIGNED_STORE_OPTIMAL) \
diff --git a/gcc/config/i386/x86-tune.def b/gcc/config/i386/x86-tune.def
index 8f55da8..2f221b1 100644
--- a/gcc/config/i386/x86-tune.def
+++ b/gcc/config/i386/x86-tune.def
@@ -484,6 +484,17 @@ DEF_TUNE (X86_TUNE_AVX128_OPTIMAL, "avx128_optimal", m_BDVER | m_BTVER2
    instructions in the auto-vectorizer.  */
 DEF_TUNE (X86_TUNE_AVX256_OPTIMAL, "avx256_optimal", m_CORE_AVX512)
 
+/* X86_TUNE_AVX256_MOVE_BY_PIECES: Optimize move_by_pieces with 256-bit
+   AVX instructions.  */
+DEF_TUNE (X86_TUNE_AVX256_MOVE_BY_PIECES, "avx256_move_by_pieces",
+	  m_ALDERLAKE | m_CORE_AVX512)
+
+/* X86_TUNE_AVX256_STORE_BY_PIECES: Optimize store_by_pieces with 256-bit
+   AVX instructions.  */
+DEF_TUNE (X86_TUNE_AVX256_STORE_BY_PIECES, "avx256_store_by_pieces",
+	  m_ALDERLAKE | m_CORE_AVX512)
+
+/*****************************************************************************/
 /*****************************************************************************/
 /* Historical relics: tuning flags that helps a specific old CPU designs     */
 /*****************************************************************************/
diff --git a/gcc/testsuite/g++.target/i386/pr80566-1.C b/gcc/testsuite/g++.target/i386/pr80566-1.C
index 753f974..29da31d 100644
--- a/gcc/testsuite/g++.target/i386/pr80566-1.C
+++ b/gcc/testsuite/g++.target/i386/pr80566-1.C
@@ -1,5 +1,5 @@
 // { dg-do compile }
-// { dg-options "-O2 -march=haswell" }
+// { dg-options "-O2 -march=haswell -mtune-ctrl=avx256_store_by_pieces" }
 
 #include <cstring>
 
diff --git a/gcc/testsuite/g++.target/i386/pr80566-2.C b/gcc/testsuite/g++.target/i386/pr80566-2.C
index 2a2e82d..9ffd2c8 100644
--- a/gcc/testsuite/g++.target/i386/pr80566-2.C
+++ b/gcc/testsuite/g++.target/i386/pr80566-2.C
@@ -1,5 +1,5 @@
 // { dg-do compile }
-// { dg-options "-O2 -march=haswell" }
+// { dg-options "-O2 -march=haswell -mtune-ctrl=avx256_move_by_pieces" }
 
 #include <cstring>
 
diff --git a/gcc/testsuite/gcc.target/i386/eh_return-1.c b/gcc/testsuite/gcc.target/i386/eh_return-1.c
index 671ba63..b21fd75 100644
--- a/gcc/testsuite/gcc.target/i386/eh_return-1.c
+++ b/gcc/testsuite/gcc.target/i386/eh_return-1.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=haswell -mno-avx512f" } */
+/* { dg-options "-O2 -march=haswell -mno-avx512f -mtune-ctrl=avx256_move_by_pieces" } */
 
 struct _Unwind_Context
 {
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memcpy-12.c b/gcc/testsuite/gcc.target/i386/pieces-memcpy-12.c
index f1432eb..8a82baf 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memcpy-12.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memcpy-12.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx2 -mavx -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx2 -mavx -mtune-ctrl=avx256_move_by_pieces" } */
 
 extern char *dst, *src;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memcpy-15.c b/gcc/testsuite/gcc.target/i386/pieces-memcpy-15.c
index 695e8c3..4fb94ce 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memcpy-15.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memcpy-15.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx2 -mavx -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx2 -mavx -mtune-ctrl=avx256_move_by_pieces" } */
 
 extern char *dst, *src;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-11.c b/gcc/testsuite/gcc.target/i386/pieces-memset-11.c
index 3fb9038..3802eb7 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-11.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-11.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx2 -mavx -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx2 -mavx -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-14.c b/gcc/testsuite/gcc.target/i386/pieces-memset-14.c
index 45ece48..10bc085 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-14.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-14.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx2 -mavx -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx2 -mavx -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-2.c b/gcc/testsuite/gcc.target/i386/pieces-memset-2.c
index 649f344..4ebfc4d 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-2.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx2 -mavx -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx2 -mavx -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-20.c b/gcc/testsuite/gcc.target/i386/pieces-memset-20.c
index b8747e6..1dc4db1 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-20.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-20.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx2 -mavx -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx2 -mavx -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-23.c b/gcc/testsuite/gcc.target/i386/pieces-memset-23.c
index a3b4ffc..9232864 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-23.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-23.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx2 -mavx -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx2 -mavx -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-29.c b/gcc/testsuite/gcc.target/i386/pieces-memset-29.c
index 650e6fe..3b07a64 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-29.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-29.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx2 -mavx -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx2 -mavx -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-30.c b/gcc/testsuite/gcc.target/i386/pieces-memset-30.c
index dcec2c7..59595e6 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-30.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-30.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx512f -mavx2 -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx512f -mavx2 -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-33.c b/gcc/testsuite/gcc.target/i386/pieces-memset-33.c
index a87d1b8..6864622 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-33.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-33.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx2 -mavx -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx2 -mavx -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-34.c b/gcc/testsuite/gcc.target/i386/pieces-memset-34.c
index 0c2f1ee..52a16a0 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-34.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-34.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx512f -mavx2 -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx512f -mavx2 -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-37.c b/gcc/testsuite/gcc.target/i386/pieces-memset-37.c
index ec59497..fd09bd1 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-37.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-37.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx512f -mavx2 -mtune=generic" } */
+/* { dg-options "-O2 -mno-avx512f -mavx2 -mtune-ctrl=avx256_store_by_pieces" } */
 
 void
 foo (int a1, int a2, int a3, int a4, int a5, int a6, int x, char *dst)
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-44.c b/gcc/testsuite/gcc.target/i386/pieces-memset-44.c
index ecc31be..5986f8e 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-44.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-44.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx2 -mavx -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx2 -mavx -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pieces-memset-5.c b/gcc/testsuite/gcc.target/i386/pieces-memset-5.c
index 3e95db5..e2379df 100644
--- a/gcc/testsuite/gcc.target/i386/pieces-memset-5.c
+++ b/gcc/testsuite/gcc.target/i386/pieces-memset-5.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-avx2 -mavx -mtune=haswell" } */
+/* { dg-options "-O2 -mno-avx2 -mavx -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pr100865-10a.c b/gcc/testsuite/gcc.target/i386/pr100865-10a.c
index 98b6dfb..1d849a3 100644
--- a/gcc/testsuite/gcc.target/i386/pr100865-10a.c
+++ b/gcc/testsuite/gcc.target/i386/pr100865-10a.c
@@ -1,5 +1,5 @@
 /* { dg-do compile { target int128 } } */
-/* { dg-options "-O3 -march=skylake" } */
+/* { dg-options "-O3 -march=skylake -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern __int128 array[16];
 
diff --git a/gcc/testsuite/gcc.target/i386/pr100865-4a.c b/gcc/testsuite/gcc.target/i386/pr100865-4a.c
index 3654873..8609d11 100644
--- a/gcc/testsuite/gcc.target/i386/pr100865-4a.c
+++ b/gcc/testsuite/gcc.target/i386/pr100865-4a.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=skylake" } */
+/* { dg-options "-O2 -march=skylake -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char array[64];
 
diff --git a/gcc/testsuite/gcc.target/i386/pr90773-20.c b/gcc/testsuite/gcc.target/i386/pr90773-20.c
index e61e405..884a550 100644
--- a/gcc/testsuite/gcc.target/i386/pr90773-20.c
+++ b/gcc/testsuite/gcc.target/i386/pr90773-20.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=skylake" } */
+/* { dg-options "-O2 -march=skylake -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pr90773-21.c b/gcc/testsuite/gcc.target/i386/pr90773-21.c
index 16ad17f..5bbb387 100644
--- a/gcc/testsuite/gcc.target/i386/pr90773-21.c
+++ b/gcc/testsuite/gcc.target/i386/pr90773-21.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=skylake" } */
+/* { dg-options "-O2 -march=skylake -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pr90773-22.c b/gcc/testsuite/gcc.target/i386/pr90773-22.c
index 45a8ff6..245a436 100644
--- a/gcc/testsuite/gcc.target/i386/pr90773-22.c
+++ b/gcc/testsuite/gcc.target/i386/pr90773-22.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=skylake" } */
+/* { dg-options "-O2 -march=skylake -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pr90773-23.c b/gcc/testsuite/gcc.target/i386/pr90773-23.c
index 9256ce1..ca4a86f 100644
--- a/gcc/testsuite/gcc.target/i386/pr90773-23.c
+++ b/gcc/testsuite/gcc.target/i386/pr90773-23.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=skylake" } */
+/* { dg-options "-O2 -march=skylake -mtune-ctrl=avx256_store_by_pieces" } */
 
 extern char *dst;
 
diff --git a/gcc/testsuite/gcc.target/i386/pr90773-26.c b/gcc/testsuite/gcc.target/i386/pr90773-26.c
index b2513c3..76fb79f 100644
--- a/gcc/testsuite/gcc.target/i386/pr90773-26.c
+++ b/gcc/testsuite/gcc.target/i386/pr90773-26.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -march=skylake" } */
+/* { dg-options "-O2 -march=skylake -mtune-ctrl=avx256_move_by_pieces" } */
 
 struct S
 {