[Patch AArch64 1/4] Define candidates for instruction fusion in a .def file

gcc/

	* config/aarch64/aarch64-fusion-pairs.def: New.
	* config/aarch64/aarch64-protos.h (aarch64_fusion_pairs): New.
	* config/aarch64/aarch64.c (AARCH64_FUSE_NOTHING): Move to
	aarch64_fusion_pairs.
	(AARCH64_FUSE_MOV_MOVK): Likewise.
	(AARCH64_FUSE_ADRP_ADD): Likewise.
	(AARCH64_FUSE_MOVK_MOVK): Likewise.
	(AARCH64_FUSE_ADRP_LDR): Likewise.
	(AARCH64_FUSE_CMP_BRANCH): Likewise.

From-SVN: r225014

4 files changed, 70 insertions, 7 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c508303..0d81aa7 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,15 @@
+2015-06-26  James Greenhalgh  <james.greenhalgh@arm.com>
+
+	* config/aarch64/aarch64-fusion-pairs.def: New.
+	* config/aarch64/aarch64-protos.h (aarch64_fusion_pairs): New.
+	* config/aarch64/aarch64.c (AARCH64_FUSE_NOTHING): Move to
+	aarch64_fusion_pairs.
+	(AARCH64_FUSE_MOV_MOVK): Likewise.
+	(AARCH64_FUSE_ADRP_ADD): Likewise.
+	(AARCH64_FUSE_MOVK_MOVK): Likewise.
+	(AARCH64_FUSE_ADRP_LDR): Likewise.
+	(AARCH64_FUSE_CMP_BRANCH): Likewise.
+
 2015-06-26  Jiong Wang  <jiong.wang@arm.com>
 
 	* config/aarch64/aarch64-protos.h (aarch64_symbol_type): Rename
diff --git a/gcc/config/aarch64/aarch64-fusion-pairs.def b/gcc/config/aarch64/aarch64-fusion-pairs.def
new file mode 100644
index 0000000..a7b00f6
--- /dev/null
+++ b/gcc/config/aarch64/aarch64-fusion-pairs.def
@@ -0,0 +1,38 @@
+/* Copyright (C) 2015 Free Software Foundation, Inc.
+   Contributed by ARM Ltd.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3, or (at your
+   option) any later version.
+
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+/* Pairs of instructions which can be fused. before including this file,
+   define a macro:
+
+     AARCH64_FUSION_PAIR (name, internal_name, index_bit)
+
+   Where:
+
+     NAME is a string giving a friendly name for the instructions to fuse.
+     INTERNAL_NAME gives the internal name suitable for appending to
+     AARCH64_FUSE_ to give an enum name.
+     INDEX_BIT is the bit to set in the bitmask of supported fusion
+     operations.  */
+
+AARCH64_FUSION_PAIR ("mov+movk", MOV_MOVK, 0)
+AARCH64_FUSION_PAIR ("adrp+add", ADRP_ADD, 1)
+AARCH64_FUSION_PAIR ("movk+movk", MOVK_MOVK, 2)
+AARCH64_FUSION_PAIR ("adrp+ldr", ADRP_LDR, 3)
+AARCH64_FUSION_PAIR ("cmp+branch", CMP_BRANCH, 4)
+
diff --git a/gcc/config/aarch64/aarch64-protos.h b/gcc/config/aarch64/aarch64-protos.h
index 249a701..804aae4 100644
--- a/gcc/config/aarch64/aarch64-protos.h
+++ b/gcc/config/aarch64/aarch64-protos.h
@@ -190,6 +190,26 @@ struct tune_params
   const int min_div_recip_mul_df;
 };
 
+#define AARCH64_FUSION_PAIR(x, name, index) \
+  AARCH64_FUSE_##name = (1 << index),
+/* Supported fusion operations.  */
+enum aarch64_fusion_pairs
+{
+  AARCH64_FUSE_NOTHING = 0,
+#include "aarch64-fusion-pairs.def"
+
+/* Hacky macro to build AARCH64_FUSE_ALL.  The sequence below expands
+   to:
+   AARCH64_FUSE_ALL = 0 | AARCH64_FUSE_index1 | AARCH64_FUSE_index2 ...  */
+#undef AARCH64_FUSION_PAIR
+#define AARCH64_FUSION_PAIR(x, name, y) \
+  | AARCH64_FUSE_##name
+
+  AARCH64_FUSE_ALL = 0
+#include "aarch64-fusion-pairs.def"
+};
+#undef AARCH64_FUSION_PAIR
+
 HOST_WIDE_INT aarch64_initial_elimination_offset (unsigned, unsigned);
 int aarch64_get_condition_code (rtx);
 bool aarch64_bitmask_imm (HOST_WIDE_INT val, machine_mode);
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 67e21c8..88438b7 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -321,13 +321,6 @@ static const struct cpu_vector_cost xgene1_vector_cost =
   1 /* cond_not_taken_branch_cost  */
 };
 
-#define AARCH64_FUSE_NOTHING	(0)
-#define AARCH64_FUSE_MOV_MOVK	(1 << 0)
-#define AARCH64_FUSE_ADRP_ADD	(1 << 1)
-#define AARCH64_FUSE_MOVK_MOVK	(1 << 2)
-#define AARCH64_FUSE_ADRP_LDR	(1 << 3)
-#define AARCH64_FUSE_CMP_BRANCH	(1 << 4)
-
 /* Generic costs for branch instructions.  */
 static const struct cpu_branch_cost generic_branch_cost =
 {