diff --git a/gcc/config/aarch64/aarch64-fusion-pairs.def b/gcc/config/aarch64/aarch64-fusion-pairs.def
index a7b00f6..53bbef4 100644
--- a/gcc/config/aarch64/aarch64-fusion-pairs.def
+++ b/gcc/config/aarch64/aarch64-fusion-pairs.def
@@ -20,19 +20,17 @@
 /* Pairs of instructions which can be fused. before including this file,
    define a macro:
 
-     AARCH64_FUSION_PAIR (name, internal_name, index_bit)
+     AARCH64_FUSION_PAIR (name, internal_name)
 
    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)
+     AARCH64_FUSE_ to give an enum name. */
+
+AARCH64_FUSION_PAIR ("mov+movk", MOV_MOVK)
+AARCH64_FUSION_PAIR ("adrp+add", ADRP_ADD)
+AARCH64_FUSION_PAIR ("movk+movk", MOVK_MOVK)
+AARCH64_FUSION_PAIR ("adrp+ldr", ADRP_LDR)
+AARCH64_FUSION_PAIR ("cmp+branch", CMP_BRANCH)
 
diff --git a/gcc/config/aarch64/aarch64-protos.h b/gcc/config/aarch64/aarch64-protos.h
index 0b09d49..057d4fc 100644
--- a/gcc/config/aarch64/aarch64-protos.h
+++ b/gcc/config/aarch64/aarch64-protos.h
@@ -201,23 +201,24 @@ struct tune_params
   unsigned int extra_tuning_flags;
 };
 
-#define AARCH64_FUSION_PAIR(x, name, index) \
-  AARCH64_FUSE_##name = (1 << index),
+#define AARCH64_FUSION_PAIR(x, name) \
+  AARCH64_FUSE_##name##_index, 
 /* Supported fusion operations.  */
-enum aarch64_fusion_pairs
+enum aarch64_fusion_pairs_index
 {
-  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 ...  */
+  AARCH64_FUSE_index_END
+};
 #undef AARCH64_FUSION_PAIR
-#define AARCH64_FUSION_PAIR(x, name, y) \
-  | AARCH64_FUSE_##name
 
-  AARCH64_FUSE_ALL = 0
+#define AARCH64_FUSION_PAIR(x, name) \
+  AARCH64_FUSE_##name = (1u << AARCH64_FUSE_##name##_index),
+/* Supported fusion operations.  */
+enum aarch64_fusion_pairs
+{
+  AARCH64_FUSE_NOTHING = 0,
 #include "aarch64-fusion-pairs.def"
+  AARCH64_FUSE_ALL = (1u << AARCH64_FUSE_index_END) - 1
 };
 #undef AARCH64_FUSION_PAIR
 
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index aa268ae..162e25e 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -172,7 +172,7 @@ struct aarch64_flag_desc
   unsigned int flag;
 };
 
-#define AARCH64_FUSION_PAIR(name, internal_name, y) \
+#define AARCH64_FUSION_PAIR(name, internal_name) \
   { name, AARCH64_FUSE_##internal_name },
 static const struct aarch64_flag_desc aarch64_fusible_pairs[] =
 {