Enable instruction fusion of AES instructions on ARM for Cortex-A53 and

Cortex-A57.

    gcc/
        * config/arm/arm.c (arm_cortex_a53_tune): Enable AES fusion.
        (arm_cortex_a57_tune): Likewise.
        (aarch_macro_fusion_pair_p): Add support for AES fusion.
        * config/arm/arm-protos.h (fuse_ops): Add FUSE_AES_AESMC

From-SVN: r233266

gcc/ChangeLog

+2016-02-10  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	* config/arm/arm.c (arm_cortex_a53_tune): Enable AES fusion.
+	(arm_cortex_a57_tune): Likewise.
+	(aarch_macro_fusion_pair_p): Add support for AES fusion.
+	* config/arm/arm-protos.h (fuse_ops): Add FUSE_AES_AESMC.
+
 2016-02-10  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* timevar.def (TV_PHASE_DBGINFO): Delete.

gcc/config/arm/arm-protos.h

@@ -300,8 +300,9 @@ struct tune_params
   enum fuse_ops
   {
     FUSE_NOTHING   = 0,
-    FUSE_MOVW_MOVT = 1 << 0
-  } fusible_ops: 1;
+    FUSE_MOVW_MOVT = 1 << 0,
+    FUSE_AES_AESMC = 1 << 1
+  } fusible_ops: 2;
   /* Depth of scheduling queue to check for L2 autoprefetcher.  */
   enum {SCHED_AUTOPREF_OFF, SCHED_AUTOPREF_RANK, SCHED_AUTOPREF_FULL}
     sched_autopref: 2;

gcc/config/arm/arm.c

@@ -1982,7 +1982,7 @@ const struct tune_params arm_cortex_a53_tune =
   tune_params::DISPARAGE_FLAGS_NEITHER,
   tune_params::PREF_NEON_64_FALSE,
   tune_params::PREF_NEON_STRINGOPS_TRUE,
-  FUSE_OPS (tune_params::FUSE_MOVW_MOVT),
+  FUSE_OPS (tune_params::FUSE_MOVW_MOVT | tune_params::FUSE_AES_AESMC),
   tune_params::SCHED_AUTOPREF_OFF
 };
 
@@ -2005,7 +2005,7 @@ const struct tune_params arm_cortex_a57_tune =
   tune_params::DISPARAGE_FLAGS_ALL,
   tune_params::PREF_NEON_64_FALSE,
   tune_params::PREF_NEON_STRINGOPS_TRUE,
-  FUSE_OPS (tune_params::FUSE_MOVW_MOVT),
+  FUSE_OPS (tune_params::FUSE_MOVW_MOVT | tune_params::FUSE_AES_AESMC),
   tune_params::SCHED_AUTOPREF_FULL
 };
 
@@ -29683,6 +29683,10 @@ aarch_macro_fusion_pair_p (rtx_insn* prev, rtx_insn* curr)
   if (!arm_macro_fusion_p ())
     return false;
 
+  if (current_tune->fusible_ops & tune_params::FUSE_AES_AESMC
+      && aarch_crypto_can_dual_issue (prev, curr))
+    return true;
+
   if (current_tune->fusible_ops & tune_params::FUSE_MOVW_MOVT)
     {
       /* We are trying to fuse