Add initial octeontx2 support.

This adds octeontx2 naming.  It currently uses the cortexa57
cost model and schedule model until I submit this.  This is
more a place holder to get the naming of the cores in GCC 10.
I will submit the cost model in the next couple of days.

ChangeLog:
* config/aarch64/aarch64-cores.def (octeontx2): New define.
(octeontx2t98): New define.
(octeontx2t96): New define.
(octeontx2t93): New define.
(octeontx2f95): New define.
(octeontx2f95n): New define.
(octeontx2f95mm): New define.
* config/aarch64/aarch64-tune.md: Regenerate.
* doc/invoke.texi (-mcpu=): Document the new cpu types.

gcc/ChangeLog

+2020-01-13  Andrew Pinski  <apinski@marvell.com>
+
+	* config/aarch64/aarch64-cores.def (octeontx2): New define.
+	(octeontx2t98): New define.
+	(octeontx2t96): New define.
+	(octeontx2t93): New define.
+	(octeontx2f95): New define.
+	(octeontx2f95n): New define.
+	(octeontx2f95mm): New define.
+	* config/aarch64/aarch64-tune.md: Regenerate.
+	* doc/invoke.texi (-mcpu=): Document the new cpu types.
+
 2020-01-13  Jason Merrill  <jason@redhat.com>
 
 	PR c++/33799 - destroy return value if local cleanup throws.

gcc/config/aarch64/aarch64-cores.def

@@ -109,6 +109,16 @@ AARCH64_CORE("ares",  ares, cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_F
 AARCH64_CORE("neoverse-n1",  neoversen1, cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_F16 | AARCH64_FL_RCPC | AARCH64_FL_DOTPROD | AARCH64_FL_PROFILE, neoversen1, 0x41, 0xd0c, -1)
 AARCH64_CORE("neoverse-e1",  neoversee1, cortexa53, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_F16 | AARCH64_FL_RCPC | AARCH64_FL_DOTPROD | AARCH64_FL_SSBS, cortexa73, 0x41, 0xd4a, -1)
 
+/* Cavium ('C') cores. */
+AARCH64_CORE("octeontx2",      octeontx2,      cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_CRYPTO | AARCH64_FL_PROFILE, cortexa57, 0x43, 0x0b0, -1)
+AARCH64_CORE("octeontx2t98",   octeontx2t98,   cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_CRYPTO | AARCH64_FL_PROFILE, cortexa57, 0x43, 0x0b1, -1)
+AARCH64_CORE("octeontx2t96",   octeontx2t96,   cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_CRYPTO | AARCH64_FL_PROFILE, cortexa57, 0x43, 0x0b2, -1)
+/* Note OcteonTX2 T93 is an alias to OcteonTX2 T96. */
+AARCH64_CORE("octeontx2t93",   octeontx2t93,   cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_CRYPTO | AARCH64_FL_PROFILE, cortexa57, 0x43, 0x0b2, -1)
+AARCH64_CORE("octeontx2f95",   octeontx2f95,   cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_CRYPTO | AARCH64_FL_PROFILE, cortexa57, 0x43, 0x0b3, -1)
+AARCH64_CORE("octeontx2f95n",  octeontx2f95n,  cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_CRYPTO | AARCH64_FL_PROFILE, cortexa57, 0x43, 0x0b4, -1)
+AARCH64_CORE("octeontx2f95mm", octeontx2f95mm, cortexa57, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_CRYPTO | AARCH64_FL_PROFILE, cortexa57, 0x43, 0x0b5, -1)
+
 /* HiSilicon ('H') cores. */
 AARCH64_CORE("tsv110",  tsv110, tsv110, 8_2A,  AARCH64_FL_FOR_ARCH8_2 | AARCH64_FL_CRYPTO | AARCH64_FL_F16 | AARCH64_FL_AES | AARCH64_FL_SHA2, tsv110,   0x48, 0xd01, -1)
 

gcc/config/aarch64/aarch64-tune.md

 ;; -*- buffer-read-only: t -*-
 ;; Generated automatically by gentune.sh from aarch64-cores.def
 (define_attr "tune"
-	"cortexa34,cortexa35,cortexa53,cortexa57,cortexa72,cortexa73,thunderx,thunderxt88p1,thunderxt88,octeontx,octeontxt81,octeontxt83,thunderxt81,thunderxt83,emag,xgene1,falkor,qdf24xx,exynosm1,phecda,thunderx2t99p1,vulcan,thunderx2t99,cortexa55,cortexa75,cortexa76,cortexa76ae,cortexa77,cortexa65,cortexa65ae,ares,neoversen1,neoversee1,tsv110,saphira,cortexa57cortexa53,cortexa72cortexa53,cortexa73cortexa35,cortexa73cortexa53,cortexa75cortexa55,cortexa76cortexa55"
+	"cortexa34,cortexa35,cortexa53,cortexa57,cortexa72,cortexa73,thunderx,thunderxt88p1,thunderxt88,octeontx,octeontxt81,octeontxt83,thunderxt81,thunderxt83,emag,xgene1,falkor,qdf24xx,exynosm1,phecda,thunderx2t99p1,vulcan,thunderx2t99,cortexa55,cortexa75,cortexa76,cortexa76ae,cortexa77,cortexa65,cortexa65ae,ares,neoversen1,neoversee1,octeontx2,octeontx2t98,octeontx2t96,octeontx2t93,octeontx2f95,octeontx2f95n,octeontx2f95mm,tsv110,saphira,cortexa57cortexa53,cortexa72cortexa53,cortexa73cortexa35,cortexa73cortexa53,cortexa75cortexa55,cortexa76cortexa55"
 	(const (symbol_ref "((enum attr_tune) aarch64_tune)")))

gcc/doc/invoke.texi

@@ -16328,7 +16328,11 @@ performance of the code.  Permissible values for this option are:
 @samp{ares}, @samp{exynos-m1}, @samp{emag}, @samp{falkor},
 @samp{neoverse-e1},@samp{neoverse-n1},@samp{qdf24xx}, @samp{saphira},
 @samp{phecda}, @samp{xgene1}, @samp{vulcan}, @samp{octeontx},
-@samp{octeontx81},  @samp{octeontx83}, @samp{thunderx}, @samp{thunderxt88},
+@samp{octeontx81},  @samp{octeontx83},
+@samp{octeontx2}, @samp{octeontx2t98}, @samp{octeontx2t96}
+@samp{octeontx2t93}, @samp{octeontx2f95}, @samp{octeontx2f95n},
+@samp{octeontx2f95mm}
+@samp{thunderx}, @samp{thunderxt88},
 @samp{thunderxt88p1}, @samp{thunderxt81}, @samp{tsv110},
 @samp{thunderxt83}, @samp{thunderx2t99},
 @samp{cortex-a57.cortex-a53}, @samp{cortex-a72.cortex-a53},