MIPS: Add i6500 processor as an alias for i6400.

gcc/ChangeLog:

2018-06-12  Matthew Fortune  <mfortune@gmail.com>

	* config/mips/mips-cpus.def: New MIPS_CPU for i6500.
	* config/mips/mips-tables.opt: Regenerate.
	* config/mips/mips.h (MIPS_ISA_LEVEL_SPEC): Mark i6500 as
	mips64r6.
	* doc/invoke.texi: Document -march=i6500.

From-SVN: r261490

gcc/ChangeLog

+2018-06-12  Matthew Fortune  <mfortune@gmail.com>
+
+	* config/mips/mips-cpus.def: New MIPS_CPU for i6500.
+	* config/mips/mips-tables.opt: Regenerate.
+	* config/mips/mips.h (MIPS_ISA_LEVEL_SPEC): Mark i6500 as
+	mips64r6.
+	* doc/invoke.texi: Document -march=i6500.
+
 2018-06-12  Prachi Godbole  <prachi.godbole@imgtec.com>
 
 	* config/mips/i6400.md (i6400_gpmuldiv): Remove cpu_unit.

gcc/config/mips/mips-cpus.def

@@ -171,3 +171,4 @@ MIPS_CPU ("xlp", PROCESSOR_XLP, 65, PTF_AVOID_BRANCHLIKELY_SPEED)
 
 /* MIPS64 Release 6 processors.  */
 MIPS_CPU ("i6400", PROCESSOR_I6400, 69, 0)
+MIPS_CPU ("i6500", PROCESSOR_I6400, 69, 0)

gcc/config/mips/mips-tables.opt

@@ -696,3 +696,6 @@ Enum(mips_arch_opt_value) String(xlp) Value(101) Canonical
 EnumValue
 Enum(mips_arch_opt_value) String(i6400) Value(102) Canonical
 
+EnumValue
+Enum(mips_arch_opt_value) String(i6500) Value(103) Canonical
+

gcc/config/mips/mips.h

@@ -782,7 +782,7 @@ struct mips_cpu_info {
      %{march=mips64r2|march=loongson3a|march=octeon|march=xlp: -mips64r2} \
      %{march=mips64r3: -mips64r3} \
      %{march=mips64r5: -mips64r5} \
-     %{march=mips64r6|march=i6400: -mips64r6}}"
+     %{march=mips64r6|march=i6400|march=i6500: -mips64r6}}"
 
 /* A spec that injects the default multilib ISA if no architecture is
    specified.  */

gcc/doc/invoke.texi

@@ -20099,7 +20099,7 @@ The processor names are:
 @samp{34kc}, @samp{34kf2_1}, @samp{34kf1_1}, @samp{34kn},
 @samp{74kc}, @samp{74kf2_1}, @samp{74kf1_1}, @samp{74kf3_2},
 @samp{1004kc}, @samp{1004kf2_1}, @samp{1004kf1_1},
-@samp{i6400},
+@samp{i6400}, @samp{i6500},
 @samp{interaptiv},
 @samp{loongson2e}, @samp{loongson2f}, @samp{loongson3a},
 @samp{m4k},