Add -march=gfx906 for AMD GCN.

2019-06-06  Andrew Stubbs  <ams@codesourcery.com>

	gcc/
	* config.gcc (amdgcn-*-*): Allow --with-arch=gfx906.
	* config/gcn/gcn.opt (gpu_type): Add gfx906.
	* config/gcn/t-gcn-hsa (MULTILIB_OPTIONS): Add gfx906 multilib.
	(MULTILIB_DIRNAMES): Rename gcn5 to gfx900.
	Add gfx906.

From-SVN: r272007

gcc/ChangeLog

+2019-06-06  Andrew Stubbs  <ams@codesourcery.com>
+
+	* config.gcc (amdgcn-*-*): Allow --with-arch=gfx906.
+	* config/gcn/gcn.opt (gpu_type): Add gfx906.
+	* config/gcn/t-gcn-hsa (MULTILIB_OPTIONS): Add gfx906 multilib.
+	(MULTILIB_DIRNAMES): Rename gcn5 to gfx900.
+	Add gfx906.
+
 2019-06-06  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	PR tree-optimization/90332

gcc/config.gcc

@@ -4127,7 +4127,7 @@ case "${target}" in
 		for which in arch tune; do
 			eval "val=\$with_$which"
 			case ${val} in
-			"" | carrizo | fiji | gfx900 )
+			"" | carrizo | fiji | gfx900 | gfx906 )
 				# OK
 				;;
 			*)

gcc/config/gcn/gcn.opt

@@ -34,6 +34,9 @@ Enum(gpu_type) String(fiji) Value(PROCESSOR_FIJI)
 EnumValue
 Enum(gpu_type) String(gfx900) Value(PROCESSOR_VEGA)
 
+EnumValue
+Enum(gpu_type) String(gfx906) Value(PROCESSOR_VEGA)
+
 march=
 Target RejectNegative Joined ToLower Enum(gpu_type) Var(gcn_arch) Init(PROCESSOR_CARRIZO)
 Specify the name of the target GPU.

gcc/config/gcn/t-gcn-hsa

@@ -42,8 +42,8 @@ ALL_HOST_OBJS += gcn-run.o
 gcn-run$(exeext): gcn-run.o
 	+$(LINKER) $(ALL_LINKERFLAGS) $(LDFLAGS) -o $@ $< -ldl
 
-MULTILIB_OPTIONS = march=gfx900
-MULTILIB_DIRNAMES = gcn5
+MULTILIB_OPTIONS = march=gfx900 march=gfx906
+MULTILIB_DIRNAMES = gfx900 gfx906
 
 PASSES_EXTRA += $(srcdir)/config/gcn/gcn-passes.def
 gcn-tree.o: $(srcdir)/config/gcn/gcn-tree.c