Enable afdo testing on AMD Zen3+

contrib/ChangeLog:

	* gen_autofdo_event.py: Add support for AMD Zen 3 and
	later CPUs.

gcc/ChangeLog:

	* config/i386/gcc-auto-profile: regenerate.

contrib/gen_autofdo_event.py

@@ -138,8 +138,16 @@ if [ "$1" = "--all" ] ; then
   shift
 fi
 
-if ! grep -q Intel /proc/cpuinfo ; then
-  echo >&2 "Only Intel CPUs supported"
+if grep -q AuthenticAMD /proc/cpuinfo ; then
+  vendor=AMD
+  if ! grep -q " brs" /proc/cpuinfo && ! grep -q amd_lbr_v2 /proc/cpuinfo ; then
+    echo >&2 "AMD CPU with brs (Zen 3) or amd_lbr_v2 (Zen 4+) feature is required"
+    exit 1
+  fi
+elif grep -q Intel /proc/cpuinfo ; then
+  vendor=Intel
+else
+  echo >&2 "Only AMD and Intel CPUs supported"
   exit 1
 fi
 
@@ -147,7 +155,7 @@ if grep -q hypervisor /proc/cpuinfo ; then
   echo >&2 "Warning: branch profiling may not be functional in VMs"
 fi
 
-case `grep -E -q "^cpu family\s*: 6" /proc/cpuinfo &&
+case `test $vendor = Intel && grep -E -q "^cpu family\s*: 6" /proc/cpuinfo &&
   grep -E "^model\s*:" /proc/cpuinfo | head -n1` in''')
     for event, mod in eventmap.items():
         for m in mod[:-1]:
@@ -156,8 +164,13 @@ case `grep -E -q "^cpu family\s*: 6" /proc/cpuinfo &&
     print(r'''*)
         if perf list br_inst_retired | grep -q br_inst_retired.near_taken ; then
             E=br_inst_retired.near_taken:p
+        elif perf list ex_ret_brn_tkn | grep -q ex_ret_brn_tkn ; then
+            E=ex_ret_brn_tkn:P$FLAGS
+        elif $vendor = Intel ; then
+echo >&2 "Unknown Intel CPU. Run contrib/gen_autofdo_event.py --all --script to update script."
+	  exit 1
         else
-echo >&2 "Unknown CPU. Run contrib/gen_autofdo_event.py --all --script to update script."
+echo >&2 "AMD CPU without support for ex_ret_brn_tkn event"
 	  exit 1
         fi ;;''')
     print(r"esac")

gcc/config/i386/gcc-auto-profile

@@ -24,8 +24,16 @@ if [ "$1" = "--all" ] ; then
   shift
 fi
 
-if ! grep -q Intel /proc/cpuinfo ; then
-  echo >&2 "Only Intel CPUs supported"
+if grep -q AuthenticAMD /proc/cpuinfo ; then
+  vendor=AMD
+  if ! grep -q " brs" /proc/cpuinfo && ! grep -q amd_lbr_v2 /proc/cpuinfo ; then
+    echo >&2 "AMD CPU with brs (Zen 3) or amd_lbr_v2 (Zen 4+) feature is required"
+    exit 1
+  fi
+elif grep -q Intel /proc/cpuinfo ; then
+  vendor=Intel
+else
+  echo >&2 "Only AMD and Intel CPUs supported"
   exit 1
 fi
 
@@ -33,7 +41,7 @@ if grep -q hypervisor /proc/cpuinfo ; then
   echo >&2 "Warning: branch profiling may not be functional in VMs"
 fi
 
-case `grep -E -q "^cpu family\s*: 6" /proc/cpuinfo &&
+case `test $vendor = Intel && grep -E -q "^cpu family\s*: 6" /proc/cpuinfo &&
   grep -E "^model\s*:" /proc/cpuinfo | head -n1` in
 model*:\ 46|\
 model*:\ 30|\
@@ -82,6 +90,8 @@ model*:\ 126|\
 model*:\ 167|\
 model*:\ 140|\
 model*:\ 141|\
+model*:\ 143|\
+model*:\ 207|\
 model*:\ 106|\
 model*:\ 108|\
 model*:\ 173|\
@@ -89,15 +99,20 @@ model*:\ 174) E="cpu/event=0xc4,umask=0x20/$FLAGS" ;;
 model*:\ 134|\
 model*:\ 150|\
 model*:\ 156) E="cpu/event=0xc4,umask=0xfe/p$FLAGS" ;;
-model*:\ 143|\
-model*:\ 207) E="cpu/event=0xc4,umask=0x20/p$FLAGS" ;;
-model*:\ 190) E="cpu/event=0xc4,umask=0xc0/$FLAGS" ;;
+model*:\ 190|\
+model*:\ 175|\
+model*:\ 182) E="cpu/event=0xc4,umask=0xc0/$FLAGS" ;;
 model*:\ 190) E="cpu/event=0xc4,umask=0xfe/$FLAGS" ;;
 *)
         if perf list br_inst_retired | grep -q br_inst_retired.near_taken ; then
             E=br_inst_retired.near_taken:p
+        elif perf list ex_ret_brn_tkn | grep -q ex_ret_brn_tkn ; then
+            E=ex_ret_brn_tkn:P$FLAGS
+        elif $vendor = Intel ; then
+echo >&2 "Unknown Intel CPU. Run contrib/gen_autofdo_event.py --all --script to update script."
+	  exit 1
         else
-echo >&2 "Unknown CPU. Run contrib/gen_autofdo_event.py --all --script to update script."
+echo >&2 "AMD CPU without support for ex_ret_brn_tkn event"
 	  exit 1
         fi ;;
 esac