[RISCV] Add Zic64b, Ziccamoa, Ziccif, Zicclsm, Ziccrse, and Za64rs to sifive-p450. (llvm#79030)

Author: topperc

clang/test/Driver/riscv-cpus.c

@@ -228,14 +228,20 @@
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+f"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+d"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+c"
+// MCPU-SIFIVE-P450-SAME: "-target-feature" "+zic64b"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+zicbom"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+zicbop"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+zicboz"
+// MCPU-SIFIVE-P450-SAME: "-target-feature" "+ziccamoa"
+// MCPU-SIFIVE-P450-SAME: "-target-feature" "+ziccif"
+// MCPU-SIFIVE-P450-SAME: "-target-feature" "+zicclsm"
+// MCPU-SIFIVE-P450-SAME: "-target-feature" "+ziccrse"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+zicsr"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+zifencei"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+zihintntl"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+zihintpause"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+zihpm"
+// MCPU-SIFIVE-P450-SAME: "-target-feature" "+za64rs"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+zfhmin"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+zba"
 // MCPU-SIFIVE-P450-SAME: "-target-feature" "+zbb"

llvm/lib/Target/RISCV/RISCVProcessors.td

@@ -223,9 +223,15 @@ def SIFIVE_P450 : RISCVProcessorModel<"sifive-p450", SiFiveP400Model,
                                        FeatureStdExtF,
                                        FeatureStdExtD,
                                        FeatureStdExtC,
+                                       FeatureStdExtZa64rs,
+                                       FeatureStdExtZic64b,
                                        FeatureStdExtZicbop,
                                        FeatureStdExtZicbom,
                                        FeatureStdExtZicboz,
+                                       FeatureStdExtZiccamoa,
+                                       FeatureStdExtZiccif,
+                                       FeatureStdExtZicclsm,
+                                       FeatureStdExtZiccrse,
                                        FeatureStdExtZihintntl,
                                        FeatureStdExtZihintpause,
                                        FeatureStdExtZihpm,