[RISCV] Zicfilp implies Zicsr. (#93143)

The Zicfilp extension depends on the Zicsr extension.
Ref: https://github.com/riscv/riscv-cfi/blob/main/src/cfi_forward.adoc

Author: yetingk

llvm/lib/Target/RISCV/RISCVFeatures.td

@@ -152,7 +152,8 @@ def HasStdExtZimop : Predicate<"Subtarget->hasStdExtZimop()">,
 
 def FeatureStdExtZicfilp
     : RISCVExperimentalExtension<"zicfilp", 0, 4,
-                                 "'Zicfilp' (Landing pad)">;
+                                 "'Zicfilp' (Landing pad)",
+                                 [FeatureStdExtZicsr]>;
 def HasStdExtZicfilp : Predicate<"Subtarget->hasStdExtZicfilp()">,
                        AssemblerPredicate<(all_of FeatureStdExtZicfilp),
                                           "'Zicfilp' (Landing pad)">;

llvm/test/CodeGen/RISCV/attributes.ll

@@ -389,7 +389,7 @@
 ; RV32ZACAS: .attribute 5, "rv32i2p1_a2p1_zacas1p0"
 ; RV32ZALASR: .attribute 5, "rv32i2p1_zalasr0p1"
 ; RV32ZAMA16B: .attribute 5, "rv32i2p1_zama16b1p0"
-; RV32ZICFILP: .attribute 5, "rv32i2p1_zicfilp0p4"
+; RV32ZICFILP: .attribute 5, "rv32i2p1_zicfilp0p4_zicsr2p0"
 ; RV32ZABHA: .attribute 5, "rv32i2p1_a2p1_zabha1p0"
 ; RV32SSNPM: .attribute 5, "rv32i2p1_ssnpm0p8"
 ; RV32SMNPM: .attribute 5, "rv32i2p1_smnpm0p8"
@@ -520,7 +520,7 @@
 ; RV64ZVFBFWMA: .attribute 5, "rv64i2p1_f2p2_zicsr2p0_zfbfmin1p0_zve32f1p0_zve32x1p0_zvfbfmin1p0_zvfbfwma1p0_zvl32b1p0"
 ; RV64ZACAS: .attribute 5, "rv64i2p1_a2p1_zacas1p0"
 ; RV64ZALASR: .attribute 5, "rv64i2p1_zalasr0p1"
-; RV64ZICFILP: .attribute 5, "rv64i2p1_zicfilp0p4"
+; RV64ZICFILP: .attribute 5, "rv64i2p1_zicfilp0p4_zicsr2p0"
 ; RV64ZABHA: .attribute 5, "rv64i2p1_a2p1_zabha1p0"
 ; RV64SSNPM: .attribute 5, "rv64i2p1_ssnpm0p8"
 ; RV64SMNPM: .attribute 5, "rv64i2p1_smnpm0p8"

llvm/test/MC/RISCV/attribute-arch.s

@@ -397,7 +397,7 @@
 # CHECK: attribute      5, "rv32i2p1_xcvbi1p0"
 
 .attribute arch, "rv32i_zicfilp0p4"
-# CHECK: attribute      5, "rv32i2p1_zicfilp0p4"
+# CHECK: attribute      5, "rv32i2p1_zicfilp0p4_zicsr2p0"
 
 .attribute arch, "rv32i_zicfiss0p4"
 # CHECK: .attribute     5, "rv32i2p1_zicfiss0p4_zicsr2p0_zimop1p0"