[llvm] [RISCV] Zicfilp implies Zicsr. (PR #93143)

[Yeting Kuo via llvm-commits]

https://github.com/yetingk created https://github.com/llvm/llvm-project/pull/93143

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

>From 1de11f42ebaa3f69968bc7d850cc067cf6101d49 Mon Sep 17 00:00:00 2001
From: Yeting Kuo <yeting.kuo at sifive.com>
Date: Wed, 22 May 2024 23:37:32 -0700
Subject: [PATCH] [RISCV] Zicfilp implies Zicsr.

The Zicfilp extension depends on the Zicsr extension.
Ref: https://github.com/riscv/riscv-cfi/blob/main/src/cfi_forward.adoc
---
 llvm/lib/Target/RISCV/RISCVFeatures.td | 3 ++-
 llvm/test/CodeGen/RISCV/attributes.ll  | 4 ++--
 llvm/test/MC/RISCV/attribute-arch.s    | 2 +-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/llvm/lib/Target/RISCV/RISCVFeatures.td b/llvm/lib/Target/RISCV/RISCVFeatures.td
index b099496d18388..a78d78946be31 100644
--- a/llvm/lib/Target/RISCV/RISCVFeatures.td
+++ b/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)">;
diff --git a/llvm/test/CodeGen/RISCV/attributes.ll b/llvm/test/CodeGen/RISCV/attributes.ll
index a1eb17956b825..c90bb031e082f 100644
--- a/llvm/test/CodeGen/RISCV/attributes.ll
+++ b/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"
diff --git a/llvm/test/MC/RISCV/attribute-arch.s b/llvm/test/MC/RISCV/attribute-arch.s
index a028d4025ec1a..0e5eddd83e408 100644
--- a/llvm/test/MC/RISCV/attribute-arch.s
+++ b/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"