[RISCV] add svinval extension

[BeMg]

Summary

1. Add the svinval extension support
2. Add the svinval Predicates for its instruction

Note: the svinval instructions defined in https://reviews.llvm.org/D117654

[craig.topper]

llvm/lib/Target/RISCV/RISCVInstrInfo.td

814

Can we reorder these so there's aren't so many toggles of Predicates.

Alternatively, you could add Requires<[HasStdSvinval]> to the end of the lines instead of using let Predicates

[BeMg]

Use Requires<[HasStdSvinval]> instead of using let Predicates

[jrtc27]

Hm, we only have two uses of Requires currently, both of which aren't really for any good reason as far as I can see. It'd be better to keep things uniform with Predicates IMO.

[BeMg]

Reorder the def then use the same let Predicates

[reames]

Please update https://llvm.org/docs/RISCVUsage.html#extensions

It seems like we'd previously accept these instruction without the extension being explicitly named? If so, this is probably worth a release note to document the change in user behavior.

[BeMg]

Update RISCVUsage.html

[reames]

llvm/docs/RISCVUsage.rst

56 ↗

(On Diff #470428)

This table is sorted alphabetically, please move above V.

[BeMg]

Update RISCVUsage.rst

[BeMg]

rebase

[reames]

LGTM

clang/test/Preprocessor/riscv-target-features.c

 // CHECK-NOT: __riscv_zknh
 // CHECK-NOT: __riscv_zksh
 // CHECK-NOT: __riscv_zksed
 // CHECK-NOT: __riscv_zkr
 // CHECK-NOT: __riscv_zkt
 // CHECK-NOT: __riscv_zk
 // CHECK-NOT: __riscv_zicbom
 // CHECK-NOT: __riscv_zicboz
+// CHECK-NOT: __riscv_svinval
 
 // RUN: %clang -target riscv32-unknown-linux-gnu -march=rv32im -x c -E -dM %s \
 // RUN: -o - | FileCheck --check-prefix=CHECK-M-EXT %s
 // RUN: %clang -target riscv64-unknown-linux-gnu -march=rv64im -x c -E -dM %s \
 // RUN: -o - | FileCheck --check-prefix=CHECK-M-EXT %s
 // CHECK-M-EXT: __riscv_div 1
 // CHECK-M-EXT: __riscv_m 2000000{{$}}
 // CHECK-M-EXT: __riscv_mul 1

 
 // RUN: %clang -target riscv32-unknown-linux-gnu -menable-experimental-extensions \
 // RUN: -march=rv32iztso0p1 -x c -E -dM %s \
 // RUN: -o - | FileCheck --check-prefix=CHECK-ZTSO-EXT %s
 // RUN: %clang -target riscv64-unknown-linux-gnu -menable-experimental-extensions \
 // RUN: -march=rv64iztso0p1 -x c -E -dM %s \
 // RUN: -o - | FileCheck --check-prefix=CHECK-ZTSO-EXT %s
 // CHECK-ZTSO-EXT: __riscv_ztso 1000{{$}}
+
+// RUN: %clang -target riscv32 -march=rv32isvinval -x c -E -dM %s \
+// RUN: -o - | FileCheck --check-prefix=CHECK-SVINVAL-EXT %s
+// RUN: %clang -target riscv64 -march=rv64isvinval -x c -E -dM %s \
+// RUN: -o - | FileCheck --check-prefix=CHECK-SVINVAL-EXT %s
+// CHECK-SVINVAL-EXT: __riscv_svinval 1000000{{$}}

llvm/lib/Support/RISCVISAInfo.cpp

static const RISCVSupportedExtension SupportedExtensions[] = {
     {"zve32f", RISCVExtensionVersion{1, 0}},
     {"zve64x", RISCVExtensionVersion{1, 0}},
     {"zve64f", RISCVExtensionVersion{1, 0}},
     {"zve64d", RISCVExtensionVersion{1, 0}},
 
     {"zicbom", RISCVExtensionVersion{1, 0}},
     {"zicboz", RISCVExtensionVersion{1, 0}},
     {"zicbop", RISCVExtensionVersion{1, 0}},
+
+    {"svinval", RISCVExtensionVersion{1, 0}},
 };
 
 static const RISCVSupportedExtension SupportedExperimentalExtensions[] = {
     {"zihintntl", RISCVExtensionVersion{0, 2}},
 
     {"zca", RISCVExtensionVersion{0, 70}},
     {"zvfh", RISCVExtensionVersion{0, 1}},
     {"zawrs", RISCVExtensionVersion{1, 0}},

llvm/lib/Target/RISCV/RISCV.td

 
 def FeatureStdExtZicbop
     : SubtargetFeature<"zicbop", "HasStdExtZicbop", "true",
                        "'Zicbop' (Cache-Block Prefetch Instructions)">;
 def HasStdExtZicbop : Predicate<"Subtarget->hasStdExtZicbop()">,
                                 AssemblerPredicate<(all_of FeatureStdExtZicbop),
                                 "'Zicbop' (Cache-Block Prefetch Instructions)">;
 
+def FeatureStdExtSvinval
+    : SubtargetFeature<"svinval", "HasStdExtSvinval", "true",
+                       "'Svinval' (Fine-Grained Address-Translation Cache Invalidation)">;
+def HasStdExtSvinval : Predicate<"Subtarget->hasStdExtSvinval()">,
+                                AssemblerPredicate<(all_of FeatureStdExtSvinval),
+                                "'Svinval' (Fine-Grained Address-Translation Cache Invalidation)">;
+
 def FeatureStdExtZtso
     : SubtargetFeature<"experimental-ztso", "HasStdExtZtso", "true",
                        "'Ztso' (Memory Model - Total Store Order)">;
 def HasStdExtZtso : Predicate<"Subtarget->hasStdExtZTso()">,
                               AssemblerPredicate<(all_of FeatureStdExtZtso),
                               "'Ztso' (Memory Model - Total Store Order)">;
 
 def FeatureStdExtZawrs

llvm/lib/Target/RISCV/RISCVInstrInfo.td

 } // isBarrier = 1, isReturn = 1, isTerminator = 1
 
 def WFI : Priv<"wfi", 0b0001000>, Sched<[]> {
   let rd = 0;
   let rs1 = 0;
   let rs2 = 0b00101;
 }
 
+let Predicates = [HasStdExtSvinval] in {
 def SFENCE_W_INVAL : Priv<"sfence.w.inval", 0b0001100>, Sched<[]> {
   let rd = 0;
   let rs1 = 0;
   let rs2 = 0;
 }
 
 def SFENCE_INVAL_IR : Priv<"sfence.inval.ir", 0b0001100>, Sched<[]> {
   let rd = 0;
   let rs1 = 0;
   let rs2 = 0b00001;
 }
+} // Predicates = [HasStdExtSvinval]
 
 def SFENCE_VMA  : Priv_rr<"sfence.vma", 0b0001001>, Sched<[]>;
+let Predicates = [HasStdExtSvinval] in {
 def SINVAL_VMA  : Priv_rr<"sinval.vma", 0b0001011>, Sched<[]>;
+} // Predicates = [HasStdExtSvinval]
 def HFENCE_VVMA : Priv_rr<"hfence.vvma", 0b0010001>, Sched<[]>;
 def HFENCE_GVMA : Priv_rr<"hfence.gvma", 0b0110001>, Sched<[]>;
+let Predicates = [HasStdExtSvinval] in {
 def HINVAL_VVMA : Priv_rr<"hinval.vvma", 0b0010011>, Sched<[]>;
 def HINVAL_GVMA : Priv_rr<"hinval.gvma", 0b0110011>, Sched<[]>;
+} // Predicates = [HasStdExtSvinval]
 
 def HLV_B   : HLoad_r<0b0110000, 0b00000, "hlv.b">, Sched<[]>;
 def HLV_BU  : HLoad_r<0b0110000, 0b00001, "hlv.bu">, Sched<[]>;
 def HLV_H   : HLoad_r<0b0110010, 0b00000, "hlv.h">, Sched<[]>;
 def HLV_HU  : HLoad_r<0b0110010, 0b00001, "hlv.hu">, Sched<[]>;
 def HLVX_HU : HLoad_r<0b0110010, 0b00011, "hlvx.hu">, Sched<[]>;
 def HLV_W   : HLoad_r<0b0110100, 0b00000, "hlv.w">, Sched<[]>;
 def HLVX_WU : HLoad_r<0b0110100, 0b00011, "hlvx.wu">, Sched<[]>;

llvm/lib/Target/RISCV/RISCVSubtarget.h

private:
   bool HasStdExtZkr = false;
   bool HasStdExtZkn = false;
   bool HasStdExtZks = false;
   bool HasStdExtZkt = false;
   bool HasStdExtZk = false;
   bool HasStdExtZicbom = false;
   bool HasStdExtZicboz = false;
   bool HasStdExtZicbop = false;
+  bool HasStdExtSvinval = false;
   bool HasStdExtZmmul = false;
   bool HasStdExtZawrs = false;
   bool HasStdExtZtso = false;
   bool HasRV32 = false;
   bool HasRV64 = false;
   bool IsRV32E = false;
   bool EnableLinkerRelax = false;
   bool EnableRVCHintInstrs = true;
public:
   bool hasStdExtZkne() const { return HasStdExtZkne; }
   bool hasStdExtZknh() const { return HasStdExtZknh; }
   bool hasStdExtZksed() const { return HasStdExtZksed; }
   bool hasStdExtZksh() const { return HasStdExtZksh; }
   bool hasStdExtZkr() const { return HasStdExtZkr; }
   bool hasStdExtZicbom() const { return HasStdExtZicbom; }
   bool hasStdExtZicboz() const { return HasStdExtZicboz; }
   bool hasStdExtZicbop() const { return HasStdExtZicbop; }
+  bool hasStdExtSvinval() const { return HasStdExtSvinval; }
   bool hasStdExtZawrs() const { return HasStdExtZawrs; }
   bool hasStdExtZmmul() const { return HasStdExtZmmul; }
   bool hasStdExtZtso() const { return HasStdExtZtso; }
   bool is64Bit() const { return HasRV64; }
   bool isRV32E() const { return IsRV32E; }
   bool enableLinkerRelax() const { return EnableLinkerRelax; }
   bool enableRVCHintInstrs() const { return EnableRVCHintInstrs; }
   bool enableDefaultUnroll() const { return EnableDefaultUnroll; }

llvm/test/CodeGen/RISCV/attributes.ll

 ; RUN: llc -mtriple=riscv32 -mattr=+zkt %s -o - | FileCheck --check-prefix=RV32ZKT %s
 ; RUN: llc -mtriple=riscv32 -mattr=+zk %s -o - | FileCheck --check-prefix=RV32ZK %s
 ; RUN: llc -mtriple=riscv32 -mattr=+zkn,+zkr,+zkt %s -o - | FileCheck --check-prefix=RV32COMBINEINTOZK %s
 ; RUN: llc -mtriple=riscv32 -mattr=+zbkb,+zbkc,+zbkx,+zkne,+zknd,+zknh %s -o - | FileCheck --check-prefix=RV32COMBINEINTOZKN %s
 ; RUN: llc -mtriple=riscv32 -mattr=+zbkb,+zbkc,+zbkx,+zksed,+zksh %s -o - | FileCheck --check-prefix=RV32COMBINEINTOZKS %s
 ; RUN: llc -mtriple=riscv32 -mattr=+zicbom %s -o - | FileCheck --check-prefix=RV32ZICBOM %s
 ; RUN: llc -mtriple=riscv32 -mattr=+zicboz %s -o - | FileCheck --check-prefix=RV32ZICBOZ %s
 ; RUN: llc -mtriple=riscv32 -mattr=+zicbop %s -o - | FileCheck --check-prefix=RV32ZICBOP %s
+; RUN: llc -mtriple=riscv32 -mattr=+svinval %s -o - | FileCheck --check-prefix=RV32SVINVAL %s
 ; RUN: llc -mtriple=riscv64 -mattr=+m %s -o - | FileCheck --check-prefix=RV64M %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zmmul %s -o - | FileCheck --check-prefix=RV64ZMMUL %s
 ; RUN: llc -mtriple=riscv64 -mattr=+m,+zmmul %s -o - | FileCheck --check-prefix=RV64MZMMUL %s
 ; RUN: llc -mtriple=riscv64 -mattr=+a %s -o - | FileCheck --check-prefix=RV64A %s
 ; RUN: llc -mtriple=riscv64 -mattr=+f %s -o - | FileCheck --check-prefix=RV64F %s
 ; RUN: llc -mtriple=riscv64 -mattr=+d %s -o - | FileCheck --check-prefix=RV64D %s
 ; RUN: llc -mtriple=riscv64 -mattr=+c %s -o - | FileCheck --check-prefix=RV64C %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zihintpause %s -o - | FileCheck --check-prefix=RV64ZIHINTPAUSE %s

 ; RUN: llc -mtriple=riscv64 -mattr=+zkt %s -o - | FileCheck --check-prefix=RV64ZKT %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zk %s -o - | FileCheck --check-prefix=RV64ZK %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zkn,+zkr,+zkt %s -o - | FileCheck --check-prefix=RV64COMBINEINTOZK %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zbkb,+zbkc,+zbkx,+zkne,+zknd,+zknh %s -o - | FileCheck --check-prefix=RV64COMBINEINTOZKN %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zbkb,+zbkc,+zbkx,+zksed,+zksh %s -o - | FileCheck --check-prefix=RV64COMBINEINTOZKS %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zicbom %s -o - | FileCheck --check-prefix=RV64ZICBOM %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zicboz %s -o - | FileCheck --check-prefix=RV64ZICBOZ %s
 ; RUN: llc -mtriple=riscv64 -mattr=+zicbop %s -o - | FileCheck --check-prefix=RV64ZICBOP %s
+; RUN: llc -mtriple=riscv64 -mattr=+svinval %s -o - | FileCheck --check-prefix=RV64SVINVAL %s
 ; RUN: llc -mtriple=riscv64 -mattr=+experimental-zawrs %s -o - | FileCheck --check-prefix=RV64ZAWRS %s
 ; RUN: llc -mtriple=riscv64 -mattr=+experimental-ztso %s -o - | FileCheck --check-prefix=RV64ZTSO %s
 
 ; RV32M: .attribute 5, "rv32i2p0_m2p0"
 ; RV32ZMMUL: .attribute 5, "rv32i2p0_zmmul1p0"
 ; RV32MZMMUL: .attribute 5, "rv32i2p0_m2p0_zmmul1p0"
 ; RV32A: .attribute 5, "rv32i2p0_a2p0"
 ; RV32F: .attribute 5, "rv32i2p0_f2p0"

 ; RV32ZKT: .attribute 5, "rv32i2p0_zkt1p0"
 ; RV32ZK: .attribute 5, "rv32i2p0_zbkb1p0_zbkc1p0_zbkx1p0_zk1p0_zkn1p0_zknd1p0_zkne1p0_zknh1p0_zkr1p0_zkt1p0"
 ; RV32COMBINEINTOZK: .attribute 5, "rv32i2p0_zbkb1p0_zbkc1p0_zbkx1p0_zk1p0_zkn1p0_zknd1p0_zkne1p0_zknh1p0_zkr1p0_zkt1p0"
 ; RV32COMBINEINTOZKN: .attribute 5, "rv32i2p0_zbkb1p0_zbkc1p0_zbkx1p0_zkn1p0_zknd1p0_zkne1p0_zknh1p0"
 ; RV32COMBINEINTOZKS: .attribute 5, "rv32i2p0_zbkb1p0_zbkc1p0_zbkx1p0_zks1p0_zksed1p0_zksh1p0"
 ; RV32ZICBOM: .attribute 5, "rv32i2p0_zicbom1p0"
 ; RV32ZICBOZ: .attribute 5, "rv32i2p0_zicboz1p0"
 ; RV32ZICBOP: .attribute 5, "rv32i2p0_zicbop1p0"
+; RV32SVINVAL: .attribute 5, "rv32i2p0_svinval1p0"
 
 ; RV64M: .attribute 5, "rv64i2p0_m2p0"
 ; RV64ZMMUL: .attribute 5, "rv64i2p0_zmmul1p0"
 ; RV64MZMMUL: .attribute 5, "rv64i2p0_m2p0_zmmul1p0"
 ; RV64A: .attribute 5, "rv64i2p0_a2p0"
 ; RV64F: .attribute 5, "rv64i2p0_f2p0"
 ; RV64D: .attribute 5, "rv64i2p0_f2p0_d2p0"
 ; RV64C: .attribute 5, "rv64i2p0_c2p0"

 ; RV64ZK: .attribute 5, "rv64i2p0_zbkb1p0_zbkc1p0_zbkx1p0_zk1p0_zkn1p0_zknd1p0_zkne1p0_zknh1p0_zkr1p0_zkt1p0"
 ; RV64COMBINEINTOZK: .attribute 5, "rv64i2p0_zbkb1p0_zbkc1p0_zbkx1p0_zk1p0_zkn1p0_zknd1p0_zkne1p0_zknh1p0_zkr1p0_zkt1p0"
 ; RV64COMBINEINTOZKN: .attribute 5, "rv64i2p0_zbkb1p0_zbkc1p0_zbkx1p0_zkn1p0_zknd1p0_zkne1p0_zknh1p0"
 ; RV64COMBINEINTOZKS: .attribute 5, "rv64i2p0_zbkb1p0_zbkc1p0_zbkx1p0_zks1p0_zksed1p0_zksh1p0"
 ; RV64ZICBOM: .attribute 5, "rv64i2p0_zicbom1p0"
 ; RV64ZICBOZ: .attribute 5, "rv64i2p0_zicboz1p0"
 ; RV64ZAWRS: .attribute 5, "rv64i2p0_zawrs1p0"
 ; RV64ZICBOP: .attribute 5, "rv64i2p0_zicbop1p0"
+; RV64SVINVAL: .attribute 5, "rv64i2p0_svinval1p0"
 ; RV64ZTSO: .attribute 5, "rv64i2p0_ztso0p1"
 
 define i32 @addi(i32 %a) {
   %1 = add i32 %a, 1
   ret i32 %1
 }

llvm/test/MC/RISCV/priv-valid.s

-# RUN: llvm-mc %s -triple=riscv32 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv32 -mattr=+svinval -riscv-no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK,CHECK-INST %s
-# RUN: llvm-mc %s -triple=riscv64 -riscv-no-aliases -show-encoding \
+# RUN: llvm-mc %s -triple=riscv64 -mattr=+svinval -riscv-no-aliases -show-encoding \
 # RUN:     | FileCheck -check-prefixes=CHECK,CHECK-INST %s
-# RUN: llvm-mc -filetype=obj -triple riscv32 < %s \
-# RUN:     | llvm-objdump -M no-aliases -d - \
+# RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+svinval < %s \
+# RUN:     | llvm-objdump --mattr=+svinval -M no-aliases -d - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
-# RUN: llvm-mc -filetype=obj -triple riscv64 < %s \
-# RUN:     | llvm-objdump -M no-aliases -d - \
+# RUN: llvm-mc -filetype=obj -triple riscv64 -mattr=+svinval < %s \
+# RUN:     | llvm-objdump --mattr=+svinval -M no-aliases -d - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 
 # CHECK-INST: uret
 # CHECK: encoding: [0x73,0x00,0x20,0x00]
 uret
 
 # CHECK-INST: sret
 # CHECK: encoding: [0x73,0x00,0x20,0x10]