[llvm] [RISCV] Move matchRegisterNameHelper into the RISCVAsmParser and remove IsRVE argument. NFC (PR #85172)

[Craig Topper via llvm-commits]

https://github.com/topperc created https://github.com/llvm/llvm-project/pull/85172

With it in the class we can use isRVE() inside the function instead of making the callers do it.

>From afda72e35c11ca3f1605b4a886eae283ad66c78d Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Wed, 13 Mar 2024 20:49:13 -0700
Subject: [PATCH] [RISCV] Move matchRegisterNameHelper into the RISCVAsmParser
 and remove IsRVE argument. NFC

With it in the class we can use isRVE() inside the function instead
of making the callers do it.
---
 .../Target/RISCV/AsmParser/RISCVAsmParser.cpp | 25 ++++++++++---------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp b/llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
index 2da75bda8d1263..a78e89d9eb7a88 100644
--- a/llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
+++ b/llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
@@ -107,6 +107,7 @@ class RISCVAsmParser : public MCTargetAsmParser {
                                uint64_t &ErrorInfo,
                                bool MatchingInlineAsm) override;
 
+  MCRegister matchRegisterNameHelper(StringRef Name) const;
   bool parseRegister(MCRegister &Reg, SMLoc &StartLoc, SMLoc &EndLoc) override;
   ParseStatus tryParseRegister(MCRegister &Reg, SMLoc &StartLoc,
                                SMLoc &EndLoc) override;
@@ -1630,7 +1631,7 @@ bool RISCVAsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
 // alternative ABI names), setting RegNo to the matching register. Upon
 // failure, returns a non-valid MCRegister. If IsRVE, then registers x16-x31
 // will be rejected.
-static MCRegister matchRegisterNameHelper(bool IsRVE, StringRef Name) {
+MCRegister RISCVAsmParser::matchRegisterNameHelper(StringRef Name) const {
   MCRegister Reg = MatchRegisterName(Name);
   // The 16-/32- and 64-bit FPRs have the same asm name. Check that the initial
   // match always matches the 64-bit variant, and not the 16/32-bit one.
@@ -1641,7 +1642,7 @@ static MCRegister matchRegisterNameHelper(bool IsRVE, StringRef Name) {
   static_assert(RISCV::F0_D < RISCV::F0_F, "FPR matching must be updated");
   if (!Reg)
     Reg = MatchRegisterAltName(Name);
-  if (IsRVE && Reg >= RISCV::X16 && Reg <= RISCV::X31)
+  if (isRVE() && Reg >= RISCV::X16 && Reg <= RISCV::X31)
     Reg = RISCV::NoRegister;
   return Reg;
 }
@@ -1660,7 +1661,7 @@ ParseStatus RISCVAsmParser::tryParseRegister(MCRegister &Reg, SMLoc &StartLoc,
   EndLoc = Tok.getEndLoc();
   StringRef Name = getLexer().getTok().getIdentifier();
 
-  Reg = matchRegisterNameHelper(isRVE(), Name);
+  Reg = matchRegisterNameHelper(Name);
   if (!Reg)
     return ParseStatus::NoMatch;
 
@@ -1693,7 +1694,7 @@ ParseStatus RISCVAsmParser::parseRegister(OperandVector &Operands,
     return ParseStatus::NoMatch;
   case AsmToken::Identifier:
     StringRef Name = getLexer().getTok().getIdentifier();
-    MCRegister RegNo = matchRegisterNameHelper(isRVE(), Name);
+    MCRegister RegNo = matchRegisterNameHelper(Name);
 
     if (!RegNo) {
       if (HadParens)
@@ -2232,7 +2233,7 @@ ParseStatus RISCVAsmParser::parseMaskReg(OperandVector &Operands) {
   StringRef Name = getLexer().getTok().getIdentifier();
   if (!Name.consume_back(".t"))
     return Error(getLoc(), "expected '.t' suffix");
-  MCRegister RegNo = matchRegisterNameHelper(isRVE(), Name);
+  MCRegister RegNo = matchRegisterNameHelper(Name);
 
   if (!RegNo)
     return ParseStatus::NoMatch;
@@ -2250,7 +2251,7 @@ ParseStatus RISCVAsmParser::parseGPRAsFPR(OperandVector &Operands) {
     return ParseStatus::NoMatch;
 
   StringRef Name = getLexer().getTok().getIdentifier();
-  MCRegister RegNo = matchRegisterNameHelper(isRVE(), Name);
+  MCRegister RegNo = matchRegisterNameHelper(Name);
 
   if (!RegNo)
     return ParseStatus::NoMatch;
@@ -2281,7 +2282,7 @@ ParseStatus RISCVAsmParser::parseGPRPair(OperandVector &Operands,
     return ParseStatus::NoMatch;
 
   StringRef Name = getLexer().getTok().getIdentifier();
-  MCRegister RegNo = matchRegisterNameHelper(isRVE(), Name);
+  MCRegister RegNo = matchRegisterNameHelper(Name);
 
   if (!RegNo)
     return ParseStatus::NoMatch;
@@ -2461,7 +2462,7 @@ ParseStatus RISCVAsmParser::parseRegReg(OperandVector &Operands) {
     return ParseStatus::NoMatch;
 
   StringRef RegName = getLexer().getTok().getIdentifier();
-  MCRegister Reg = matchRegisterNameHelper(isRVE(), RegName);
+  MCRegister Reg = matchRegisterNameHelper(RegName);
   if (!Reg)
     return Error(getLoc(), "invalid register");
   getLexer().Lex();
@@ -2473,7 +2474,7 @@ ParseStatus RISCVAsmParser::parseRegReg(OperandVector &Operands) {
     return Error(getLoc(), "expected register");
 
   StringRef Reg2Name = getLexer().getTok().getIdentifier();
-  MCRegister Reg2 = matchRegisterNameHelper(isRVE(), Reg2Name);
+  MCRegister Reg2 = matchRegisterNameHelper(Reg2Name);
   if (!Reg2)
     return Error(getLoc(), "invalid register");
   getLexer().Lex();
@@ -2500,7 +2501,7 @@ ParseStatus RISCVAsmParser::parseReglist(OperandVector &Operands) {
     return Error(getLoc(), "register list must start from 'ra' or 'x1'");
 
   StringRef RegName = getLexer().getTok().getIdentifier();
-  MCRegister RegStart = matchRegisterNameHelper(IsEABI, RegName);
+  MCRegister RegStart = matchRegisterNameHelper(RegName);
   MCRegister RegEnd;
   if (RegStart != RISCV::X1)
     return Error(getLoc(), "register list must start from 'ra' or 'x1'");
@@ -2511,7 +2512,7 @@ ParseStatus RISCVAsmParser::parseReglist(OperandVector &Operands) {
     if (getLexer().isNot(AsmToken::Identifier))
       return Error(getLoc(), "invalid register");
     StringRef RegName = getLexer().getTok().getIdentifier();
-    RegStart = matchRegisterNameHelper(IsEABI, RegName);
+    RegStart = matchRegisterNameHelper(RegName);
     if (!RegStart)
       return Error(getLoc(), "invalid register");
     if (RegStart != RISCV::X8)
@@ -2524,7 +2525,7 @@ ParseStatus RISCVAsmParser::parseReglist(OperandVector &Operands) {
   if (parseOptionalToken(AsmToken::Minus)) {
     StringRef EndName = getLexer().getTok().getIdentifier();
     // FIXME: the register mapping and checks of EABI is wrong
-    RegEnd = matchRegisterNameHelper(IsEABI, EndName);
+    RegEnd = matchRegisterNameHelper(EndName);
     if (!RegEnd)
       return Error(getLoc(), "invalid register");
     if (IsEABI && RegEnd != RISCV::X9)