commit 2b953d0b39e232e43c17022b50d4c848e0d9adce
author Vladimir Medic <Vladimir.Medic@imgtec.com> Tue Oct 01 09:48:56 2013 +0000
committer Vladimir Medic <Vladimir.Medic@imgtec.com> Tue Oct 01 09:48:56 2013 +0000
tree a77e7e92188bebc13684cd6eabdde5f9c818652e
parent 3b75f5d282f2c7189c79645284293e67e6b519af

This patch adds aliases for Mips sub instruction with immediate operands. Corresponding test cases are added.

llvm-svn: 191734

llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp

diff --git a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index 5b77d87..447e7dc 100644
--- a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -144,6 +144,9 @@
   MipsAsmParser::OperandMatchResultTy
   parseMSA128DRegs(SmallVectorImpl<MCParsedAsmOperand*> &Operands);
 
+  MipsAsmParser::OperandMatchResultTy
+  parseInvNum(SmallVectorImpl<MCParsedAsmOperand*> &Operands);
+
   bool searchSymbolAlias(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
                          unsigned RegKind);
 
@@ -351,6 +354,7 @@
   bool isToken() const { return Kind == k_Token; }
   bool isMem() const { return Kind == k_Memory; }
   bool isPtrReg() const { return Kind == k_PtrReg; }
+  bool isInvNum() const { return Kind == k_Immediate; }
 
   StringRef getToken() const {
     assert(Kind == k_Token && "Invalid access!");
@@ -1817,6 +1821,24 @@
   return parseRegs(Operands, (int) MipsOperand::Kind_CCRRegs);
 }
 
+MipsAsmParser::OperandMatchResultTy
+MipsAsmParser::parseInvNum(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
+  const MCExpr *IdVal;
+  // If the first token is '$' we may have register operand.
+  if (Parser.getTok().is(AsmToken::Dollar))
+    return MatchOperand_NoMatch;
+  SMLoc S = Parser.getTok().getLoc();
+  if (getParser().parseExpression(IdVal))
+    return MatchOperand_ParseFail;
+  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(IdVal);
+    assert( MCE && "Unexpected MCExpr type.");
+  int64_t Val = MCE->getValue();
+  SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
+  Operands.push_back(MipsOperand::CreateImm(
+                     MCConstantExpr::Create(0 - Val, getContext()), S, E));
+  return MatchOperand_Success;
+}
+
 MCSymbolRefExpr::VariantKind MipsAsmParser::getVariantKind(StringRef Symbol) {
 
   MCSymbolRefExpr::VariantKind VK