3 files changed, 22 insertions, 263 deletions

diff --git a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index eb68c52745e..ca2032b11c6 100644
--- a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -82,10 +82,6 @@ class MipsAsmParser : public MCTargetAsmParser {
   MCSubtargetInfo &STI;
   MCAsmParser &Parser;
   MipsAssemblerOptions Options;
-  MCSymbol *CurrentFn; // Pointer to the function being parsed. It may be a
-                       // nullptr, which indicates that no function is currently
-                       // selected. This usually happens after an '.end func'
-                       // directive.
 
 #define GET_ASSEMBLER_HEADER
 #include "MipsGenAsmMatcher.inc"
@@ -289,8 +285,6 @@ public:
 
     if (!isABI_O32() && !useOddSPReg() != 0)
       report_fatal_error("-mno-odd-spreg requires the O32 ABI");
-
-    CurrentFn = nullptr;
   }
 
   MCAsmParser &getParser() const { return Parser; }
@@ -3061,151 +3055,22 @@ bool MipsAsmParser::ParseDirective(AsmToken DirectiveID) {
     parseDataDirective(8, DirectiveID.getLoc());
     return false;
   }
-  if (IDVal == ".ent") {
-    StringRef SymbolName;
 
-    if (Parser.parseIdentifier(SymbolName)) {
-      reportParseError("expected identifier after .ent");
-      return false;
-    }
-
-    // There's an undocumented extension that allows an integer to
-    // follow the name of the procedure which AFAICS is ignored by GAS.
-    // Example: .ent foo,2
-    if (getLexer().isNot(AsmToken::EndOfStatement)) {
-      if (getLexer().isNot(AsmToken::Comma)) {
-        // Even though we accept this undocumented extension for compatibility
-        // reasons, the additional integer argument does not actually change
-        // the behaviour of the '.ent' directive, so we would like to discourage
-        // its use. We do this by not referring to the extended version in
-        // error messages which are not directly related to its use.
-        reportParseError("unexpected token, expected end of statement");
-        return false;
-      }
-      Parser.Lex(); // Eat the comma.
-      const MCExpr *DummyNumber;
-      int64_t DummyNumberVal;
-      // If the user was explicitly trying to use the extended version,
-      // we still give helpful extension-related error messages.
-      if (Parser.parseExpression(DummyNumber)) {
-        reportParseError("expected number after comma");
-        return false;
-      }
-      if (!DummyNumber->EvaluateAsAbsolute(DummyNumberVal)) {
-        reportParseError("expected an absolute expression after comma");
-        return false;
-      }
-    }
-
-    // If this is not the end of the statement, report an error.
-    if (getLexer().isNot(AsmToken::EndOfStatement)) {
-      reportParseError("unexpected token, expected end of statement");
-      return false;
-    }
-
-    MCSymbol *Sym = getContext().GetOrCreateSymbol(SymbolName);
-
-    getTargetStreamer().emitDirectiveEnt(*Sym);
-    CurrentFn = Sym;
+  if (IDVal == ".ent") {
+    // Ignore this directive for now.
+    Parser.Lex();
     return false;
   }
 
   if (IDVal == ".end") {
-    StringRef SymbolName;
-
-    if (Parser.parseIdentifier(SymbolName)) {
-      reportParseError("expected identifier after .end");
-      return false;
-    }
-
-    if (getLexer().isNot(AsmToken::EndOfStatement)) {
-      reportParseError("unexpected token, expected end of statement");
-      return false;
-    }
-
-    if (CurrentFn == nullptr) {
-      reportParseError(".end used without .ent");
-      return false;
-    }
-
-    if ((SymbolName != CurrentFn->getName())) {
-      reportParseError(".end symbol does not match .ent symbol");
-      return false;
-    }
-
-    getTargetStreamer().emitDirectiveEnd(SymbolName);
-    CurrentFn = nullptr;
+    // Ignore this directive for now.
+    Parser.Lex();
     return false;
   }
 
   if (IDVal == ".frame") {
-    // .frame $stack_reg, frame_size_in_bytes, $return_reg
-    SmallVector<std::unique_ptr<MCParsedAsmOperand>, 1> TmpReg;
-    OperandMatchResultTy ResTy = ParseAnyRegister(TmpReg);
-    if (ResTy == MatchOperand_NoMatch || ResTy == MatchOperand_ParseFail) {
-      reportParseError("expected stack register");
-      return false;
-    }
-
-    MipsOperand &StackRegOpnd = static_cast<MipsOperand &>(*TmpReg[0]);
-    if (!StackRegOpnd.isGPRAsmReg()) {
-      reportParseError(StackRegOpnd.getStartLoc(),
-                       "expected general purpose register");
-      return false;
-    }
-    unsigned StackReg = StackRegOpnd.getGPR32Reg();
-
-    if (Parser.getTok().is(AsmToken::Comma))
-      Parser.Lex();
-    else {
-      reportParseError("unexpected token, expected comma");
-      return false;
-    }
-
-    // Parse the frame size.
-    const MCExpr *FrameSize;
-    int64_t FrameSizeVal;
-
-    if (Parser.parseExpression(FrameSize)) {
-      reportParseError("expected frame size value");
-      return false;
-    }
-
-    if (!FrameSize->EvaluateAsAbsolute(FrameSizeVal)) {
-      reportParseError("frame size not an absolute expression");
-      return false;
-    }
-
-    if (Parser.getTok().is(AsmToken::Comma))
-      Parser.Lex();
-    else {
-      reportParseError("unexpected token, expected comma");
-      return false;
-    }
-
-    // Parse the return register.
-    TmpReg.clear();
-    ResTy = ParseAnyRegister(TmpReg);
-    if (ResTy == MatchOperand_NoMatch || ResTy == MatchOperand_ParseFail) {
-      reportParseError("expected return register");
-      return false;
-    }
-
-    MipsOperand &ReturnRegOpnd = static_cast<MipsOperand &>(*TmpReg[0]);
-    if (!ReturnRegOpnd.isGPRAsmReg()) {
-      reportParseError(ReturnRegOpnd.getStartLoc(),
-                       "expected general purpose register");
-      return false;
-    }
-
-    // If this is not the end of the statement, report an error.
-    if (getLexer().isNot(AsmToken::EndOfStatement)) {
-      reportParseError("unexpected token, expected end of statement");
-      return false;
-    }
-
-    getTargetStreamer().emitFrame(StackReg, FrameSizeVal,
-                                  ReturnRegOpnd.getGPR32Reg());
+    // Ignore this directive for now.
+    Parser.eatToEndOfStatement();
     return false;
   }
 
@@ -3213,61 +3078,15 @@ bool MipsAsmParser::ParseDirective(AsmToken DirectiveID) {
     return parseDirectiveSet();
   }
 
-  if (IDVal == ".mask" || IDVal == ".fmask") {
-    // .mask bitmask, frame_offset
-    // bitmask: One bit for each register used.
-    // frame_offset: Offset from Canonical Frame Address ($sp on entry) where
-    //               first register is expected to be saved.
-    // Examples:
-    //   .mask 0x80000000, -4
-    //   .fmask 0x80000000, -4
-    //
-
-    // Parse the bitmask
-    const MCExpr *BitMask;
-    int64_t BitMaskVal;
-
-    if (Parser.parseExpression(BitMask)) {
-      reportParseError("expected bitmask value");
-      return false;
-    }
-
-    if (!BitMask->EvaluateAsAbsolute(BitMaskVal)) {
-      reportParseError("bitmask not an absolute expression");
-      return false;
-    }
-
-    if (Parser.getTok().is(AsmToken::Comma))
-      Parser.Lex();
-    else {
-      reportParseError("unexpected token, expected comma");
-      return false;
-    }
-
-    // Parse the frame_offset
-    const MCExpr *FrameOffset;
-    int64_t FrameOffsetVal;
-
-    if (Parser.parseExpression(FrameOffset)) {
-      reportParseError("expected frame offset value");
-      return false;
-    }
-
-    if (!FrameOffset->EvaluateAsAbsolute(FrameOffsetVal)) {
-      reportParseError("frame offset not an absolute expression");
-      return false;
-    }
-
-    // If this is not the end of the statement, report an error.
-    if (getLexer().isNot(AsmToken::EndOfStatement)) {
-      reportParseError("unexpected token, expected end of statement");
-      return false;
-    }
+  if (IDVal == ".fmask") {
+    // Ignore this directive for now.
+    Parser.eatToEndOfStatement();
+    return false;
+  }
 
-    if (IDVal == ".mask")
-      getTargetStreamer().emitMask(BitMaskVal, FrameOffsetVal);
-    else
-      getTargetStreamer().emitFMask(BitMaskVal, FrameOffsetVal);
+  if (IDVal == ".mask") {
+    // Ignore this directive for now.
+    Parser.eatToEndOfStatement();
     return false;
   }
 
diff --git a/llvm/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp b/llvm/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp
index 23e0d90dc0b..7a8230fdebf 100644
--- a/llvm/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp
+++ b/llvm/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp
@@ -29,9 +29,7 @@
 using namespace llvm;
 
 MipsTargetStreamer::MipsTargetStreamer(MCStreamer &S)
-    : MCTargetStreamer(S), canHaveModuleDirective(true) {
-  GPRInfoSet = FPRInfoSet = FrameInfoSet = false;
-}
+    : MCTargetStreamer(S), canHaveModuleDirective(true) {}
 void MipsTargetStreamer::emitDirectiveSetMicroMips() {}
 void MipsTargetStreamer::emitDirectiveSetNoMicroMips() {}
 void MipsTargetStreamer::emitDirectiveSetMips16() {}
@@ -494,45 +492,11 @@ void MipsTargetELFStreamer::emitDirectiveSetNoAt() {
 }
 
 void MipsTargetELFStreamer::emitDirectiveEnd(StringRef Name) {
-  MCAssembler &MCA = getStreamer().getAssembler();
-  MCContext &Context = MCA.getContext();
-  MCStreamer &OS = getStreamer();
-
-  const MCSectionELF *Sec = Context.getELFSection(".pdr", ELF::SHT_PROGBITS,
-                                                  ELF::SHF_ALLOC | ELF::SHT_REL,
-                                                  SectionKind::getMetadata());
-
-  const MCSymbolRefExpr *ExprRef =
-      MCSymbolRefExpr::Create(Name, MCSymbolRefExpr::VK_None, Context);
-
-  MCSectionData &SecData = MCA.getOrCreateSectionData(*Sec);
-  SecData.setAlignment(4);
-
-  OS.PushSection();
-
-  OS.SwitchSection(Sec);
-
-  OS.EmitValueImpl(ExprRef, 4);
-
-  OS.EmitIntValue(GPRInfoSet ? GPRBitMask : 0, 4); // reg_mask
-  OS.EmitIntValue(GPRInfoSet ? GPROffset : 0, 4);  // reg_offset
-
-  OS.EmitIntValue(FPRInfoSet ? FPRBitMask : 0, 4); // fpreg_mask
-  OS.EmitIntValue(FPRInfoSet ? FPROffset : 0, 4);  // fpreg_offset
-
-  OS.EmitIntValue(FrameInfoSet ? FrameOffset : 0, 4); // frame_offset
-  OS.EmitIntValue(FrameInfoSet ? FrameReg : 0, 4);    // frame_reg
-  OS.EmitIntValue(FrameInfoSet ? ReturnReg : 0, 4);   // return_reg
-
-  // The .end directive marks the end of a procedure. Invalidate
-  // the information gathered up until this point.
-  GPRInfoSet = FPRInfoSet = FrameInfoSet = false;
-
-  OS.PopSection();
+  // FIXME: implement.
 }
 
 void MipsTargetELFStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
-  GPRInfoSet = FPRInfoSet = FrameInfoSet = false;
+  // FIXME: implement.
 }
 
 void MipsTargetELFStreamer::emitDirectiveAbiCalls() {
@@ -578,28 +542,18 @@ void MipsTargetELFStreamer::emitDirectiveOptionPic2() {
 }
 
 void MipsTargetELFStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
-                                      unsigned ReturnReg_) {
-  MCContext &Context = getStreamer().getAssembler().getContext();
-  const MCRegisterInfo *RegInfo = Context.getRegisterInfo();
-
-  FrameInfoSet = true;
-  FrameReg = RegInfo->getEncodingValue(StackReg);
-  FrameOffset = StackSize;
-  ReturnReg = RegInfo->getEncodingValue(ReturnReg_);
+                                      unsigned ReturnReg) {
+  // FIXME: implement.
 }
 
 void MipsTargetELFStreamer::emitMask(unsigned CPUBitmask,
                                      int CPUTopSavedRegOff) {
-  GPRInfoSet = true;
-  GPRBitMask = CPUBitmask;
-  GPROffset = CPUTopSavedRegOff;
+  // FIXME: implement.
 }
 
 void MipsTargetELFStreamer::emitFMask(unsigned FPUBitmask,
                                       int FPUTopSavedRegOff) {
-  FPRInfoSet = true;
-  FPRBitMask = FPUBitmask;
-  FPROffset = FPUTopSavedRegOff;
+  // FIXME: implement.
 }
 
 void MipsTargetELFStreamer::emitDirectiveSetMips1() {
diff --git a/llvm/lib/Target/Mips/MipsTargetStreamer.h b/llvm/lib/Target/Mips/MipsTargetStreamer.h
index fbea033eee9..8253c622563 100644
--- a/llvm/lib/Target/Mips/MipsTargetStreamer.h
+++ b/llvm/lib/Target/Mips/MipsTargetStreamer.h
@@ -11,7 +11,6 @@
 #define MIPSTARGETSTREAMER_H
 
 #include "llvm/MC/MCELFStreamer.h"
-#include "llvm/MC/MCRegisterInfo.h"
 #include "llvm/MC/MCStreamer.h"
 #include "MCTargetDesc/MipsABIFlagsSection.h"
 
@@ -98,19 +97,6 @@ public:
 protected:
   MipsABIFlagsSection ABIFlagsSection;
 
-  bool GPRInfoSet;
-  unsigned GPRBitMask;
-  int GPROffset;
-
-  bool FPRInfoSet;
-  unsigned FPRBitMask;
-  int FPROffset;
-
-  bool FrameInfoSet;
-  int FrameOffset;
-  unsigned FrameReg;
-  unsigned ReturnReg;
-
 private:
   bool canHaveModuleDirective;
 };