[mips] [IAS] Refactor the emitDirectiveModuleFP() functions. NFC.

Summary:
Simplify emitDirectiveModuleFP() by having it just print the current information
from MipsABIFlagsSection and doing an updateABIInfo() before such calls.

This prevents us from forgetting to update the STI.FeatureBits,
because updateABIInfo() uses those to update the MipsABIFlagsSection object,
and also makes sure we use the update mechanism from MipsABIFlagsSection.

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: llvm-commits, mpf

Differential Revision: http://reviews.llvm.org/D10642

llvm-svn: 240637

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

@@ -4654,8 +4654,15 @@ bool MipsAsmParser::parseDirectiveModuleFP() {
     return false;
   }
 
-  // Emit appropriate flags.
-  getTargetStreamer().emitDirectiveModuleFP(FpABI, isABI_O32());
+  // Synchronize the abiflags information with the FeatureBits information we
+  // changed above.
+  getTargetStreamer().updateABIInfo(*this);
+
+  // If printing assembly, use the recently updated abiflags information.
+  // If generating ELF, don't do anything (the .MIPS.abiflags section gets
+  // emitted at the end).
+  getTargetStreamer().emitDirectiveModuleFP();
+
   Parser.Lex(); // Consume the EndOfStatement.
   return false;
 }
@@ -4680,6 +4687,8 @@ bool MipsAsmParser::parseFpABIValue(MipsABIFlagsSection::FpABIKind &FpABI,
     }
 
     FpABI = MipsABIFlagsSection::FpABIKind::XX;
+    setFeatureBits(Mips::FeatureFPXX, "fpxx");
+    clearFeatureBits(Mips::FeatureFP64Bit, "fp64");
     return true;
   }
 
@@ -4699,8 +4708,13 @@ bool MipsAsmParser::parseFpABIValue(MipsABIFlagsSection::FpABIKind &FpABI,
       }
 
       FpABI = MipsABIFlagsSection::FpABIKind::S32;
-    } else
+      clearFeatureBits(Mips::FeatureFPXX, "fpxx");
+      clearFeatureBits(Mips::FeatureFP64Bit, "fp64");
+    } else {
       FpABI = MipsABIFlagsSection::FpABIKind::S64;
+      clearFeatureBits(Mips::FeatureFPXX, "fpxx");
+      setFeatureBits(Mips::FeatureFP64Bit, "fp64");
+    }
 
     return true;
   }

llvm/lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp

@@ -93,15 +93,7 @@ void MipsTargetStreamer::emitDirectiveCpsetup(unsigned RegNo, int RegOrOffset,
                                               const MCSymbol &Sym, bool IsReg) {
 }
 
-void
-MipsTargetStreamer::emitDirectiveModuleFP(MipsABIFlagsSection::FpABIKind Value,
-                                          bool Is32BitABI) {
-  ABIFlagsSection.setFpABI(Value, Is32BitABI);
-}
-
-void MipsTargetStreamer::emitDirectiveModuleFP() {
-  emitDirectiveModuleFP(ABIFlagsSection.getFpABI(), ABIFlagsSection.Is32BitABI);
-}
+void MipsTargetStreamer::emitDirectiveModuleFP() {}
 
 void MipsTargetStreamer::emitDirectiveModuleOddSPReg() {
   if (!ABIFlagsSection.OddSPReg && !ABIFlagsSection.Is32BitABI)
@@ -379,12 +371,9 @@ void MipsTargetAsmStreamer::emitDirectiveCpsetup(unsigned RegNo,
   forbidModuleDirective();
 }
 
-void MipsTargetAsmStreamer::emitDirectiveModuleFP(
-    MipsABIFlagsSection::FpABIKind Value, bool Is32BitABI) {
-  MipsTargetStreamer::emitDirectiveModuleFP(Value, Is32BitABI);
-
+void MipsTargetAsmStreamer::emitDirectiveModuleFP() {
   OS << "\t.module\tfp=";
-  OS << ABIFlagsSection.getFpABIString(Value) << "\n";
+  OS << ABIFlagsSection.getFpABIString(ABIFlagsSection.getFpABI()) << "\n";
 }
 
 void MipsTargetAsmStreamer::emitDirectiveSetFp(

llvm/lib/Target/Mips/MipsTargetStreamer.h

@@ -80,16 +80,11 @@ public:
   virtual void emitDirectiveCpsetup(unsigned RegNo, int RegOrOffset,
                                     const MCSymbol &Sym, bool IsReg);
 
-  /// Emit a '.module fp=value' directive using the given values.
-  /// Updates the .MIPS.abiflags section
-  virtual void emitDirectiveModuleFP(MipsABIFlagsSection::FpABIKind Value,
-                                     bool Is32BitABI);
-  /// Emit a '.module fp=value' directive using the current values of the
-  /// .MIPS.abiflags section.
-  void emitDirectiveModuleFP();
-
+  // FP abiflags directives
+  virtual void emitDirectiveModuleFP();
   virtual void emitDirectiveModuleOddSPReg();
   virtual void emitDirectiveSetFp(MipsABIFlagsSection::FpABIKind Value);
+
   void forbidModuleDirective() { ModuleDirectiveAllowed = false; }
   void reallowModuleDirective() { ModuleDirectiveAllowed = true; }
   bool isModuleDirectiveAllowed() { return ModuleDirectiveAllowed; }
@@ -192,9 +187,8 @@ public:
   void emitDirectiveCpsetup(unsigned RegNo, int RegOrOffset,
                             const MCSymbol &Sym, bool IsReg) override;
 
-  // ABI Flags
-  void emitDirectiveModuleFP(MipsABIFlagsSection::FpABIKind Value,
-                             bool Is32BitABI) override;
+  // FP abiflags directives
+  void emitDirectiveModuleFP() override;
   void emitDirectiveModuleOddSPReg() override;
   void emitDirectiveSetFp(MipsABIFlagsSection::FpABIKind Value) override;
 };