[MC][mips] Replace setRType## methods by single setRTypes function. NFC

MCELFObjectWriter::setRType## methods are always used altogether to
build complete MIPS N64 ABI "chain" of relocations. Using single
function for this task makes code less verbose.

Author: atanasyan

llvm/include/llvm/MC/MCELFObjectWriter.h

@@ -130,14 +130,10 @@ class MCELFObjectTargetWriter : public MCObjectTargetWriter {
   }
 
   // N64 relocation type setting
-  unsigned setRType(unsigned Value, unsigned Type) const {
-    return ((Type & R_TYPE_MASK) | ((Value & 0xff) << R_TYPE_SHIFT));
-  }
-  unsigned setRType2(unsigned Value, unsigned Type) const {
-    return (Type & R_TYPE2_MASK) | ((Value & 0xff) << R_TYPE2_SHIFT);
-  }
-  unsigned setRType3(unsigned Value, unsigned Type) const {
-    return (Type & R_TYPE3_MASK) | ((Value & 0xff) << R_TYPE3_SHIFT);
+  static unsigned setRTypes(unsigned Value1, unsigned Value2, unsigned Value3) {
+    return ((Value1 & 0xff) << R_TYPE_SHIFT) |
+           ((Value2 & 0xff) << R_TYPE2_SHIFT) |
+           ((Value3 & 0xff) << R_TYPE3_SHIFT);
   }
   unsigned setRSsym(unsigned Value, unsigned Type) const {
     return (Type & R_SSYM_MASK) | ((Value & 0xff) << R_SSYM_SHIFT);

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

@@ -289,14 +289,9 @@ unsigned MipsELFObjectWriter::getRelocType(MCContext &Ctx,
   case FK_TPRel_8:
     return ELF::R_MIPS_TLS_TPREL64;
   case FK_GPRel_4:
-    if (is64Bit()) {
-      unsigned Type = (unsigned)ELF::R_MIPS_NONE;
-      Type = setRType((unsigned)ELF::R_MIPS_GPREL32, Type);
-      Type = setRType2((unsigned)ELF::R_MIPS_64, Type);
-      Type = setRType3((unsigned)ELF::R_MIPS_NONE, Type);
-      return Type;
-    }
-    return ELF::R_MIPS_GPREL32;
+    return setRTypes(ELF::R_MIPS_GPREL32,
+                     is64Bit() ? ELF::R_MIPS_64 : ELF::R_MIPS_NONE,
+                     ELF::R_MIPS_NONE);
   case Mips::fixup_Mips_GPREL16:
     return ELF::R_MIPS_GPREL16;
   case Mips::fixup_Mips_26:
@@ -329,34 +324,16 @@ unsigned MipsELFObjectWriter::getRelocType(MCContext &Ctx,
     return ELF::R_MIPS_GOT_OFST;
   case Mips::fixup_Mips_GOT_DISP:
     return ELF::R_MIPS_GOT_DISP;
-  case Mips::fixup_Mips_GPOFF_HI: {
-    unsigned Type = (unsigned)ELF::R_MIPS_NONE;
-    Type = setRType((unsigned)ELF::R_MIPS_GPREL16, Type);
-    Type = setRType2((unsigned)ELF::R_MIPS_SUB, Type);
-    Type = setRType3((unsigned)ELF::R_MIPS_HI16, Type);
-    return Type;
-  }
-  case Mips::fixup_MICROMIPS_GPOFF_HI: {
-    unsigned Type = (unsigned)ELF::R_MIPS_NONE;
-    Type = setRType((unsigned)ELF::R_MICROMIPS_GPREL16, Type);
-    Type = setRType2((unsigned)ELF::R_MICROMIPS_SUB, Type);
-    Type = setRType3((unsigned)ELF::R_MICROMIPS_HI16, Type);
-    return Type;
-  }
-  case Mips::fixup_Mips_GPOFF_LO: {
-    unsigned Type = (unsigned)ELF::R_MIPS_NONE;
-    Type = setRType((unsigned)ELF::R_MIPS_GPREL16, Type);
-    Type = setRType2((unsigned)ELF::R_MIPS_SUB, Type);
-    Type = setRType3((unsigned)ELF::R_MIPS_LO16, Type);
-    return Type;
-  }
-  case Mips::fixup_MICROMIPS_GPOFF_LO: {
-    unsigned Type = (unsigned)ELF::R_MIPS_NONE;
-    Type = setRType((unsigned)ELF::R_MICROMIPS_GPREL16, Type);
-    Type = setRType2((unsigned)ELF::R_MICROMIPS_SUB, Type);
-    Type = setRType3((unsigned)ELF::R_MICROMIPS_LO16, Type);
-    return Type;
-  }
+  case Mips::fixup_Mips_GPOFF_HI:
+    return setRTypes(ELF::R_MIPS_GPREL16, ELF::R_MIPS_SUB, ELF::R_MIPS_HI16);
+  case Mips::fixup_MICROMIPS_GPOFF_HI:
+    return setRTypes(ELF::R_MICROMIPS_GPREL16, ELF::R_MICROMIPS_SUB,
+                     ELF::R_MICROMIPS_HI16);
+  case Mips::fixup_Mips_GPOFF_LO:
+    return setRTypes(ELF::R_MIPS_GPREL16, ELF::R_MIPS_SUB, ELF::R_MIPS_LO16);
+  case Mips::fixup_MICROMIPS_GPOFF_LO:
+    return setRTypes(ELF::R_MICROMIPS_GPREL16, ELF::R_MICROMIPS_SUB,
+                     ELF::R_MICROMIPS_LO16);
   case Mips::fixup_Mips_HIGHER:
     return ELF::R_MIPS_HIGHER;
   case Mips::fixup_Mips_HIGHEST: