[ELF] Rename R_TLS to R_TPREL and R_NEG_TLS to R_TPREL_NEG. NFC

The scope of R_TLS (TP offset relocation types (TPREL/TPOFF) used for the
local-exec TLS model) is actually narrower than its name may imply. R_TLS_NEG
is only used by Solaris R_386_TLS_LE_32.

Rename them so that they will be less confusing.

Reviewed By: grimar, psmith, rprichard

Differential Revision: https://reviews.llvm.org/D93467

lld/ELF/Arch/AArch64.cpp

@@ -120,7 +120,7 @@ RelExpr AArch64::getRelExpr(RelType type, const Symbol &s,
   case R_AARCH64_TLSLE_MOVW_TPREL_G1:
   case R_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
   case R_AARCH64_TLSLE_MOVW_TPREL_G2:
-    return R_TLS;
+    return R_TPREL;
   case R_AARCH64_CALL26:
   case R_AARCH64_CONDBR19:
   case R_AARCH64_JUMP26:

lld/ELF/Arch/ARM.cpp

@@ -150,7 +150,7 @@ RelExpr ARM::getRelExpr(RelType type, const Symbol &s,
   case R_ARM_NONE:
     return R_NONE;
   case R_ARM_TLS_LE32:
-    return R_TLS;
+    return R_TPREL;
   case R_ARM_V4BX:
     // V4BX is just a marker to indicate there's a "bx rN" instruction at the
     // given address. It can be used to implement a special linker mode which

lld/ELF/Arch/Hexagon.cpp

@@ -154,7 +154,7 @@ RelExpr Hexagon::getRelExpr(RelType type, const Symbol &s,
   case R_HEX_TPREL_32_6_X:
   case R_HEX_TPREL_HI16:
   case R_HEX_TPREL_LO16:
-    return R_TLS;
+    return R_TPREL;
   default:
     error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) +
           ") against symbol " + toString(s));

lld/ELF/Arch/Mips.cpp

@@ -146,7 +146,7 @@ RelExpr MIPS<ELFT>::getRelExpr(RelType type, const Symbol &s,
   case R_MIPS_TLS_TPREL64:
   case R_MICROMIPS_TLS_TPREL_HI16:
   case R_MICROMIPS_TLS_TPREL_LO16:
-    return R_TLS;
+    return R_TPREL;
   case R_MIPS_PC32:
   case R_MIPS_PC16:
   case R_MIPS_PC19_S2:

lld/ELF/Arch/PPC.cpp

@@ -259,7 +259,7 @@ RelExpr PPC::getRelExpr(RelType type, const Symbol &s,
   case R_PPC_TPREL16_HA:
   case R_PPC_TPREL16_LO:
   case R_PPC_TPREL16_HI:
-    return R_TLS;
+    return R_TPREL;
   default:
     error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) +
           ") against symbol " + toString(s));

lld/ELF/Arch/PPC64.cpp

@@ -1025,7 +1025,7 @@ RelExpr PPC64::getRelExpr(RelType type, const Symbol &s,
   case R_PPC64_TPREL16_HIGHEST:
   case R_PPC64_TPREL16_HIGHESTA:
   case R_PPC64_TPREL34:
-    return R_TLS;
+    return R_TPREL;
   case R_PPC64_DTPREL16:
   case R_PPC64_DTPREL16_DS:
   case R_PPC64_DTPREL16_HA:

lld/ELF/Arch/RISCV.cpp

@@ -235,7 +235,7 @@ RelExpr RISCV::getRelExpr(const RelType type, const Symbol &s,
   case R_RISCV_TPREL_HI20:
   case R_RISCV_TPREL_LO12_I:
   case R_RISCV_TPREL_LO12_S:
-    return R_TLS;
+    return R_TPREL;
   case R_RISCV_RELAX:
   case R_RISCV_TPREL_ADD:
     return R_NONE;

lld/ELF/Arch/SPARCV9.cpp

@@ -78,7 +78,7 @@ RelExpr SPARCV9::getRelExpr(RelType type, const Symbol &s,
     return R_NONE;
   case R_SPARC_TLS_LE_HIX22:
   case R_SPARC_TLS_LE_LOX10:
-    return R_TLS;
+    return R_TPREL;
   default:
     error(getErrorLocation(loc) + "unknown relocation (" + Twine(type) +
           ") against symbol " + toString(s));

lld/ELF/Arch/X86.cpp

@@ -148,9 +148,9 @@ RelExpr X86::getRelExpr(RelType type, const Symbol &s,
   case R_386_GOTOFF:
     return R_GOTPLTREL;
   case R_386_TLS_LE:
-    return R_TLS;
+    return R_TPREL;
   case R_386_TLS_LE_32:
-    return R_NEG_TLS;
+    return R_TPREL_NEG;
   case R_386_NONE:
     return R_NONE;
   default:

lld/ELF/Arch/X86_64.cpp

@@ -324,7 +324,7 @@ RelExpr X86_64::getRelExpr(RelType type, const Symbol &s,
   case R_X86_64_DTPOFF64:
     return R_DTPREL;
   case R_X86_64_TPOFF32:
-    return R_TLS;
+    return R_TPREL;
   case R_X86_64_TLSDESC_CALL:
     return R_TLSDESC_CALL;
   case R_X86_64_TLSLD:

lld/ELF/InputSection.cpp

@@ -812,7 +812,7 @@ uint64_t InputSectionBase::getRelocTargetVA(const InputFile *file, RelType type,
   case R_RELAX_TLS_GD_TO_LE:
   case R_RELAX_TLS_IE_TO_LE:
   case R_RELAX_TLS_LD_TO_LE:
-  case R_TLS:
+  case R_TPREL:
     // It is not very clear what to return if the symbol is undefined. With
     // --noinhibit-exec, even a non-weak undefined reference may reach here.
     // Just return A, which matches R_ABS, and the behavior of some dynamic
@@ -821,7 +821,7 @@ uint64_t InputSectionBase::getRelocTargetVA(const InputFile *file, RelType type,
       return a;
     return getTlsTpOffset(sym) + a;
   case R_RELAX_TLS_GD_TO_LE_NEG:
-  case R_NEG_TLS:
+  case R_TPREL_NEG:
     if (sym.isUndefined())
       return a;
     return -getTlsTpOffset(sym) + a;

lld/ELF/Relocations.cpp

@@ -1073,7 +1073,7 @@ static void addPltEntry(PltSection *plt, GotPltSection *gotPlt,
 static void addGotEntry(Symbol &sym) {
   in.got->addEntry(sym);
 
-  RelExpr expr = sym.isTls() ? R_TLS : R_ABS;
+  RelExpr expr = sym.isTls() ? R_TPREL : R_ABS;
   uint64_t off = sym.getGotOffset();
 
   // If a GOT slot value can be calculated at link-time, which is now,

lld/ELF/Relocations.h

@@ -41,7 +41,6 @@ enum RelExpr {
   R_GOTPLT,
   R_GOTPLTREL,
   R_GOTREL,
-  R_NEG_TLS,
   R_NONE,
   R_PC,
   R_PLT,
@@ -58,7 +57,8 @@ enum RelExpr {
   R_RELAX_TLS_LD_TO_LE,
   R_RELAX_TLS_LD_TO_LE_ABS,
   R_SIZE,
-  R_TLS,
+  R_TPREL,
+  R_TPREL_NEG,
   R_TLSDESC,
   R_TLSDESC_CALL,
   R_TLSDESC_PC,