diff --git a/lld/ELF/Thunks.cpp b/lld/ELF/Thunks.cpp
--- a/lld/ELF/Thunks.cpp
+++ b/lld/ELF/Thunks.cpp
@@ -1313,20 +1313,18 @@
   Symbol &s = *rel.sym;
   int64_t a = rel.addend;
 
-  if (config->emachine == EM_AARCH64)
+  switch (config->emachine) {
+  case EM_AARCH64:
     return addThunkAArch64(rel.type, s, a);
-
-  if (config->emachine == EM_ARM)
+  case EM_ARM:
     return addThunkArm(rel.type, s, a);
-
-  if (config->emachine == EM_MIPS)
+  case EM_MIPS:
     return addThunkMips(rel.type, s);
-
-  if (config->emachine == EM_PPC)
+  case EM_PPC:
     return addThunkPPC32(isec, rel, s);
-
-  if (config->emachine == EM_PPC64)
+  case EM_PPC64:
     return addThunkPPC64(rel.type, s, a);
-
-  llvm_unreachable("add Thunk only supported for ARM, Mips and PowerPC");
+  default:
+    llvm_unreachable("add Thunk only supported for ARM, Mips and PowerPC");
+  }
 }