diff --git a/llvm/include/llvm/Object/ELFObjectFile.h b/llvm/include/llvm/Object/ELFObjectFile.h
--- a/llvm/include/llvm/Object/ELFObjectFile.h
+++ b/llvm/include/llvm/Object/ELFObjectFile.h
@@ -56,6 +56,7 @@
   SubtargetFeatures getMIPSFeatures() const;
   SubtargetFeatures getARMFeatures() const;
   SubtargetFeatures getRISCVFeatures() const;
+  SubtargetFeatures getLoongArchFeatures() const;
 
   StringRef getAMDGPUCPUName() const;
 
diff --git a/llvm/lib/Object/ELF.cpp b/llvm/lib/Object/ELF.cpp
--- a/llvm/lib/Object/ELF.cpp
+++ b/llvm/lib/Object/ELF.cpp
@@ -223,6 +223,8 @@
     break;
   case ELF::EM_BPF:
     break;
+  case ELF::EM_LOONGARCH:
+    return ELF::R_LARCH_RELATIVE;
   default:
     break;
   }
diff --git a/llvm/lib/Object/ELFObjectFile.cpp b/llvm/lib/Object/ELFObjectFile.cpp
--- a/llvm/lib/Object/ELFObjectFile.cpp
+++ b/llvm/lib/Object/ELFObjectFile.cpp
@@ -342,6 +342,26 @@
   return Features;
 }
 
+SubtargetFeatures ELFObjectFileBase::getLoongArchFeatures() const {
+  SubtargetFeatures Features;
+
+  switch (getPlatformFlags() & ELF::EF_LOONGARCH_ABI_MODIFIER_MASK) {
+  case ELF::EF_LOONGARCH_ABI_SOFT_FLOAT:
+    break;
+  case ELF::EF_LOONGARCH_ABI_DOUBLE_FLOAT:
+    Features.AddFeature("d");
+    // D implies F according to LoongArch ISA spec.
+    // It's only two features so don't bother with [[fallthrough]] at present.
+    Features.AddFeature("f");
+    break;
+  case ELF::EF_LOONGARCH_ABI_SINGLE_FLOAT:
+    Features.AddFeature("f");
+    break;
+  }
+
+  return Features;
+}
+
 SubtargetFeatures ELFObjectFileBase::getFeatures() const {
   switch (getEMachine()) {
   case ELF::EM_MIPS:
@@ -350,6 +370,8 @@
     return getARMFeatures();
   case ELF::EM_RISCV:
     return getRISCVFeatures();
+  case ELF::EM_LOONGARCH:
+    return getLoongArchFeatures();
   default:
     return SubtargetFeatures();
   }
diff --git a/llvm/unittests/Object/ELFTest.cpp b/llvm/unittests/Object/ELFTest.cpp
--- a/llvm/unittests/Object/ELFTest.cpp
+++ b/llvm/unittests/Object/ELFTest.cpp
@@ -237,6 +237,7 @@
 
 TEST(ELFTest, getELFRelativeRelocationType) {
   EXPECT_EQ(ELF::R_VE_RELATIVE, getELFRelativeRelocationType(EM_VE));
+  EXPECT_EQ(ELF::R_LARCH_RELATIVE, getELFRelativeRelocationType(EM_LOONGARCH));
 }
 
 // This is a test for the DataRegion helper struct, defined in ELF.h header.