diff --git a/clang/include/clang/Basic/Attr.td b/clang/include/clang/Basic/Attr.td
--- a/clang/include/clang/Basic/Attr.td
+++ b/clang/include/clang/Basic/Attr.td
@@ -1767,6 +1767,13 @@
   let Documentation = [RISCVInterruptDocs];
 }
 
+def RISCVBuiltinAlias : InheritableAttr, TargetSpecificAttr<TargetRISCV> {
+  let Spellings = [Clang<"__clang_riscv_builtin_alias">];
+  let Subjects = SubjectList<[Function], ErrorDiag>;
+  let Args = [IdentifierArgument<"BuiltinName">];
+  let Documentation = [RISCVBuiltinAliasDocs];
+}
+
 // This is not a TargetSpecificAttr so that is silently accepted and
 // ignored on other targets as encouraged by the OpenCL spec.
 //
diff --git a/clang/include/clang/Basic/AttrDocs.td b/clang/include/clang/Basic/AttrDocs.td
--- a/clang/include/clang/Basic/AttrDocs.td
+++ b/clang/include/clang/Basic/AttrDocs.td
@@ -2132,6 +2132,26 @@
   }];
 }
 
+def RISCVBuiltinAliasDocs : Documentation {
+  let Category = DocCatFunction;
+  let Content = [{
+This attribute is used in the implementation of the RVV intrinsics.
+It allows the intrinsic functions to be declared using the names defined
+in RVV, and still be recognized as clang builtins equivalent to the
+underlying name. For example, ``riscv_vector_overloaded.h`` declares the function
+``vget`` with
+``__attribute__((__clang_riscv_builtin_alias(__builtin_rvv_vget_i8mf8x2_i8mf8)))``.
+This ensures that both functions are recognized as that clang builtin,
+and in the latter case, the choice of which builtin to identify the
+function as can be deferred until after overload resolution.
+
+This attribute can only be used to set up the aliases for certain RISC-V
+intrinsic functions; it is intended for use only inside ``riscv_*.h``
+and is not a general mechanism for declaring arbitrary aliases for
+clang builtin functions.
+  }];
+}
+
 def AVRInterruptDocs : Documentation {
   let Category = DocCatFunction;
   let Heading = "interrupt (AVR)";
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -11249,4 +11249,7 @@
 // RISC-V builtin required extension warning
 def err_riscv_builtin_requires_extension : Error<
   "builtin requires '%0' extension support to be enabled">;
+def err_attribute_riscv_builtin_alias : Error<
+  "'__clang_riscv_builtin_alias' attribute can only be applied to a RISC-V "
+  "builtin">;
 } // end of sema component.
diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -3265,6 +3265,8 @@
 
   if (const auto *ABAA = getAttr<ArmBuiltinAliasAttr>()) {
     BuiltinID = ABAA->getBuiltinName()->getBuiltinID();
+  } else if (const auto *RBAA = getAttr<RISCVBuiltinAliasAttr>()) {
+    BuiltinID = RBAA->getBuiltinName()->getBuiltinID();
   } else if (const auto *A = getAttr<BuiltinAttr>()) {
     BuiltinID = A->getID();
   }
@@ -3275,7 +3277,7 @@
   // If the function is marked "overloadable", it has a different mangled name
   // and is not the C library function.
   if (!ConsiderWrapperFunctions && hasAttr<OverloadableAttr>() &&
-      !hasAttr<ArmBuiltinAliasAttr>())
+      (!hasAttr<ArmBuiltinAliasAttr>() && !hasAttr<RISCVBuiltinAliasAttr>()))
     return 0;
 
   ASTContext &Context = getASTContext();
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -5120,6 +5120,7 @@
 #define GET_SVE_BUILTINS
 #define BUILTIN(name, types, attr) case SVE::BI##name:
 #include "clang/Basic/arm_sve_builtins.inc"
+#undef BUILTIN
     return true;
   }
 }
@@ -5146,6 +5147,37 @@
   D->addAttr(::new (S.Context) ArmBuiltinAliasAttr(S.Context, AL, Ident));
 }
 
+static bool RISCVVAliasValid(unsigned BuiltinID, StringRef AliasName) {
+  switch (BuiltinID) {
+  default:
+    return false;
+#define BUILTIN(ID, TYPE, ATTRS) case RISCV::BI##ID:
+#include "clang/Basic/BuiltinsRISCV.def"
+#undef BUILTIN
+    return true;
+  }
+}
+
+static void handleRISCVBuiltinAliasAttr(Sema &S, Decl *D,
+                                        const ParsedAttr &AL) {
+  if (!AL.isArgIdent(0)) {
+    S.Diag(AL.getLoc(), diag::err_attribute_argument_n_type)
+        << AL << 1 << AANT_ArgumentIdentifier;
+    return;
+  }
+
+  IdentifierInfo *Ident = AL.getArgAsIdent(0)->Ident;
+  unsigned BuiltinID = Ident->getBuiltinID();
+  StringRef AliasName = cast<FunctionDecl>(D)->getIdentifier()->getName();
+
+  if (!RISCVVAliasValid(BuiltinID, AliasName)) {
+    S.Diag(AL.getLoc(), diag::err_attribute_riscv_builtin_alias);
+    return;
+  }
+
+  D->addAttr(::new (S.Context) RISCVBuiltinAliasAttr(S.Context, AL, Ident));
+}
+
 //===----------------------------------------------------------------------===//
 // Checker-specific attribute handlers.
 //===----------------------------------------------------------------------===//
@@ -8243,6 +8275,10 @@
   case ParsedAttr::AT_EnforceTCBLeaf:
     handleEnforceTCBAttr<EnforceTCBLeafAttr, EnforceTCBAttr>(S, D, AL);
     break;
+
+  case ParsedAttr::AT_RISCVBuiltinAlias:
+    handleRISCVBuiltinAliasAttr(S, D, AL);
+    break;
   }
 }
 
diff --git a/clang/test/CodeGen/RISCV/riscv-attr-builtin-alias.c b/clang/test/CodeGen/RISCV/riscv-attr-builtin-alias.c
new file mode 100644
--- /dev/null
+++ b/clang/test/CodeGen/RISCV/riscv-attr-builtin-alias.c
@@ -0,0 +1,35 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
+// RUN: %clang_cc1 -triple riscv64 -emit-llvm -target-feature +experimental-v \
+// RUN:   %s -o - \
+// RUN:   | FileCheck %s
+
+#include <riscv_vector.h>
+
+#define __rvv_generic \
+static inline __attribute__((__always_inline__, __nodebug__, __overloadable__))
+
+__rvv_generic
+__attribute__((__clang_riscv_builtin_alias(__builtin_rvv_vadd_vv_i8m1)))
+vint8m1_t vadd_generic (vint8m1_t op0, vint8m1_t op1, size_t op2);
+
+// CHECK-LABEL: @test(
+// CHECK-NEXT:  entry:
+// CHECK-NEXT:    [[OP0_ADDR:%.*]] = alloca <vscale x 8 x i8>, align 1
+// CHECK-NEXT:    [[OP1_ADDR:%.*]] = alloca <vscale x 8 x i8>, align 1
+// CHECK-NEXT:    [[VL_ADDR:%.*]] = alloca i64, align 8
+// CHECK-NEXT:    [[RET:%.*]] = alloca <vscale x 8 x i8>, align 1
+// CHECK-NEXT:    store <vscale x 8 x i8> [[OP0:%.*]], <vscale x 8 x i8>* [[OP0_ADDR]], align 1
+// CHECK-NEXT:    store <vscale x 8 x i8> [[OP1:%.*]], <vscale x 8 x i8>* [[OP1_ADDR]], align 1
+// CHECK-NEXT:    store i64 [[VL:%.*]], i64* [[VL_ADDR]], align 8
+// CHECK-NEXT:    [[TMP0:%.*]] = load <vscale x 8 x i8>, <vscale x 8 x i8>* [[OP0_ADDR]], align 1
+// CHECK-NEXT:    [[TMP1:%.*]] = load <vscale x 8 x i8>, <vscale x 8 x i8>* [[OP1_ADDR]], align 1
+// CHECK-NEXT:    [[TMP2:%.*]] = load i64, i64* [[VL_ADDR]], align 8
+// CHECK-NEXT:    [[TMP3:%.*]] = call <vscale x 8 x i8> @llvm.riscv.vadd.nxv8i8.nxv8i8.i64(<vscale x 8 x i8> [[TMP0]], <vscale x 8 x i8> [[TMP1]], i64 [[TMP2]])
+// CHECK-NEXT:    store <vscale x 8 x i8> [[TMP3]], <vscale x 8 x i8>* [[RET]], align 1
+// CHECK-NEXT:    [[TMP4:%.*]] = load <vscale x 8 x i8>, <vscale x 8 x i8>* [[RET]], align 1
+// CHECK-NEXT:    ret <vscale x 8 x i8> [[TMP4]]
+//
+vint8m1_t test(vint8m1_t op0, vint8m1_t op1, size_t vl) {
+  vint8m1_t ret = vadd_generic(op0, op1, vl);
+  return ret;
+}
diff --git a/clang/test/Misc/pragma-attribute-supported-attributes-list.test b/clang/test/Misc/pragma-attribute-supported-attributes-list.test
--- a/clang/test/Misc/pragma-attribute-supported-attributes-list.test
+++ b/clang/test/Misc/pragma-attribute-supported-attributes-list.test
@@ -142,6 +142,7 @@
 // CHECK-NEXT: PassObjectSize (SubjectMatchRule_variable_is_parameter)
 // CHECK-NEXT: PatchableFunctionEntry (SubjectMatchRule_function, SubjectMatchRule_objc_method)
 // CHECK-NEXT: Pointer (SubjectMatchRule_record_not_is_union)
+// CHECK-NEXT: RISCVBuiltinAlias (SubjectMatchRule_function)
 // CHECK-NEXT: ReleaseHandle (SubjectMatchRule_variable_is_parameter)
 // CHECK-NEXT: RenderScriptKernel (SubjectMatchRule_function)
 // CHECK-NEXT: ReqdWorkGroupSize (SubjectMatchRule_function)