diff --git a/clang/lib/Basic/Targets/RISCV.h b/clang/lib/Basic/Targets/RISCV.h
--- a/clang/lib/Basic/Targets/RISCV.h
+++ b/clang/lib/Basic/Targets/RISCV.h
@@ -111,7 +111,11 @@
                             DiagnosticsEngine &Diags) override;
 
   bool hasExtIntType() const override { return true; }
+
+  Optional<std::pair<unsigned, unsigned>>
+  getVScaleRange(const LangOptions &LangOpts) const override;
 };
+
 class LLVM_LIBRARY_VISIBILITY RISCV32TargetInfo : public RISCVTargetInfo {
 public:
   RISCV32TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)
diff --git a/clang/lib/Basic/Targets/RISCV.cpp b/clang/lib/Basic/Targets/RISCV.cpp
--- a/clang/lib/Basic/Targets/RISCV.cpp
+++ b/clang/lib/Basic/Targets/RISCV.cpp
@@ -335,6 +335,20 @@
   return true;
 }
 
+Optional<std::pair<unsigned, unsigned>>
+RISCVTargetInfo::getVScaleRange(const LangOptions &LangOpts) const {
+  if (!HasV)
+    return None;
+  // VLEN is defined in v0.10 to be at least 128 bits and at most 65536 bits,
+  // and vscale is VLEN/64.
+  // FIXME: v1.0 removes the minimum value.
+  // FIXME: The backend can be told about the more specific minimum/maximum
+  // VLEN but the frontend can't access this information.
+  unsigned VLENMin = 128;
+  unsigned VLENMax = 65536;
+  return std::make_pair(VLENMin / 64, VLENMax / 64);
+}
+
 bool RISCV32TargetInfo::isValidCPUName(StringRef Name) const {
   return llvm::RISCV::checkCPUKind(llvm::RISCV::parseCPUKind(Name),
                                    /*Is64Bit=*/false);
diff --git a/clang/test/CodeGen/riscv-vscale-range.c b/clang/test/CodeGen/riscv-vscale-range.c
new file mode 100644
--- /dev/null
+++ b/clang/test/CodeGen/riscv-vscale-range.c
@@ -0,0 +1,5 @@
+// RUN: %clang_cc1 -triple riscv64 -target-feature +experimental-v -S -emit-llvm -o - %s | FileCheck %s
+
+// CHECK-LABEL: @func() #0
+// CHECK: attributes #0 = { {{.*}} vscale_range(2,1024) {{.*}} }
+void func() {}