Index: cfe/trunk/lib/Basic/Targets.cpp
===================================================================
--- cfe/trunk/lib/Basic/Targets.cpp
+++ cfe/trunk/lib/Basic/Targets.cpp
@@ -6251,7 +6251,8 @@
 
   enum FPUModeEnum {
     FPUMode,
-    NeonMode
+    NeonMode = (1 << 0),
+    SveMode = (1 << 1)
   };
 
   unsigned FPU;
@@ -6385,12 +6386,15 @@
     Builder.defineMacro("__ARM_SIZEOF_MINIMAL_ENUM",
                         Opts.ShortEnums ? "1" : "4");
 
-    if (FPU == NeonMode) {
+    if (FPU & NeonMode) {
       Builder.defineMacro("__ARM_NEON", "1");
       // 64-bit NEON supports half, single and double precision operations.
       Builder.defineMacro("__ARM_NEON_FP", "0xE");
     }
 
+    if (FPU & SveMode)
+      Builder.defineMacro("__ARM_FEATURE_SVE", "1");
+
     if (CRC)
       Builder.defineMacro("__ARM_FEATURE_CRC32", "1");
 
@@ -6426,7 +6430,8 @@
     return Feature == "aarch64" ||
       Feature == "arm64" ||
       Feature == "arm" ||
-      (Feature == "neon" && FPU == NeonMode);
+      (Feature == "neon" && (FPU & NeonMode)) ||
+      (Feature == "sve" && (FPU & SveMode));
   }
 
   bool handleTargetFeatures(std::vector<std::string> &Features,
@@ -6440,7 +6445,9 @@
 
     for (const auto &Feature : Features) {
       if (Feature == "+neon")
-        FPU = NeonMode;
+        FPU |= NeonMode;
+      if (Feature == "+sve")
+        FPU |= SveMode;
       if (Feature == "+crc")
         CRC = 1;
       if (Feature == "+crypto")
Index: cfe/trunk/test/Preprocessor/aarch64-target-features.c
===================================================================
--- cfe/trunk/test/Preprocessor/aarch64-target-features.c
+++ cfe/trunk/test/Preprocessor/aarch64-target-features.c
@@ -37,6 +37,7 @@
 // CHECK-NOT: __ARM_PCS_VFP 1
 // CHECK-NOT: __ARM_SIZEOF_MINIMAL_ENUM 1
 // CHECK-NOT: __ARM_SIZEOF_WCHAR_T 2
+// CHECK-NOT: __ARM_FEATURE_SVE
 
 // RUN: %clang -target aarch64_be-eabi -x c -E -dM %s -o - | FileCheck %s -check-prefix CHECK-BIGENDIAN
 // CHECK-BIGENDIAN: __ARM_BIG_ENDIAN 1
@@ -84,6 +85,10 @@
 // CHECK-GENERIC: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+neon"
 
 // RUN: %clang -target aarch64 -mtune=cyclone -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MTUNE-CYCLONE %s
+
+// RUN: %clang -target aarch64-none-linux-gnu -march=armv8-a+sve -x c -E -dM %s -o - | FileCheck --check-prefix=CHECK-SVE %s
+// CHECK-SVE: __ARM_FEATURE_SVE 1
+
 // ================== Check whether -mtune accepts mixed-case features.
 // RUN: %clang -target aarch64 -mtune=CYCLONE -### -c %s 2>&1 | FileCheck -check-prefix=CHECK-MTUNE-CYCLONE %s
 // CHECK-MTUNE-CYCLONE: "-cc1"{{.*}} "-triple" "aarch64{{.*}}" "-target-feature" "+neon" "-target-feature" "+zcm" "-target-feature" "+zcz"