Index: lib/Driver/SanitizerArgs.cpp
===================================================================
--- lib/Driver/SanitizerArgs.cpp
+++ lib/Driver/SanitizerArgs.cpp
@@ -30,7 +30,7 @@
   NeedsUbsanCxxRt = Vptr | CFI,
   NotAllowedWithTrap = Vptr,
   NotAllowedWithMinimalRuntime = Vptr,
-  RequiresPIE = DataFlow | Scudo,
+  RequiresPIE = DataFlow | HWAddress | Scudo,
   NeedsUnwindTables = Address | HWAddress | Thread | Memory | DataFlow,
   SupportsCoverage = Address | HWAddress | KernelAddress | Memory | Leak |
                      Undefined | Integer | Nullability | DataFlow | Fuzzer |
Index: lib/Driver/ToolChains/Linux.cpp
===================================================================
--- lib/Driver/ToolChains/Linux.cpp
+++ lib/Driver/ToolChains/Linux.cpp
@@ -879,7 +879,7 @@
     Res |= SanitizerKind::Function;
   if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsMIPS || IsArmArch)
     Res |= SanitizerKind::Scudo;
-  if (IsAArch64)
+  if (IsX86_64 || IsAArch64)
     Res |= SanitizerKind::HWAddress;
   return Res;
 }
Index: test/Driver/asan.c
===================================================================
--- test/Driver/asan.c
+++ test/Driver/asan.c
@@ -6,10 +6,10 @@
 // RUN: %clang -O1 -target i386-unknown-linux -fsanitize=kernel-address %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-KASAN
 // RUN: %clang -O2 -target i386-unknown-linux -fsanitize=kernel-address %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-KASAN
 // RUN: %clang -O3 -target i386-unknown-linux -fsanitize=kernel-address %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-KASAN
-// RUN: %clang     -target aarch64-unknown-linux -fsanitize=hwaddress %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-HWASAN
-// RUN: %clang -O1 -target aarch64-unknown-linux -fsanitize=hwaddress %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-HWASAN
-// RUN: %clang -O2 -target aarch64-unknown-linux -fsanitize=hwaddress %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-HWASAN
-// RUN: %clang -O3 -target aarch64-unknown-linux -fsanitize=hwaddress %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-HWASAN
+// RUN: %clang     -target x86_64-unknown-linux -fsanitize=hwaddress %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-HWASAN
+// RUN: %clang -O1 -target x86_64-unknown-linux -fsanitize=hwaddress %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-HWASAN
+// RUN: %clang -O2 -target x86_64-unknown-linux -fsanitize=hwaddress %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-HWASAN
+// RUN: %clang -O3 -target x86_64-unknown-linux -fsanitize=hwaddress %s -S -emit-llvm -o - | FileCheck %s --check-prefix=CHECK-HWASAN
 // Verify that -fsanitize={address,kernel-address} invoke ASan and KASan instrumentation.
 
 int foo(int *a) { return *a; }
Index: test/Driver/fsanitize-blacklist.c
===================================================================
--- test/Driver/fsanitize-blacklist.c
+++ test/Driver/fsanitize-blacklist.c
@@ -23,7 +23,7 @@
 // Check that the default blacklist is not added as an extra dependency.
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=address -resource-dir=%S/Inputs/resource_dir %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-DEFAULT-BLACKLIST-ASAN --implicit-check-not=fdepfile-entry --implicit-check-not=-fsanitize-blacklist=
 // CHECK-DEFAULT-BLACKLIST-ASAN: -fsanitize-blacklist={{.*[^w]}}asan_blacklist.txt
-// RUN: %clang -target aarch64-linux-gnu -fsanitize=hwaddress -resource-dir=%S/Inputs/resource_dir %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-DEFAULT-BLACKLIST-HWASAN --implicit-check-not=fdepfile-entry --implicit-check-not=-fsanitize-blacklist=
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=hwaddress -resource-dir=%S/Inputs/resource_dir %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-DEFAULT-BLACKLIST-HWASAN --implicit-check-not=fdepfile-entry --implicit-check-not=-fsanitize-blacklist=
 // CHECK-DEFAULT-BLACKLIST-HWASAN: -fsanitize-blacklist={{.*}}hwasan_blacklist.txt
 
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=integer -resource-dir=%S/Inputs/resource_dir %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-DEFAULT-UBSAN-BLACKLIST --implicit-check-not=fdepfile-entry --implicit-check-not=-fsanitize-blacklist=
Index: test/Driver/fsanitize.c
===================================================================
--- test/Driver/fsanitize.c
+++ test/Driver/fsanitize.c
@@ -83,13 +83,13 @@
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=kernel-address,address -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANKA-SANA
 // CHECK-SANKA-SANA: '-fsanitize=kernel-address' not allowed with '-fsanitize=address'
 
-// RUN: %clang -target aarch64-linux-gnu -fsanitize=hwaddress,thread -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANHA-SANT
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=hwaddress,thread -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANHA-SANT
 // CHECK-SANHA-SANT: '-fsanitize=hwaddress' not allowed with '-fsanitize=thread'
 
-// RUN: %clang -target aarch64-linux-gnu -fsanitize=hwaddress,memory -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANHA-SANM
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=hwaddress,memory -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANHA-SANM
 // CHECK-SANHA-SANM: '-fsanitize=hwaddress' not allowed with '-fsanitize=memory'
 
-// RUN: %clang -target aarch64-linux-gnu -fsanitize=hwaddress,address -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANHA-SANA
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=hwaddress,address -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANHA-SANA
 // CHECK-SANHA-SANA: '-fsanitize=hwaddress' not allowed with '-fsanitize=address'
 
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=kernel-address,leak -pie -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANKA-SANL
@@ -487,7 +487,7 @@
 // RUN: %clang -target x86_64-linux-gnu -fsanitize-trap=address -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ASAN-TRAP
 // CHECK-ASAN-TRAP: error: unsupported argument 'address' to option '-fsanitize-trap'
 
-// RUN: %clang -target aarch64-linux-gnu -fsanitize-trap=hwaddress -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-HWASAN-TRAP
+// RUN: %clang -target x86_64-linux-gnu -fsanitize-trap=hwaddress -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-HWASAN-TRAP
 // CHECK-HWASAN-TRAP: error: unsupported argument 'hwaddress' to option '-fsanitize-trap'
 
 // RUN: %clang -target x86_64-apple-darwin10 -mmacosx-version-min=10.7 -flto -fsanitize=cfi-vcall -fno-sanitize-trap=cfi -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-NOTRAP-OLD-MACOS
@@ -618,7 +618,7 @@
 
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=address -fsanitize-minimal-runtime -fsanitize=undefined %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-ASAN-UBSAN-MINIMAL
 // CHECK-ASAN-UBSAN-MINIMAL: error: invalid argument '-fsanitize-minimal-runtime' not allowed with '-fsanitize=address'
-// RUN: %clang -target aarch64-linux-gnu -fsanitize=hwaddress -fsanitize-minimal-runtime %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-HWASAN-MINIMAL
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=hwaddress -fsanitize-minimal-runtime %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-HWASAN-MINIMAL
 // CHECK-HWASAN-MINIMAL: error: invalid argument '-fsanitize-minimal-runtime' not allowed with '-fsanitize=hwaddress'
 
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=cfi -flto -fvisibility=hidden -fsanitize-minimal-runtime %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CFI-MINIMAL
@@ -663,8 +663,5 @@
 // CHECK-SCUDO-MSAN: error: invalid argument '-fsanitize=scudo' not allowed with '-fsanitize=memory'
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=scudo,thread  %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SCUDO-TSAN
 // CHECK-SCUDO-TSAN: error: invalid argument '-fsanitize=scudo' not allowed with '-fsanitize=thread'
-// RUN: %clang -target aarch64-linux-gnu -fsanitize=scudo,hwaddress  %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SCUDO-HWASAN
+// RUN: %clang -target x86_64-linux-gnu -fsanitize=scudo,hwaddress  %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SCUDO-HWASAN
 // CHECK-SCUDO-HWASAN: error: invalid argument '-fsanitize=scudo' not allowed with '-fsanitize=hwaddress'
-
-// RUN: %clang -target x86_64-linux-gnu -fsanitize=hwaddress %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANHA-X86_64
-// CHECK-SANHA-X86_64: unsupported option '-fsanitize=hwaddress' for target
Index: test/Driver/sanitizer-ld.c
===================================================================
--- test/Driver/sanitizer-ld.c
+++ test/Driver/sanitizer-ld.c
@@ -696,54 +696,94 @@
 // CHECK-SCUDO-ANDROID-STATIC: "-lpthread"
 
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -target aarch64-unknown-linux -fuse-ld=ld -fsanitize=hwaddress \
+// RUN:     -target x86_64-unknown-linux -fuse-ld=ld -fsanitize=hwaddress \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
-// RUN:   | FileCheck --check-prefix=CHECK-HWASAN-LINUX %s
+// RUN:   | FileCheck --check-prefix=CHECK-HWASAN-X86-64-LINUX %s
 //
-// CHECK-HWASAN-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
-// CHECK-HWASAN-LINUX-NOT: "-lc"
-// CHECK-HWASAN-LINUX: libclang_rt.hwasan-aarch64.a"
-// CHECK-HWASAN-LINUX-NOT: "--export-dynamic"
-// CHECK-HWASAN-LINUX: "--dynamic-list={{.*}}libclang_rt.hwasan-aarch64.a.syms"
-// CHECK-HWASAN-LINUX-NOT: "--export-dynamic"
-// CHECK-HWASAN-LINUX: "-lpthread"
-// CHECK-HWASAN-LINUX: "-lrt"
-// CHECK-HWASAN-LINUX: "-ldl"
+// CHECK-HWASAN-X86-64-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
+// CHECK-HWASAN-X86-64-LINUX-NOT: "-lc"
+// CHECK-HWASAN-X86-64-LINUX: libclang_rt.hwasan-x86_64.a"
+// CHECK-HWASAN-X86-64-LINUX-NOT: "--export-dynamic"
+// CHECK-HWASAN-X86-64-LINUX: "--dynamic-list={{.*}}libclang_rt.hwasan-x86_64.a.syms"
+// CHECK-HWASAN-X86-64-LINUX-NOT: "--export-dynamic"
+// CHECK-HWASAN-X86-64-LINUX: "-lpthread"
+// CHECK-HWASAN-X86-64-LINUX: "-lrt"
+// CHECK-HWASAN-X86-64-LINUX: "-ldl"
 
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -target aarch64-unknown-linux -fuse-ld=ld -fsanitize=hwaddress -shared-libsan \
-// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     -target x86_64-unknown-linux -fuse-ld=ld -fsanitize=hwaddress \
+// RUN:     -shared-libsan -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-SHARED-HWASAN-X86-64-LINUX %s
+//
+// CHECK-SHARED-HWASAN-X86-64-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
+// CHECK-SHARED-HWASAN-X86-64-LINUX-NOT: "-lc"
+// CHECK-SHARED-HWASAN-X86-64-LINUX: libclang_rt.hwasan-x86_64.so"
+// CHECK-SHARED-HWASAN-X86-64-LINUX-NOT: "-lpthread"
+// CHECK-SHARED-HWASAN-X86-64-LINUX-NOT: "-lrt"
+// CHECK-SHARED-HWASAN-X86-64-LINUX-NOT: "-ldl"
+// CHECK-SHARED-HWASAN-X86-64-LINUX-NOT: "--export-dynamic"
+// CHECK-SHARED-HWASAN-X86-64-LINUX-NOT: "--dynamic-list"
+
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.so -shared 2>&1 \
+// RUN:     -target x86_64-unknown-linux -fuse-ld=ld -fsanitize=hwaddress \
+// RUN:     -shared-libsan -resource-dir=%S/Inputs/resource_dir \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
-// RUN:   | FileCheck --check-prefix=CHECK-SHARED-HWASAN-LINUX %s
+// RUN:   | FileCheck --check-prefix=CHECK-DSO-SHARED-HWASAN-X86-64-LINUX %s
+//
+// CHECK-DSO-SHARED-HWASAN-X86-64-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
+// CHECK-DSO-SHARED-HWASAN-X86-64-LINUX-NOT: "-lc"
+// CHECK-DSO-SHARED-HWASAN-X86-64-LINUX: libclang_rt.hwasan-x86_64.so"
+// CHECK-DSO-SHARED-HWASAN-X86-64-LINUX-NOT: "-lpthread"
+// CHECK-DSO-SHARED-HWASAN-X86-64-LINUX-NOT: "-lrt"
+// CHECK-DSO-SHARED-HWASAN-X86-64-LINUX-NOT: "-ldl"
+// CHECK-DSO-SHARED-HWASAN-X86-64-LINUX-NOT: "--export-dynamic"
+// CHECK-DSO-SHARED-HWASAN-X86-64-LINUX-NOT: "--dynamic-list"
 
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target aarch64-unknown-linux -fuse-ld=ld -fsanitize=hwaddress \
-// RUN:     -shared-libsan \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
-// RUN:   | FileCheck --check-prefix=CHECK-SHARED-HWASAN-LINUX %s
+// RUN:   | FileCheck --check-prefix=CHECK-HWASAN-AARCH64-LINUX %s
 //
-// CHECK-SHARED-HWASAN-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
-// CHECK-SHARED-HWASAN-LINUX-NOT: "-lc"
-// CHECK-SHARED-HWASAN-LINUX: libclang_rt.hwasan-aarch64.so"
-// CHECK-SHARED-HWASAN-LINUX-NOT: "-lpthread"
-// CHECK-SHARED-HWASAN-LINUX-NOT: "-lrt"
-// CHECK-SHARED-HWASAN-LINUX-NOT: "-ldl"
-// CHECK-SHARED-HWASAN-LINUX-NOT: "--export-dynamic"
-// CHECK-SHARED-HWASAN-LINUX-NOT: "--dynamic-list"
+// CHECK-HWASAN-AARCH64-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
+// CHECK-HWASAN-AARCH64-LINUX-NOT: "-lc"
+// CHECK-HWASAN-AARCH64-LINUX: libclang_rt.hwasan-aarch64.a"
+// CHECK-HWASAN-AARCH64-LINUX-NOT: "--export-dynamic"
+// CHECK-HWASAN-AARCH64-LINUX: "--dynamic-list={{.*}}libclang_rt.hwasan-aarch64.a.syms"
+// CHECK-HWASAN-AARCH64-LINUX-NOT: "--export-dynamic"
+// CHECK-HWASAN-AARCH64-LINUX: "-lpthread"
+// CHECK-HWASAN-AARCH64-LINUX: "-lrt"
+// CHECK-HWASAN-AARCH64-LINUX: "-ldl"
 
-// RUN: %clang -no-canonical-prefixes %s -### -o %t.so -shared 2>&1 \
-// RUN:     -target aarch64-unknown-linux -fuse-ld=ld -fsanitize=hwaddress -shared-libsan \
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target aarch64-unknown-linux -fuse-ld=ld -fsanitize=hwaddress \
+// RUN:     -shared-libsan \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
-// RUN:   | FileCheck --check-prefix=CHECK-DSO-SHARED-HWASAN-LINUX %s
+// RUN:   | FileCheck --check-prefix=CHECK-SHARED-HWASAN-AARCH64-LINUX %s
 //
-// CHECK-DSO-SHARED-HWASAN-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
-// CHECK-DSO-SHARED-HWASAN-LINUX-NOT: "-lc"
-// CHECK-DSO-SHARED-HWASAN-LINUX: libclang_rt.hwasan-aarch64.so"
-// CHECK-DSO-SHARED-HWASAN-LINUX-NOT: "-lpthread"
-// CHECK-DSO-SHARED-HWASAN-LINUX-NOT: "-lrt"
-// CHECK-DSO-SHARED-HWASAN-LINUX-NOT: "-ldl"
-// CHECK-DSO-SHARED-HWASAN-LINUX-NOT: "--export-dynamic"
-// CHECK-DSO-SHARED-HWASAN-LINUX-NOT: "--dynamic-list"
+// CHECK-SHARED-HWASAN-AARCH64-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
+// CHECK-SHARED-HWASAN-AARCH64-LINUX-NOT: "-lc"
+// CHECK-SHARED-HWASAN-AARCH64-LINUX: libclang_rt.hwasan-aarch64.so"
+// CHECK-SHARED-HWASAN-AARCH64-LINUX-NOT: "-lpthread"
+// CHECK-SHARED-HWASAN-AARCH64-LINUX-NOT: "-lrt"
+// CHECK-SHARED-HWASAN-AARCH64-LINUX-NOT: "-ldl"
+// CHECK-SHARED-HWASAN-AARCH64-LINUX-NOT: "--export-dynamic"
+// CHECK-SHARED-HWASAN-AARCH64-LINUX-NOT: "--dynamic-list"
+
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.so -shared 2>&1 \
+// RUN:     -target aarch64-unknown-linux -fuse-ld=ld -fsanitize=hwaddress \
+// RUN:     -shared-libsan -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-DSO-SHARED-HWASAN-AARCH64-LINUX %s
+//
+// CHECK-DSO-SHARED-HWASAN-AARCH64-LINUX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
+// CHECK-DSO-SHARED-HWASAN-AARCH64-LINUX-NOT: "-lc"
+// CHECK-DSO-SHARED-HWASAN-AARCH64-LINUX: libclang_rt.hwasan-aarch64.so"
+// CHECK-DSO-SHARED-HWASAN-AARCH64-LINUX-NOT: "-lpthread"
+// CHECK-DSO-SHARED-HWASAN-AARCH64-LINUX-NOT: "-lrt"
+// CHECK-DSO-SHARED-HWASAN-AARCH64-LINUX-NOT: "-ldl"
+// CHECK-DSO-SHARED-HWASAN-AARCH64-LINUX-NOT: "--export-dynamic"
+// CHECK-DSO-SHARED-HWASAN-AARCH64-LINUX-NOT: "--dynamic-list"