diff --git a/compiler-rt/test/hwasan/TestCases/Linux/atfork.cpp b/compiler-rt/test/hwasan/TestCases/Linux/atfork.cpp
--- a/compiler-rt/test/hwasan/TestCases/Linux/atfork.cpp
+++ b/compiler-rt/test/hwasan/TestCases/Linux/atfork.cpp
@@ -1,6 +1,6 @@
 // RUN: %clang_hwasan -O0 %s -o %t && %run %t 2>&1
 
-// REQUIRES: aarch64-target-arch || x86_64-target-arch
+// REQUIRES: aarch64-target-arch || x86_64-target-arch || riscv64-target-arch
 // REQUIRES: pointer-tagging
 
 #include <assert.h>
diff --git a/compiler-rt/test/hwasan/TestCases/Linux/vfork.c b/compiler-rt/test/hwasan/TestCases/Linux/vfork.c
--- a/compiler-rt/test/hwasan/TestCases/Linux/vfork.c
+++ b/compiler-rt/test/hwasan/TestCases/Linux/vfork.c
@@ -1,7 +1,7 @@
 // https://github.com/google/sanitizers/issues/925
 // RUN: %clang_hwasan -O0 %s -o %t && %run %t 2>&1
 
-// REQUIRES: aarch64-target-arch || x86_64-target-arch
+// REQUIRES: aarch64-target-arch || x86_64-target-arch || riscv64-target-arch
 // REQUIRES: pointer-tagging
 
 #include <assert.h>
diff --git a/compiler-rt/test/hwasan/TestCases/exported-tagged-global.c b/compiler-rt/test/hwasan/TestCases/exported-tagged-global.c
--- a/compiler-rt/test/hwasan/TestCases/exported-tagged-global.c
+++ b/compiler-rt/test/hwasan/TestCases/exported-tagged-global.c
@@ -4,7 +4,10 @@
 // RUN: %run %t
 // RUN: %clang_hwasan -O1 -mllvm --aarch64-enable-global-isel-at-O=1 %s -o %t
 // RUN: %run %t
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
+
+// For now RISC-V doesn't support tagging global variables
+// XFAIL: riscv64-target-arch
 
 static int global;
 
diff --git a/compiler-rt/test/hwasan/TestCases/global-with-reduction.c b/compiler-rt/test/hwasan/TestCases/global-with-reduction.c
--- a/compiler-rt/test/hwasan/TestCases/global-with-reduction.c
+++ b/compiler-rt/test/hwasan/TestCases/global-with-reduction.c
@@ -22,6 +22,9 @@
 
 // REQUIRES: pointer-tagging
 
+// For now RISC-V doesn't support tagging global variables
+// XFAIL: riscv64-target-arch
+
 #include <stdlib.h>
 
 // GlobalOpt may replace the current GV with a new boolean-typed GV. Previously,
diff --git a/compiler-rt/test/hwasan/TestCases/global.c b/compiler-rt/test/hwasan/TestCases/global.c
--- a/compiler-rt/test/hwasan/TestCases/global.c
+++ b/compiler-rt/test/hwasan/TestCases/global.c
@@ -22,6 +22,9 @@
 
 // REQUIRES: pointer-tagging
 
+// For now RISC-V doesn't support tagging global variables
+// XFAIL: riscv64-target-arch
+
 #include <stdlib.h>
 
 int a = 1;
diff --git a/compiler-rt/test/hwasan/TestCases/stack-uas.c b/compiler-rt/test/hwasan/TestCases/stack-uas.c
--- a/compiler-rt/test/hwasan/TestCases/stack-uas.c
+++ b/compiler-rt/test/hwasan/TestCases/stack-uas.c
@@ -40,7 +40,7 @@
 __attribute__((noinline)) char buggy() {
   char *volatile p;
   {
-    char zzz[0x1000];
+    char zzz[0x1000] = {};
     p = zzz;
   }
   return *p;
diff --git a/compiler-rt/test/hwasan/TestCases/tag-mismatch-border-address.c b/compiler-rt/test/hwasan/TestCases/tag-mismatch-border-address.c
--- a/compiler-rt/test/hwasan/TestCases/tag-mismatch-border-address.c
+++ b/compiler-rt/test/hwasan/TestCases/tag-mismatch-border-address.c
@@ -3,7 +3,7 @@
 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK
 
 // REQUIRES: stable-runtime
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 
 #include <sanitizer/hwasan_interface.h>
 #include <stdio.h>
diff --git a/compiler-rt/test/hwasan/TestCases/try-catch.cpp b/compiler-rt/test/hwasan/TestCases/try-catch.cpp
--- a/compiler-rt/test/hwasan/TestCases/try-catch.cpp
+++ b/compiler-rt/test/hwasan/TestCases/try-catch.cpp
@@ -5,7 +5,7 @@
 // RUN: %clangxx_hwasan_oldrt -static-libstdc++ %s -mllvm -hwasan-instrument-landing-pads=0 -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=BAD
 
 // C++ tests on x86_64 require instrumented libc++/libstdc++.
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 
 #include <stdexcept>
 #include <cstdio>
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-capture.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-capture.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-capture.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-capture.cpp
@@ -2,7 +2,7 @@
 
 // RUN: %clangxx_hwasan -mllvm -hwasan-use-after-scope --std=c++11 -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 #include <functional>
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-dtor-order.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-dtor-order.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-dtor-order.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-dtor-order.cpp
@@ -3,7 +3,7 @@
 // RUN: %clangxx_hwasan -mllvm -hwasan-use-after-scope -O1 %s -o %t && \
 // RUN:     not %run %t 2>&1 | FileCheck %s
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 #include <stdio.h>
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-goto.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-goto.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-goto.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-goto.cpp
@@ -5,7 +5,7 @@
 // Function jumps over variable initialization making lifetime analysis
 // ambiguous. Asan should ignore such variable and program must not fail.
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 #include <stdlib.h>
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-if.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-if.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-if.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-if.cpp
@@ -3,7 +3,7 @@
 // RUN: %clangxx_hwasan -mllvm -hwasan-use-after-scope -O1 %s -o %t && \
 // RUN:     not %run %t 2>&1 | FileCheck %s
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 int *p;
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-inlined.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-inlined.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-inlined.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-inlined.cpp
@@ -7,7 +7,7 @@
 // RUN: %clangxx_hwasan -mllvm -hwasan-use-after-scope -O2 %s -o %t && \
 // RUN:     not %run %t 2>&1 | FileCheck %s
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 int *arr;
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-loop-bug.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-loop-bug.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-loop-bug.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-loop-bug.cpp
@@ -3,7 +3,7 @@
 // RUN: %clangxx_hwasan -mllvm -hwasan-use-after-scope -O1 %s -o %t && \
 // RUN:     not %run %t 2>&1 | FileCheck %s
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 volatile int *p;
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-loop-removed.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-loop-removed.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-loop-removed.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-loop-removed.cpp
@@ -3,7 +3,7 @@
 // RUN: %clangxx_hwasan -mllvm -hwasan-use-after-scope -O1 %s -o %t && \
 // RUN:     not %run %t 2>&1 | FileCheck %s
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 #include <stdlib.h>
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-loop.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-loop.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-loop.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-loop.cpp
@@ -3,7 +3,7 @@
 // RUN: %clangxx_hwasan -mllvm -hwasan-use-after-scope -O1 %s -o %t && \
 // RUN:     not %run %t 2>&1 | FileCheck %s
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 int *p[3];
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-nobug.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-nobug.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-nobug.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-nobug.cpp
@@ -2,7 +2,7 @@
 
 // RUN: %clangxx_hwasan -mllvm -hwasan-use-after-scope -O1 %s -o %t && %run %t
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 #include <stdio.h>
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-setjmp.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-setjmp.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-setjmp.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-setjmp.cpp
@@ -1,7 +1,7 @@
 // RUN: %clangxx_hwasan  -mllvm -hwasan-use-stack-safety=0 -mllvm -hwasan-use-after-scope -O2 %s -o %t && \
 // RUN:     %run %t 2>&1
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 #include <sanitizer/hwasan_interface.h>
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-temp.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-temp.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-temp.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-temp.cpp
@@ -3,7 +3,7 @@
 // RUN: %clangxx_hwasan -mllvm -hwasan-use-after-scope -std=c++11 -O1 %s -o %t && \
 // RUN:     not %run %t 2>&1 | FileCheck %s
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 struct IntHolder {
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-temp2.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-temp2.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-temp2.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-temp2.cpp
@@ -3,7 +3,7 @@
 // RUN: %clangxx_hwasan -mllvm -hwasan-use-after-scope -std=c++11 -O1 %s -o %t && \
 // RUN:     not %run %t 2>&1 | FileCheck %s
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 struct IntHolder {
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope-types.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope-types.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope-types.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope-types.cpp
@@ -27,7 +27,7 @@
 // RUN: not %run %t-noexcept 9 2>&1 | FileCheck %s
 // RUN: not %run %t-noexcept 10 2>&1 | FileCheck %s
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 #include <stdlib.h>
diff --git a/compiler-rt/test/hwasan/TestCases/use-after-scope.cpp b/compiler-rt/test/hwasan/TestCases/use-after-scope.cpp
--- a/compiler-rt/test/hwasan/TestCases/use-after-scope.cpp
+++ b/compiler-rt/test/hwasan/TestCases/use-after-scope.cpp
@@ -3,7 +3,7 @@
 // RUN: %clangxx_hwasan -mllvm -hwasan-use-after-scope -O1 %s -o %t && \
 // RUN:     not %run %t 2>&1 | FileCheck %s
 
-// REQUIRES: aarch64-target-arch
+// REQUIRES: aarch64-target-arch || riscv64-target-arch
 // REQUIRES: stable-runtime
 
 volatile int *p = 0;