diff --git a/compiler-rt/test/profile/Posix/instrprof-gcov-parallel.test b/compiler-rt/test/profile/Posix/instrprof-gcov-parallel.test
--- a/compiler-rt/test/profile/Posix/instrprof-gcov-parallel.test
+++ b/compiler-rt/test/profile/Posix/instrprof-gcov-parallel.test
@@ -10,6 +10,9 @@
 RUN: llvm-cov gcov instrprof-gcov-parallel.target.gcda
 RUN: FileCheck --input-file instrprof-gcov-parallel.target.c.gcov %s
 
+# Bug 42535
+# XFAIL: sparc-target-arch
+
 # Test if the .gcda file is correctly created from one of child processes
 # and counters of all processes are recorded correctly.
 # 707 = CHILDREN * COUNT
diff --git a/compiler-rt/test/ubsan/TestCases/Float/cast-overflow.cpp b/compiler-rt/test/ubsan/TestCases/Float/cast-overflow.cpp
--- a/compiler-rt/test/ubsan/TestCases/Float/cast-overflow.cpp
+++ b/compiler-rt/test/ubsan/TestCases/Float/cast-overflow.cpp
@@ -11,6 +11,9 @@
 // FIXME: not %run %t 8 2>&1 | FileCheck %s --check-prefix=CHECK-8
 // RUN: not %run %t 9 2>&1 | FileCheck %s --check-prefix=CHECK-9
 
+// Bug 42535
+// XFAIL: sparc-target-arch
+
 // This test assumes float and double are IEEE-754 single- and double-precision.
 
 #if defined(__APPLE__)