diff --git a/compiler-rt/cmake/Modules/BuiltinTests.cmake b/compiler-rt/cmake/Modules/BuiltinTests.cmake
index 4a123638c8bc..904904d545a5 100644
--- a/compiler-rt/cmake/Modules/BuiltinTests.cmake
+++ b/compiler-rt/cmake/Modules/BuiltinTests.cmake
@@ -74,7 +74,7 @@ function(try_compile_only output)
 
   # Strip quotes from the compile command, as the compiler is not expecting
   # quoted arguments (see discussion on D62063 for when this can come up). If
-  # the quotes were there for arugments with spaces in them, the quotes were
+  # the quotes were there for arguments with spaces in them, the quotes were
   # not going to help since the string gets split on spaces below.
   string(REPLACE "\"" "" test_compile_command "${test_compile_command}")
 
diff --git a/compiler-rt/cmake/config-ix.cmake b/compiler-rt/cmake/config-ix.cmake
index 5fe846d77103..4d3a5ab3d9d1 100644
--- a/compiler-rt/cmake/config-ix.cmake
+++ b/compiler-rt/cmake/config-ix.cmake
@@ -462,7 +462,7 @@ if(APPLE)
     endforeach()
   endif()
 
-  # Explictly disable unsupported Sanitizer configurations.
+  # Explicitly disable unsupported Sanitizer configurations.
   list(REMOVE_ITEM FUZZER_SUPPORTED_OS "watchos")
   list(REMOVE_ITEM FUZZER_SUPPORTED_OS "watchossim")
 
diff --git a/compiler-rt/include/sanitizer/asan_interface.h b/compiler-rt/include/sanitizer/asan_interface.h
index 792ef9cfaa32..9bff21c117b3 100644
--- a/compiler-rt/include/sanitizer/asan_interface.h
+++ b/compiler-rt/include/sanitizer/asan_interface.h
@@ -316,7 +316,7 @@ void *__asan_addr_is_in_fake_stack(void *fake_stack, void *addr, void **beg,
 void __asan_handle_no_return(void);
 
 /// Update allocation stack trace for the given allocation to the current stack
-/// trace. Returns 1 if successfull, 0 if not.
+/// trace. Returns 1 if successful, 0 if not.
 int __asan_update_allocation_context(void* addr);
 
 #ifdef __cplusplus
diff --git a/compiler-rt/include/sanitizer/common_interface_defs.h b/compiler-rt/include/sanitizer/common_interface_defs.h
index cd69285b8d4a..692b8f70c969 100644
--- a/compiler-rt/include/sanitizer/common_interface_defs.h
+++ b/compiler-rt/include/sanitizer/common_interface_defs.h
@@ -28,7 +28,7 @@ typedef struct {
   // Enable sandbox support in sanitizer coverage.
   int coverage_sandboxed;
   // File descriptor to write coverage data to. If -1 is passed, a file will
-  // be pre-opened by __sanitizer_sandobx_on_notify(). This field has no
+  // be pre-opened by __sanitizer_sandbox_on_notify(). This field has no
   // effect if coverage_sandboxed == 0.
   intptr_t coverage_fd;
   // If non-zero, split the coverage data into well-formed blocks. This is
diff --git a/compiler-rt/lib/asan/asan_interceptors.cpp b/compiler-rt/lib/asan/asan_interceptors.cpp
index 5c4f340ea0e9..b28909152e20 100644
--- a/compiler-rt/lib/asan/asan_interceptors.cpp
+++ b/compiler-rt/lib/asan/asan_interceptors.cpp
@@ -581,7 +581,7 @@ INTERCEPTOR(int, atexit, void (*func)()) {
 #if CAN_SANITIZE_LEAKS
   __lsan::ScopedInterceptorDisabler disabler;
 #endif
-  // Avoid calling real atexit as it is unrechable on at least on Linux.
+  // Avoid calling real atexit as it is unreachable on at least on Linux.
   int res = REAL(__cxa_atexit)((void (*)(void *a))func, nullptr, nullptr);
   REAL(__cxa_atexit)(AtCxaAtexit, nullptr, nullptr);
   return res;
diff --git a/compiler-rt/lib/asan/asan_report.cpp b/compiler-rt/lib/asan/asan_report.cpp
index bce43ea0f9c3..271d89640383 100644
--- a/compiler-rt/lib/asan/asan_report.cpp
+++ b/compiler-rt/lib/asan/asan_report.cpp
@@ -155,7 +155,7 @@ class ScopedInErrorReport {
       DumpProcessMap();
 
     // Copy the message buffer so that we could start logging without holding a
-    // lock that gets aquired during printing.
+    // lock that gets acquired during printing.
     InternalMmapVector<char> buffer_copy(kErrorMessageBufferSize);
     {
       Lock l(&error_message_buf_mutex);
diff --git a/compiler-rt/lib/asan/tests/asan_interface_test.cpp b/compiler-rt/lib/asan/tests/asan_interface_test.cpp
index ffc3226b643c..47cbf0e8927f 100644
--- a/compiler-rt/lib/asan/tests/asan_interface_test.cpp
+++ b/compiler-rt/lib/asan/tests/asan_interface_test.cpp
@@ -90,7 +90,7 @@ TEST(AddressSanitizerInterface, GetCurrentAllocatedBytesTest) {
 TEST(AddressSanitizerInterface, GetHeapSizeTest) {
   // ASan allocator does not keep huge chunks in free list, but unmaps them.
   // The chunk should be greater than the quarantine size,
-  // otherwise it will be stuck in quarantine instead of being unmaped.
+  // otherwise it will be stuck in quarantine instead of being unmapped.
   static const size_t kLargeMallocSize = (1 << 28) + 1;  // 256M
   free(Ident(malloc(kLargeMallocSize)));  // Drain quarantine.
   size_t old_heap_size = __sanitizer_get_heap_size();
diff --git a/compiler-rt/lib/builtins/README.txt b/compiler-rt/lib/builtins/README.txt
index d66d725e7ab5..53d656d5086d 100644
--- a/compiler-rt/lib/builtins/README.txt
+++ b/compiler-rt/lib/builtins/README.txt
@@ -271,8 +271,8 @@ switchu8
 
 // There is no C interface to the *_vfp_d8_d15_regs functions.  There are
 // called in the prolog and epilog of Thumb1 functions.  When the C++ ABI use
-// SJLJ for exceptions, each function with a catch clause or destuctors needs
-// to save and restore all registers in it prolog and epliog.  But there is 
+// SJLJ for exceptions, each function with a catch clause or destructors needs
+// to save and restore all registers in it prolog and epilog.  But there is
 // no way to access vector and high float registers from thumb1 code, so the 
 // compiler must add call outs to these helper functions in the prolog and 
 // epilog.
@@ -311,9 +311,9 @@ double __floatsidfvfp(int a);           // Appears to convert from
 float __floatsisfvfp(int a);            // Appears to convert from
                                         //     int to float.
 double __floatunssidfvfp(unsigned int a); // Appears to convert from
-                                        //     unisgned int to double.
+                                        //     unsigned int to double.
 float __floatunssisfvfp(unsigned int a); // Appears to convert from
-                                        //     unisgned int to float.
+                                        //     unsigned int to float.
 int __gedf2vfp(double a, double b);     // Appears to return __gedf2
                                         //     (a >= b)
 int __gesf2vfp(float a, float b);       // Appears to return __gesf2
diff --git a/compiler-rt/lib/builtins/arm/truncdfsf2vfp.S b/compiler-rt/lib/builtins/arm/truncdfsf2vfp.S
index a3c0a73466e9..e1c171262a78 100644
--- a/compiler-rt/lib/builtins/arm/truncdfsf2vfp.S
+++ b/compiler-rt/lib/builtins/arm/truncdfsf2vfp.S
@@ -11,9 +11,9 @@
 //
 // extern float __truncdfsf2vfp(double a);
 //
-// Converts double precision float to signle precision result.
+// Converts double precision float to single precision result.
 // Uses Darwin calling convention where a double precision parameter is
-// passed in a R0/R1 pair and a signle precision result is returned in R0.
+// passed in a R0/R1 pair and a single precision result is returned in R0.
 //
 	.syntax unified
 	.p2align 2
diff --git a/compiler-rt/lib/builtins/emutls.c b/compiler-rt/lib/builtins/emutls.c
index 88af348c9e22..e112fdf51440 100644
--- a/compiler-rt/lib/builtins/emutls.c
+++ b/compiler-rt/lib/builtins/emutls.c
@@ -150,7 +150,7 @@ static void win_error(DWORD last_err, const char *hint) {
                      NULL, last_err, 0, (LPSTR)&buffer, 1, NULL)) {
     fprintf(stderr, "Windows error: %s\n", buffer);
   } else {
-    fprintf(stderr, "Unkown Windows error: %s\n", hint);
+    fprintf(stderr, "Unknown Windows error: %s\n", hint);
   }
   LocalFree(buffer);
 }
diff --git a/compiler-rt/lib/builtins/fixunsxfdi.c b/compiler-rt/lib/builtins/fixunsxfdi.c
index 097a4e55e931..c8a8061b2cf0 100644
--- a/compiler-rt/lib/builtins/fixunsxfdi.c
+++ b/compiler-rt/lib/builtins/fixunsxfdi.c
@@ -26,7 +26,7 @@
 // mmmm mmmm mmmm
 
 #if defined(_MSC_VER) && !defined(__clang__)
-// MSVC throws a warning about 'unitialized variable use' here,
+// MSVC throws a warning about 'uninitialized variable use' here,
 // disable it for builds that warn-as-error
 #pragma warning(push)
 #pragma warning(disable : 4700)
diff --git a/compiler-rt/lib/builtins/fixunsxfsi.c b/compiler-rt/lib/builtins/fixunsxfsi.c
index 3bc1288d38a1..154abcbd35e7 100644
--- a/compiler-rt/lib/builtins/fixunsxfsi.c
+++ b/compiler-rt/lib/builtins/fixunsxfsi.c
@@ -26,7 +26,7 @@
 // mmmm mmmm mmmm
 
 #if defined(_MSC_VER) && !defined(__clang__)
-// MSVC throws a warning about 'unitialized variable use' here,
+// MSVC throws a warning about 'uninitialized variable use' here,
 // disable it for builds that warn-as-error
 #pragma warning(push)
 #pragma warning(disable : 4700)
diff --git a/compiler-rt/lib/builtins/fixxfdi.c b/compiler-rt/lib/builtins/fixxfdi.c
index a7a0464feb9d..86cf3767b75d 100644
--- a/compiler-rt/lib/builtins/fixxfdi.c
+++ b/compiler-rt/lib/builtins/fixxfdi.c
@@ -25,7 +25,7 @@
 // mmmm mmmm mmmm
 
 #if defined(_MSC_VER) && !defined(__clang__)
-// MSVC throws a warning about 'unitialized variable use' here,
+// MSVC throws a warning about 'uninitialized variable use' here,
 // disable it for builds that warn-as-error
 #pragma warning(push)
 #pragma warning(disable : 4700)
diff --git a/compiler-rt/lib/dfsan/done_abilist.txt b/compiler-rt/lib/dfsan/done_abilist.txt
index 4dd0a86d66a5..eef7c48948cc 100644
--- a/compiler-rt/lib/dfsan/done_abilist.txt
+++ b/compiler-rt/lib/dfsan/done_abilist.txt
@@ -269,7 +269,7 @@ fun:strrchr=custom
 fun:strstr=custom
 
 # Functions which take action based on global state, such as running a callback
-# set by a sepperate function.
+# set by a separate function.
 fun:write=custom
 
 # Functions that take a callback (wrap the callback manually).
diff --git a/compiler-rt/lib/fuzzer/CMakeLists.txt b/compiler-rt/lib/fuzzer/CMakeLists.txt
index 1da8228fa75d..b44569d01ea5 100644
--- a/compiler-rt/lib/fuzzer/CMakeLists.txt
+++ b/compiler-rt/lib/fuzzer/CMakeLists.txt
@@ -77,7 +77,7 @@ endif()
 
 if(MSVC)
   # Silence warnings by turning off exceptions in MSVC headers and avoid an
-  # error by unecessarily defining thread_local when it isn't even used on
+  # error by unnecessarily defining thread_local when it isn't even used on
   # Windows.
   list(APPEND LIBFUZZER_CFLAGS -D_HAS_EXCEPTIONS=0)
 else()
diff --git a/compiler-rt/lib/fuzzer/FuzzerDataFlowTrace.cpp b/compiler-rt/lib/fuzzer/FuzzerDataFlowTrace.cpp
index 24e77fea154a..2f9a4d2d7adc 100644
--- a/compiler-rt/lib/fuzzer/FuzzerDataFlowTrace.cpp
+++ b/compiler-rt/lib/fuzzer/FuzzerDataFlowTrace.cpp
@@ -37,7 +37,7 @@ bool BlockCoverage::AppendCoverage(const std::string &S) {
 // Coverage lines have this form:
 // CN X Y Z T
 // where N is the number of the function, T is the total number of instrumented
-// BBs, and X,Y,Z, if present, are the indecies of covered BB.
+// BBs, and X,Y,Z, if present, are the indices of covered BB.
 // BB #0, which is the entry block, is not explicitly listed.
 bool BlockCoverage::AppendCoverage(std::istream &IN) {
   std::string L;
diff --git a/compiler-rt/lib/fuzzer/FuzzerFork.cpp b/compiler-rt/lib/fuzzer/FuzzerFork.cpp
index 2cc4f5158c02..f7a17fdc6525 100644
--- a/compiler-rt/lib/fuzzer/FuzzerFork.cpp
+++ b/compiler-rt/lib/fuzzer/FuzzerFork.cpp
@@ -358,7 +358,7 @@ void FuzzWithFork(Random &Rand, const FuzzingOptions &Options,
 
     Env.RunOneMergeJob(Job.get());
 
-    // Continue if our crash is one of the ignorred ones.
+    // Continue if our crash is one of the ignored ones.
     if (Options.IgnoreTimeouts && ExitCode == Options.TimeoutExitCode)
       Env.NumTimeouts++;
     else if (Options.IgnoreOOMs && ExitCode == Options.OOMExitCode)
diff --git a/compiler-rt/lib/fuzzer/FuzzerMerge.cpp b/compiler-rt/lib/fuzzer/FuzzerMerge.cpp
index 405adae4db3d..4bae7827f80b 100644
--- a/compiler-rt/lib/fuzzer/FuzzerMerge.cpp
+++ b/compiler-rt/lib/fuzzer/FuzzerMerge.cpp
@@ -378,7 +378,7 @@ void CrashResistantMerge(const std::vector<std::string> &Args,
     }
     auto ExitCode = ExecuteCommand(Cmd);
     if (!ExitCode) {
-      VPrintf(V, "MERGE-OUTER: succesfull in %zd attempt(s)\n", Attempt);
+      VPrintf(V, "MERGE-OUTER: successful in %zd attempt(s)\n", Attempt);
       break;
     }
   }
diff --git a/compiler-rt/lib/fuzzer/FuzzerTracePC.cpp b/compiler-rt/lib/fuzzer/FuzzerTracePC.cpp
index 301d0c0ba4df..53e3a69884e4 100644
--- a/compiler-rt/lib/fuzzer/FuzzerTracePC.cpp
+++ b/compiler-rt/lib/fuzzer/FuzzerTracePC.cpp
@@ -398,7 +398,7 @@ static size_t InternalStrnlen(const char *S, size_t MaxLen) {
 }
 
 // Finds min of (strlen(S1), strlen(S2)).
-// Needed bacause one of these strings may actually be non-zero terminated.
+// Needed because one of these strings may actually be non-zero terminated.
 static size_t InternalStrnlen2(const char *S1, const char *S2) {
   size_t Len = 0;
   for (; S1[Len] && S2[Len]; Len++)  {}
diff --git a/compiler-rt/lib/interception/interception_win.cpp b/compiler-rt/lib/interception/interception_win.cpp
index 98bc756ae53a..635499c2b385 100644
--- a/compiler-rt/lib/interception/interception_win.cpp
+++ b/compiler-rt/lib/interception/interception_win.cpp
@@ -56,7 +56,7 @@
 //                                      tramp:  jmp QWORD [addr]
 //                                       addr:  .bytes <hook>
 //
-//    Note: <real> is equilavent to <label>.
+//    Note: <real> is equivalent to <label>.
 //
 // 3) HotPatch
 //
diff --git a/compiler-rt/lib/msan/msan.h b/compiler-rt/lib/msan/msan.h
index 963b94a54087..4b2cec31756a 100644
--- a/compiler-rt/lib/msan/msan.h
+++ b/compiler-rt/lib/msan/msan.h
@@ -121,7 +121,7 @@ const MappingDesc kMemoryLayout[] = {
     // The mappings below are used only for 48-bits VMA.
     // TODO(unknown): 48-bit mapping ony covers the usual PIE, non-PIE
     // segments and some more segments totalizing 262144GB of VMA (which cover
-    // only 0.32% of all 48-bit VMA). Memory avaliability can be increase by
+    // only 0.32% of all 48-bit VMA). Memory availability can be increase by
     // adding multiple application segments like 39 and 42 mapping.
     {0x0040000000000ULL, 0x0041000000000ULL, MappingDesc::INVALID, "invalid"},
     {0x0041000000000ULL, 0x0042000000000ULL, MappingDesc::APP, "app-10"},
@@ -219,7 +219,7 @@ const MappingDesc kMemoryLayout[] = {
 #elif SANITIZER_NETBSD || (SANITIZER_LINUX && SANITIZER_WORDSIZE == 64)
 
 #ifdef MSAN_LINUX_X86_64_OLD_MAPPING
-// Requries PIE binary and ASLR enabled.
+// Requires PIE binary and ASLR enabled.
 // Main thread stack and DSOs at 0x7f0000000000 (sometimes 0x7e0000000000).
 // Heap at 0x600000000000.
 const MappingDesc kMemoryLayout[] = {
diff --git a/compiler-rt/lib/msan/msan_interceptors.cpp b/compiler-rt/lib/msan/msan_interceptors.cpp
index b82f7c60dc89..e61b24fd47ea 100644
--- a/compiler-rt/lib/msan/msan_interceptors.cpp
+++ b/compiler-rt/lib/msan/msan_interceptors.cpp
@@ -1144,7 +1144,7 @@ INTERCEPTOR(int, __cxa_atexit, void (*func)(void *), void *arg,
 
 // Unpoison argument shadow for C++ module destructors.
 INTERCEPTOR(int, atexit, void (*func)()) {
-  // Avoid calling real atexit as it is unrechable on at least on Linux.
+  // Avoid calling real atexit as it is unreachable on at least on Linux.
   if (msan_init_is_running)
     return REAL(__cxa_atexit)((void (*)(void *a))func, 0, 0);
   return setup_at_exit_wrapper((void(*)())func, 0, 0);
diff --git a/compiler-rt/lib/msan/msan_interface_internal.h b/compiler-rt/lib/msan/msan_interface_internal.h
index 1edacbc7504f..c72c91c3c160 100644
--- a/compiler-rt/lib/msan/msan_interface_internal.h
+++ b/compiler-rt/lib/msan/msan_interface_internal.h
@@ -31,7 +31,7 @@ SANITIZER_INTERFACE_ATTRIBUTE
 void __msan_warning();
 
 // Print a warning and die.
-// Intrumentation inserts calls to this function when building in "fast" mode
+// Instrumentation inserts calls to this function when building in "fast" mode
 // (i.e. -mllvm -msan-keep-going)
 SANITIZER_INTERFACE_ATTRIBUTE __attribute__((noreturn))
 void __msan_warning_noreturn();
diff --git a/compiler-rt/lib/profile/InstrProfiling.h b/compiler-rt/lib/profile/InstrProfiling.h
index 2e601b8ccb52..3fbee92ea5e4 100644
--- a/compiler-rt/lib/profile/InstrProfiling.h
+++ b/compiler-rt/lib/profile/InstrProfiling.h
@@ -150,7 +150,7 @@ int __llvm_profile_write_file(void);
 int __llvm_orderfile_write_file(void);
 /*!
  * \brief this is a wrapper interface to \c __llvm_profile_write_file.
- * After this interface is invoked, a arleady dumped flag will be set
+ * After this interface is invoked, an already dumped flag will be set
  * so that profile won't be dumped again during program exit.
  * Invocation of interface __llvm_profile_reset_counters will clear
  * the flag. This interface is designed to be used to collect profile
diff --git a/compiler-rt/lib/profile/InstrProfilingInternal.h b/compiler-rt/lib/profile/InstrProfilingInternal.h
index ffa790a4cb66..1394ea8c42f8 100644
--- a/compiler-rt/lib/profile/InstrProfilingInternal.h
+++ b/compiler-rt/lib/profile/InstrProfilingInternal.h
@@ -145,8 +145,8 @@ typedef struct VPDataReaderType {
                                         uint32_t N);
 } VPDataReaderType;
 
-/* Write profile data to destinitation. If SkipNameDataWrite is set to 1,
-   the name data is already in destintation, we just skip over it. */
+/* Write profile data to destination. If SkipNameDataWrite is set to 1,
+   the name data is already in destination, we just skip over it. */
 int lprofWriteData(ProfDataWriter *Writer, VPDataReaderType *VPDataReader,
                    int SkipNameDataWrite);
 int lprofWriteDataImpl(ProfDataWriter *Writer,
diff --git a/compiler-rt/lib/profile/InstrProfilingValue.c b/compiler-rt/lib/profile/InstrProfilingValue.c
index 7f368b9f8d4e..08197fdd9ea2 100644
--- a/compiler-rt/lib/profile/InstrProfilingValue.c
+++ b/compiler-rt/lib/profile/InstrProfilingValue.c
@@ -253,7 +253,7 @@ __llvm_profile_instrument_memop(uint64_t TargetValue, void *Data,
 /*
  * A wrapper struct that represents value profile runtime data.
  * Like InstrProfRecord class which is used by profiling host tools,
- * ValueProfRuntimeRecord also implements the abstract intefaces defined in
+ * ValueProfRuntimeRecord also implements the abstract interfaces defined in
  * ValueProfRecordClosure so that the runtime data can be serialized using
  * shared C implementation.
  */
diff --git a/compiler-rt/lib/profile/InstrProfilingWriter.c b/compiler-rt/lib/profile/InstrProfilingWriter.c
index 5ed968f21839..9cb05570989d 100644
--- a/compiler-rt/lib/profile/InstrProfilingWriter.c
+++ b/compiler-rt/lib/profile/InstrProfilingWriter.c
@@ -32,7 +32,7 @@ static uint32_t VPDataArraySize = sizeof(VPDataArray) / sizeof(*VPDataArray);
 COMPILER_RT_VISIBILITY uint8_t *DynamicBufferIOBuffer = 0;
 COMPILER_RT_VISIBILITY uint32_t VPBufferSize = 0;
 
-/* The buffer writer is reponsponsible in keeping writer state
+/* The buffer writer is responsible in keeping writer state
  * across the call.
  */
 COMPILER_RT_VISIBILITY uint32_t lprofBufferWriter(ProfDataWriter *This,
diff --git a/compiler-rt/lib/sanitizer_common/sancov_flags.inc b/compiler-rt/lib/sanitizer_common/sancov_flags.inc
index cca33fc359f4..de9ede217fc3 100644
--- a/compiler-rt/lib/sanitizer_common/sancov_flags.inc
+++ b/compiler-rt/lib/sanitizer_common/sancov_flags.inc
@@ -14,7 +14,7 @@
 #endif
 
 SANCOV_FLAG(bool, symbolize, true,
-            "If set, converage information will be symbolized by sancov tool "
+            "If set, coverage information will be symbolized by sancov tool "
             "after dumping.")
 
 SANCOV_FLAG(bool, help, false, "Print flags help.")
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_allocator_primary64.h b/compiler-rt/lib/sanitizer_common/sanitizer_allocator_primary64.h
index fa6ba64b08e9..3710947e78cd 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_allocator_primary64.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_allocator_primary64.h
@@ -625,7 +625,7 @@ class SizeClassAllocator64 {
 
   static const uptr kRegionSize = kSpaceSize / kNumClassesRounded;
   // FreeArray is the array of free-d chunks (stored as 4-byte offsets).
-  // In the worst case it may reguire kRegionSize/SizeClassMap::kMinSize
+  // In the worst case it may require kRegionSize/SizeClassMap::kMinSize
   // elements, but in reality this will not happen. For simplicity we
   // dedicate 1/8 of the region's virtual space to FreeArray.
   static const uptr kFreeArraySize = kRegionSize / 8;
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_asm.h b/compiler-rt/lib/sanitizer_common/sanitizer_asm.h
index 81c10c53239a..b544542c26a7 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_asm.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_asm.h
@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// Various support for assemebler.
+// Various support for assembler.
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_atomic_clang_mips.h b/compiler-rt/lib/sanitizer_common/sanitizer_atomic_clang_mips.h
index 2b39097112d4..f3d3052e5b7c 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_atomic_clang_mips.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_atomic_clang_mips.h
@@ -18,7 +18,7 @@ namespace __sanitizer {
 
 // MIPS32 does not support atomics > 4 bytes. To address this lack of
 // functionality, the sanitizer library provides helper methods which use an
-// internal spin lock mechanism to emulate atomic oprations when the size is
+// internal spin lock mechanism to emulate atomic operations when the size is
 // 8 bytes.
 static void __spin_lock(volatile int *lock) {
   while (__sync_lock_test_and_set(lock, 1))
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_local_address_space_view.h b/compiler-rt/lib/sanitizer_common/sanitizer_local_address_space_view.h
index 0e19c4d4a801..a47cfc945cd8 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_local_address_space_view.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_local_address_space_view.h
@@ -17,7 +17,7 @@
 // instantiated with the `LocalAddressSpaceView` type. This type is used to
 // load any pointers in instance methods. This implementation is effectively
 // a no-op. When an object is to be used in an out-of-process manner it is
-// instansiated with the `RemoteAddressSpaceView` type.
+// instantiated with the `RemoteAddressSpaceView` type.
 //
 // By making `AddressSpaceView` a template parameter of an object, it can
 // change its implementation at compile time which has no run time overhead.
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cpp
index 637a93d1398b..4707c6c5d00b 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace.cpp
@@ -65,7 +65,7 @@ void BufferedStackTrace::Init(const uptr *pcs, uptr cnt, uptr extra_top_pc) {
   top_frame_bp = 0;
 }
 
-// Sparc implemention is in its own file.
+// Sparc implementation is in its own file.
 #if !defined(__sparc__)
 
 // In GCC on ARM bp points to saved lr, not fp, so we should check the next
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_sparc.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_sparc.cpp
index 34190fb1bbb2..1e635a66978f 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_sparc.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_stacktrace_sparc.cpp
@@ -9,7 +9,7 @@
 // This file is shared between AddressSanitizer and ThreadSanitizer
 // run-time libraries.
 //
-// Implemention of fast stack unwinding for Sparc.
+// Implementation of fast stack unwinding for Sparc.
 //===----------------------------------------------------------------------===//
 
 #if defined(__sparc__)
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_internal.h b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_internal.h
index 71de1758b3e9..b8670941a05e 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_internal.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_internal.h
@@ -21,7 +21,7 @@ namespace __sanitizer {
 
 // Parsing helpers, 'str' is searched for delimiter(s) and a string or uptr
 // is extracted. When extracting a string, a newly allocated (using
-// InternalAlloc) and null-terminataed buffer is returned. They return a pointer
+// InternalAlloc) and null-terminated buffer is returned. They return a pointer
 // to the next characted after the found delimiter.
 const char *ExtractToken(const char *str, const char *delims, char **result);
 const char *ExtractInt(const char *str, const char *delims, int *result);
diff --git a/compiler-rt/lib/scudo/CMakeLists.txt b/compiler-rt/lib/scudo/CMakeLists.txt
index 7a2505726dfc..995e853e2a4d 100644
--- a/compiler-rt/lib/scudo/CMakeLists.txt
+++ b/compiler-rt/lib/scudo/CMakeLists.txt
@@ -30,7 +30,7 @@ if(ANDROID)
   endif()
 endif()
 
-# The minimal Scudo runtime does not inlude the UBSan runtime.
+# The minimal Scudo runtime does not include the UBSan runtime.
 set(SCUDO_MINIMAL_OBJECT_LIBS
   RTSanitizerCommonNoTermination
   RTSanitizerCommonLibc
diff --git a/compiler-rt/lib/tsan/rtl/tsan_clock.cpp b/compiler-rt/lib/tsan/rtl/tsan_clock.cpp
index 61848c21d162..d122b67c0aaa 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_clock.cpp
+++ b/compiler-rt/lib/tsan/rtl/tsan_clock.cpp
@@ -72,9 +72,9 @@
 // clk_ - variable size vector clock, low kClkBits hold timestamp,
 //   the remaining bits hold "acquired" flag (the actual value is thread's
 //   reused counter);
-//   if acquried == thr->reused_, then the respective thread has already
+//   if acquired == thr->reused_, then the respective thread has already
 //   acquired this clock (except possibly for dirty elements).
-// dirty_ - holds up to two indeces in the vector clock that other threads
+// dirty_ - holds up to two indices in the vector clock that other threads
 //   need to acquire regardless of "acquired" flag value;
 // release_store_tid_ - denotes that the clock state is a result of
 //   release-store operation by the thread with release_store_tid_ index.
@@ -272,7 +272,7 @@ void ThreadClock::ReleaseStore(ClockCache *c, SyncClock *dst) {
     // we could update the existing clock and cache it, or replace it with the
     // currently cached clock and release the old one. And for a shared
     // existing clock, we could replace it with the currently cached;
-    // or unshare, update and cache. But, for simplicity, we currnetly reuse
+    // or unshare, update and cache. But, for simplicity, we currently reuse
     // cached clock only when the target clock is empty.
     dst->tab_ = ctx->clock_alloc.Map(cached_idx_);
     dst->tab_idx_ = cached_idx_;
@@ -285,7 +285,7 @@ void ThreadClock::ReleaseStore(ClockCache *c, SyncClock *dst) {
     dst->dirty_[0].epoch = clk_[tid_];
     dst->release_store_tid_ = tid_;
     dst->release_store_reused_ = reused_;
-    // Rememeber that we don't need to acquire it in future.
+    // Remember that we don't need to acquire it in future.
     dst->elem(tid_).reused = reused_;
     // Grab a reference.
     atomic_fetch_add(ref_ptr(dst->tab_), 1, memory_order_relaxed);
@@ -316,7 +316,7 @@ void ThreadClock::ReleaseStore(ClockCache *c, SyncClock *dst) {
   for (uptr i = 0; i < kDirtyTids; i++) dst->dirty_[i].set_tid(kInvalidTid);
   dst->release_store_tid_ = tid_;
   dst->release_store_reused_ = reused_;
-  // Rememeber that we don't need to acquire it in future.
+  // Remember that we don't need to acquire it in future.
   dst->elem(tid_).reused = reused_;
 
   // If the resulting clock is cachable, cache it for future release operations.
diff --git a/compiler-rt/lib/tsan/rtl/tsan_clock.h b/compiler-rt/lib/tsan/rtl/tsan_clock.h
index 31376a1bc9e2..11cbc0c0b86b 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_clock.h
+++ b/compiler-rt/lib/tsan/rtl/tsan_clock.h
@@ -213,7 +213,7 @@ class ThreadClock {
   // We reuse it for subsequent store-release operations without intervening
   // acquire operations. Since it is shared (and thus constant), clock value
   // for the current thread is then stored in dirty entries in the SyncClock.
-  // We host a refernece to the table while it is cached here.
+  // We host a reference to the table while it is cached here.
   u32 cached_idx_;
   u16 cached_size_;
   u16 cached_blocks_;
diff --git a/compiler-rt/lib/tsan/rtl/tsan_interceptors_mac.cpp b/compiler-rt/lib/tsan/rtl/tsan_interceptors_mac.cpp
index 6cbbea120182..ed064150d005 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_interceptors_mac.cpp
+++ b/compiler-rt/lib/tsan/rtl/tsan_interceptors_mac.cpp
@@ -405,8 +405,8 @@ TSAN_INTERCEPTOR(int, swapcontext, ucontext_t *oucp, const ucontext_t *ucp) {
   {
     SCOPED_INTERCEPTOR_RAW(swapcontext, oucp, ucp);
   }
-  // Bacause of swapcontext() semantics we have no option but to copy its
-  // impementation here
+  // Because of swapcontext() semantics we have no option but to copy its
+  // implementation here
   if (!oucp || !ucp) {
     errno = EINVAL;
     return -1;
diff --git a/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp b/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
index 570ad894d77e..c54db86b6105 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
+++ b/compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
@@ -1961,7 +1961,7 @@ static void CallUserSignalHandler(ThreadState *thr, bool sync, bool acquire,
     Acquire(thr, 0, (uptr)&sigactions[sig]);
   // Signals are generally asynchronous, so if we receive a signals when
   // ignores are enabled we should disable ignores. This is critical for sync
-  // and interceptors, because otherwise we can miss syncronization and report
+  // and interceptors, because otherwise we can miss synchronization and report
   // false races.
   int ignore_reads_and_writes = thr->ignore_reads_and_writes;
   int ignore_interceptors = thr->ignore_interceptors;
diff --git a/compiler-rt/lib/tsan/rtl/tsan_platform_linux.cpp b/compiler-rt/lib/tsan/rtl/tsan_platform_linux.cpp
index b5a3cdf07493..902b6376c0fa 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_platform_linux.cpp
+++ b/compiler-rt/lib/tsan/rtl/tsan_platform_linux.cpp
@@ -332,7 +332,7 @@ int ExtractResolvFDs(void *state, int *fds, int nfd) {
 }
 
 // Extract file descriptors passed via UNIX domain sockets.
-// This is requried to properly handle "open" of these fds.
+// This is required to properly handle "open" of these fds.
 // see 'man recvmsg' and 'man 3 cmsg'.
 int ExtractRecvmsgFDs(void *msgp, int *fds, int nfd) {
   int res = 0;
diff --git a/compiler-rt/lib/tsan/rtl/tsan_rtl.cpp b/compiler-rt/lib/tsan/rtl/tsan_rtl.cpp
index 6dc0791f53d0..f8bd5b0dacb1 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_rtl.cpp
+++ b/compiler-rt/lib/tsan/rtl/tsan_rtl.cpp
@@ -285,7 +285,7 @@ void MapShadow(uptr addr, uptr size) {
                                  "meta shadow"))
       Die();
   } else {
-    // Mapping continous heap.
+    // Mapping continuous heap.
     // Windows wants 64K alignment.
     meta_begin = RoundDownTo(meta_begin, 64 << 10);
     meta_end = RoundUpTo(meta_end, 64 << 10);
diff --git a/compiler-rt/lib/xray/tests/unit/function_call_trie_test.cpp b/compiler-rt/lib/xray/tests/unit/function_call_trie_test.cpp
index b33cc57895ad..c90d6637fff5 100644
--- a/compiler-rt/lib/xray/tests/unit/function_call_trie_test.cpp
+++ b/compiler-rt/lib/xray/tests/unit/function_call_trie_test.cpp
@@ -280,8 +280,8 @@ TEST(FunctionCallTrieTest, MergeInto) {
 
   // We use a different allocator here to make sure that we're able to transfer
   // data into a FunctionCallTrie which uses a different allocator. This
-  // reflects the inteded usage scenario for when we're collecting profiles that
-  // aggregate across threads.
+  // reflects the intended usage scenario for when we're collecting profiles
+  // that aggregate across threads.
   auto B = FunctionCallTrie::InitAllocators();
   FunctionCallTrie Merged(B);
 
diff --git a/compiler-rt/lib/xray/xray_basic_flags.h b/compiler-rt/lib/xray/xray_basic_flags.h
index 2459effa8bae..b846c1233e8a 100644
--- a/compiler-rt/lib/xray/xray_basic_flags.h
+++ b/compiler-rt/lib/xray/xray_basic_flags.h
@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file is a part of XRay, a dynamic runtime instruementation system.
+// This file is a part of XRay, a dynamic runtime instrumentation system.
 //
 // XRay Basic Mode runtime flags.
 //===----------------------------------------------------------------------===//
diff --git a/compiler-rt/lib/xray/xray_buffer_queue.cpp b/compiler-rt/lib/xray/xray_buffer_queue.cpp
index bad91e036cef..748708ccd0f4 100644
--- a/compiler-rt/lib/xray/xray_buffer_queue.cpp
+++ b/compiler-rt/lib/xray/xray_buffer_queue.cpp
@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file is a part of XRay, a dynamic runtime instruementation system.
+// This file is a part of XRay, a dynamic runtime instrumentation system.
 //
 // Defines the interface for a buffer queue implementation.
 //
diff --git a/compiler-rt/lib/xray/xray_flags.h b/compiler-rt/lib/xray/xray_flags.h
index edb5a5119f86..cce6fe9d62f9 100644
--- a/compiler-rt/lib/xray/xray_flags.h
+++ b/compiler-rt/lib/xray/xray_flags.h
@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file is a part of XRay, a dynamic runtime instruementation system.
+// This file is a part of XRay, a dynamic runtime instrumentation system.
 //
 // XRay runtime flags.
 //===----------------------------------------------------------------------===//
diff --git a/compiler-rt/lib/xray/xray_interface.cpp b/compiler-rt/lib/xray/xray_interface.cpp
index 7669b9ab82be..ddf184c9b857 100644
--- a/compiler-rt/lib/xray/xray_interface.cpp
+++ b/compiler-rt/lib/xray/xray_interface.cpp
@@ -360,7 +360,7 @@ XRayPatchingStatus mprotectAndPatchFunction(int32_t FuncId,
     return XRayPatchingStatus::FAILED;
   }
 
-  // Here we compute the minumum sled and maximum sled associated with a
+  // Here we compute the minimum sled and maximum sled associated with a
   // particular function ID.
   auto SledRange = InstrMap.SledsIndex ? InstrMap.SledsIndex[FuncId - 1]
                                        : findFunctionSleds(FuncId, InstrMap);
diff --git a/compiler-rt/lib/xray/xray_profiling.cpp b/compiler-rt/lib/xray/xray_profiling.cpp
index ef16691562cc..81c33fae88c1 100644
--- a/compiler-rt/lib/xray/xray_profiling.cpp
+++ b/compiler-rt/lib/xray/xray_profiling.cpp
@@ -402,7 +402,7 @@ profilingLoggingInit(size_t, size_t, void *Options,
       return XRayLogInitStatus::XRAY_LOG_UNINITIALIZED;
     }
 
-    // If we've succeded, set the global pointer to the initialised storage.
+    // If we've succeeded, set the global pointer to the initialised storage.
     BQ = reinterpret_cast<BufferQueue *>(&BufferQueueStorage);
   } else {
     BQ->finalize();
diff --git a/compiler-rt/test/BlocksRuntime/recursiveassign.c b/compiler-rt/test/BlocksRuntime/recursiveassign.c
index df60704e0aa4..5b1a088bd316 100644
--- a/compiler-rt/test/BlocksRuntime/recursiveassign.c
+++ b/compiler-rt/test/BlocksRuntime/recursiveassign.c
@@ -13,7 +13,7 @@
 
 // CONFIG  rdar://6639533
 
-// The compiler is prefetching x->forwarding before evaluting code that recomputes forwarding and so the value goes to a place that is never seen again.
+// The compiler is prefetching x->forwarding before evaluating code that recomputes forwarding and so the value goes to a place that is never seen again.
 
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/compiler-rt/test/asan/TestCases/Linux/malloc_delete_mismatch.cpp b/compiler-rt/test/asan/TestCases/Linux/malloc_delete_mismatch.cpp
index 50d920e43f38..94ba1238d6ac 100644
--- a/compiler-rt/test/asan/TestCases/Linux/malloc_delete_mismatch.cpp
+++ b/compiler-rt/test/asan/TestCases/Linux/malloc_delete_mismatch.cpp
@@ -1,4 +1,4 @@
-// Check that we detect malloc/delete mismatch only if the approptiate flag
+// Check that we detect malloc/delete mismatch only if the appropriate flag
 // is set.
 
 // RUN: %clangxx_asan -g %s -o %t 2>&1
diff --git a/compiler-rt/test/asan/TestCases/Windows/dll_host.cpp b/compiler-rt/test/asan/TestCases/Windows/dll_host.cpp
index 30678e3eb6eb..2a30a15589f5 100644
--- a/compiler-rt/test/asan/TestCases/Windows/dll_host.cpp
+++ b/compiler-rt/test/asan/TestCases/Windows/dll_host.cpp
@@ -17,7 +17,7 @@
 //
 // Get the list of ASan wrappers imported by the DLL RTL:
 // [BEWARE: be really careful with the sed commands, as this test can be run
-//  from different environemnts with different shells and seds]
+//  from different environments with different shells and seds]
 // RUN: grep INTERCEPT_LIBRARY_FUNCTION %p/../../../../lib/asan/asan_win_dll_thunk.cpp \
 // RUN:  | grep -v define | sed -e s/.*(/__asan_wrap_/ -e s/).*//              \
 // RUN:  > %t.imports1
diff --git a/compiler-rt/test/asan/TestCases/Windows/interface_symbols_windows.cpp b/compiler-rt/test/asan/TestCases/Windows/interface_symbols_windows.cpp
index 1738b87e80de..1fabd32c0f1d 100644
--- a/compiler-rt/test/asan/TestCases/Windows/interface_symbols_windows.cpp
+++ b/compiler-rt/test/asan/TestCases/Windows/interface_symbols_windows.cpp
@@ -13,7 +13,7 @@
 // RUN:   | sed -e s/@.*// > %t.exports
 //
 // [BEWARE: be really careful with the sed commands, as this test can be run
-//  from different environemnts with different shells and seds]
+//  from different environments with different shells and seds]
 //
 // RUN: grep -e "INTERFACE_FUNCTION"                                           \
 // RUN:  %p/../../../../lib/asan/asan_interface.inc                            \
diff --git a/compiler-rt/test/asan/TestCases/contiguous_container.cpp b/compiler-rt/test/asan/TestCases/contiguous_container.cpp
index 6ecade150fc1..27ceecfe166b 100644
--- a/compiler-rt/test/asan/TestCases/contiguous_container.cpp
+++ b/compiler-rt/test/asan/TestCases/contiguous_container.cpp
@@ -40,7 +40,7 @@ void TestContainer(size_t capacity) {
     }
   }
 
-  // Don't forget to unpoison the whole thing before destroing/reallocating.
+  // Don't forget to unpoison the whole thing before destroying/reallocating.
   __sanitizer_annotate_contiguous_container(beg, end, mid, end);
   for (size_t idx = 0; idx < capacity; idx++)
     assert(!__asan_address_is_poisoned(beg + idx));
diff --git a/compiler-rt/test/asan/TestCases/initialization-bug.cpp b/compiler-rt/test/asan/TestCases/initialization-bug.cpp
index fcf9558af8e6..b27da0e5f8c3 100644
--- a/compiler-rt/test/asan/TestCases/initialization-bug.cpp
+++ b/compiler-rt/test/asan/TestCases/initialization-bug.cpp
@@ -14,7 +14,7 @@
 // "x", "y", "z" are dynamically initialized globals.
 // Value of "x" depends on "y", value of "y" depends on "z".
 // "x" and "z" are defined in this TU, "y" is defined in another one.
-// Thus we shoud stably report initialization order fiasco independently of
+// Thus we should stably report initialization order fiasco independently of
 // the translation unit order.
 
 int initZ() {
diff --git a/compiler-rt/test/builtins/Unit/clear_cache_test.c b/compiler-rt/test/builtins/Unit/clear_cache_test.c
index 7cb0185068f2..5235ba7d9a42 100644
--- a/compiler-rt/test/builtins/Unit/clear_cache_test.c
+++ b/compiler-rt/test/builtins/Unit/clear_cache_test.c
@@ -24,7 +24,7 @@ static int func2() { return 2; }
 
 void __attribute__((noinline))
 memcpy_f(void *dst, const void *src, size_t n) {
-// ARM and MIPS nartually align functions, but use the LSB for ISA selection
+// ARM and MIPS naturally align functions, but use the LSB for ISA selection
 // (THUMB, MIPS16/uMIPS respectively).  Ensure that the ISA bit is ignored in
 // the memcpy
 #if defined(__arm__) || defined(__mips__)
diff --git a/compiler-rt/test/builtins/Unit/enable_execute_stack_test.c b/compiler-rt/test/builtins/Unit/enable_execute_stack_test.c
index 7811c2b722cd..6bfa674b47b3 100644
--- a/compiler-rt/test/builtins/Unit/enable_execute_stack_test.c
+++ b/compiler-rt/test/builtins/Unit/enable_execute_stack_test.c
@@ -16,7 +16,7 @@ static int func2() { return 2; }
 
 void *__attribute__((noinline))
 memcpy_f(void *dst, const void *src, size_t n) {
-// ARM and MIPS nartually align functions, but use the LSB for ISA selection
+// ARM and MIPS naturally align functions, but use the LSB for ISA selection
 // (THUMB, MIPS16/uMIPS respectively).  Ensure that the ISA bit is ignored in
 // the memcpy
 #if defined(__arm__) || defined(__mips__)
diff --git a/compiler-rt/test/builtins/Unit/fp_test.h b/compiler-rt/test/builtins/Unit/fp_test.h
index 7c5d5111f4e7..e54dfc108e71 100644
--- a/compiler-rt/test/builtins/Unit/fp_test.h
+++ b/compiler-rt/test/builtins/Unit/fp_test.h
@@ -138,7 +138,7 @@ static inline int compareResultD(double result,
 
 #if __LDBL_MANT_DIG__ == 113
 // return 0 if equal
-// use two 64-bit integers intead of one 128-bit integer
+// use two 64-bit integers instead of one 128-bit integer
 // because 128-bit integer constant can't be assigned directly
 static inline int compareResultLD(long double result,
                                   uint64_t expectedHi,
diff --git a/compiler-rt/test/fuzzer/CustomCrossOverTest.cpp b/compiler-rt/test/fuzzer/CustomCrossOverTest.cpp
index 36062edd4db1..f6013b93efb8 100644
--- a/compiler-rt/test/fuzzer/CustomCrossOverTest.cpp
+++ b/compiler-rt/test/fuzzer/CustomCrossOverTest.cpp
@@ -2,7 +2,7 @@
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-// Simple test for a cutom crossover.
+// Simple test for a custom crossover.
 #include <assert.h>
 #include <cstddef>
 #include <cstdint>
diff --git a/compiler-rt/test/fuzzer/CustomMutatorTest.cpp b/compiler-rt/test/fuzzer/CustomMutatorTest.cpp
index 51b6169eb8de..ba69faf943f4 100644
--- a/compiler-rt/test/fuzzer/CustomMutatorTest.cpp
+++ b/compiler-rt/test/fuzzer/CustomMutatorTest.cpp
@@ -2,7 +2,7 @@
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-// Simple test for a cutom mutator.
+// Simple test for a custom mutator.
 #include <assert.h>
 #include <cstddef>
 #include <cstdint>
diff --git a/compiler-rt/test/fuzzer/merge.test b/compiler-rt/test/fuzzer/merge.test
index ef5597a25e86..645d76142e3e 100644
--- a/compiler-rt/test/fuzzer/merge.test
+++ b/compiler-rt/test/fuzzer/merge.test
@@ -52,7 +52,7 @@ RUN: rm %t/T1/*
 RUN: cp %t/T0/* %t/T1/
 RUN: echo 'FUZZER' > %t/T2/FUZZER
 RUN: %run %t-FullCoverageSetTest -merge=1 %t/T1 %t/T2 2>&1 | FileCheck %s --check-prefix=MERGE_WITH_CRASH
-MERGE_WITH_CRASH: MERGE-OUTER: succesfull in 2 attempt(s)
+MERGE_WITH_CRASH: MERGE-OUTER: successful in 2 attempt(s)
 MERGE_WITH_CRASH: MERGE-OUTER: 3 new files
 
 # Check that we actually limit the size with max_len
@@ -61,5 +61,5 @@ RUN: echo 'FUZZER' > %t/T2/FUZZER
 RUN: %run %t-FullCoverageSetTest -merge=1 %t/T1 %t/T2  -max_len=5 2>&1 | FileCheck %s --check-prefix=MERGE_LEN5
 RUN: not grep FUZZER %t/T1/*
 RUN: grep FUZZE %t/T1/*
-MERGE_LEN5: MERGE-OUTER: succesfull in 1 attempt(s)
+MERGE_LEN5: MERGE-OUTER: successful in 1 attempt(s)
 
diff --git a/compiler-rt/test/lit.common.cfg.py b/compiler-rt/test/lit.common.cfg.py
index 9253aff2fb42..0b88a930f5b9 100644
--- a/compiler-rt/test/lit.common.cfg.py
+++ b/compiler-rt/test/lit.common.cfg.py
@@ -620,7 +620,7 @@ for postfix in ["2", "1", ""]:
   config.substitutions.append( ("%xdynamiclib_filename" + postfix, 'lib%xdynamiclib_namespec{}.so'.format(postfix)) )
   config.substitutions.append( ("%xdynamiclib_namespec", '%basename_t.dynamic') )
 
-# Provide a substituion that can be used to tell Clang to use a static libstdc++.
+# Provide a substitution that can be used to tell Clang to use a static libstdc++.
 # The substitution expands to nothing on non Linux platforms.
 # FIXME: This should check the target OS, not the host OS.
 if config.host_os == 'Linux':
diff --git a/compiler-rt/test/msan/param_tls_limit.cpp b/compiler-rt/test/msan/param_tls_limit.cpp
index 43e66858e26f..d6ff48c1bc58 100644
--- a/compiler-rt/test/msan/param_tls_limit.cpp
+++ b/compiler-rt/test/msan/param_tls_limit.cpp
@@ -27,7 +27,7 @@
 #define NO_OVERFLOW(x) assert(__msan_test_shadow(&x, sizeof(x)) == 0)
 
 #if defined(__x86_64__)
-// In x86_64, if argument is partially outside tls, it is considered completly
+// In x86_64, if argument is partially outside tls, it is considered completely
 // unpoisoned
 #define PARTIAL_OVERFLOW(x) OVERFLOW(x)
 #else
diff --git a/compiler-rt/test/sanitizer_common/CMakeLists.txt b/compiler-rt/test/sanitizer_common/CMakeLists.txt
index 925dd4ada91f..a759815c0376 100644
--- a/compiler-rt/test/sanitizer_common/CMakeLists.txt
+++ b/compiler-rt/test/sanitizer_common/CMakeLists.txt
@@ -84,7 +84,7 @@ foreach(tool ${SUPPORTED_TOOLS})
     configure_lit_site_cfg(
       ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.py.in
       ${CMAKE_CURRENT_BINARY_DIR}/${CONFIG_NAME}/lit.site.cfg.py)
-    # FIXME(dliew): LSan i386 on Darwin is completly broken right now.
+    # FIXME(dliew): LSan i386 on Darwin is completely broken right now.
     # so don't run the tests by default.
     if (NOT (CMAKE_SYSTEM_NAME MATCHES "Darwin" AND
              ${tool} STREQUAL "lsan" AND
diff --git a/compiler-rt/test/sanitizer_common/TestCases/Linux/new_delete_test.cpp b/compiler-rt/test/sanitizer_common/TestCases/Linux/new_delete_test.cpp
index 5e5346a08df4..ab6950f29663 100644
--- a/compiler-rt/test/sanitizer_common/TestCases/Linux/new_delete_test.cpp
+++ b/compiler-rt/test/sanitizer_common/TestCases/Linux/new_delete_test.cpp
@@ -6,7 +6,7 @@
 
 // Check that all new/delete variants are defined and work with supported
 // sanitizers. Sanitizer-specific failure modes tests are supposed to go to
-// the particular sanitizier's test suites.
+// the particular sanitizer's test suites.
 
 #include <cstddef>
 
diff --git a/compiler-rt/test/tsan/custom_mutex0.cpp b/compiler-rt/test/tsan/custom_mutex0.cpp
index 8302fd8841a8..da83048d9c5e 100644
--- a/compiler-rt/test/tsan/custom_mutex0.cpp
+++ b/compiler-rt/test/tsan/custom_mutex0.cpp
@@ -1,7 +1,7 @@
 // RUN: %clangxx_tsan -O1 --std=c++11 %s -o %t && %run %t 2>&1 | FileCheck %s
 #include "custom_mutex.h"
 
-// Test that custom annoations provide normal mutex synchronization
+// Test that custom annotations provide normal mutex synchronization
 // (no race reports for properly protected critical sections).
 
 Mutex mu(true, 0);
diff --git a/compiler-rt/test/tsan/deep_stack1.cpp b/compiler-rt/test/tsan/deep_stack1.cpp
index 44dd0c443920..1e973586b529 100644
--- a/compiler-rt/test/tsan/deep_stack1.cpp
+++ b/compiler-rt/test/tsan/deep_stack1.cpp
@@ -53,5 +53,5 @@ int main() {
 
 // CHECK: WARNING: ThreadSanitizer: data race
 // CHECK:    #100 foo
-// We must output suffucuently large stack (at least 100 frames)
+// We must output sufficiently large stack (at least 100 frames)
 
diff --git a/compiler-rt/test/tsan/fd_dup_norace2.cpp b/compiler-rt/test/tsan/fd_dup_norace2.cpp
index 31aaed9d356c..8ecde36201ca 100644
--- a/compiler-rt/test/tsan/fd_dup_norace2.cpp
+++ b/compiler-rt/test/tsan/fd_dup_norace2.cpp
@@ -17,7 +17,7 @@ void *Thread(void *x) {
   char buf;
   int n = read(fd, &buf, 1);
   if (n != 1) {
-    // This read can "legitimately" fail regadless of the fact that glibc claims
+    // This read can "legitimately" fail regardless of the fact that glibc claims
     // that "there is no instant in the middle of calling dup2 at which new is
     // closed and not yet a duplicate of old". Strace of the failing runs
     // looks as follows:
diff --git a/compiler-rt/utils/generate_netbsd_ioctls.awk b/compiler-rt/utils/generate_netbsd_ioctls.awk
index 0e122267b4ae..89c32ae32aa2 100755
--- a/compiler-rt/utils/generate_netbsd_ioctls.awk
+++ b/compiler-rt/utils/generate_netbsd_ioctls.awk
@@ -22,7 +22,7 @@
 #===------------------------------------------------------------------------===#
 
 BEGIN {
-  # harcode the script name
+  # hardcode the script name
   script_name = "generate_netbsd_ioctls.awk"
   outputinc = "../lib/sanitizer_common/sanitizer_interceptors_ioctl_netbsd.inc"
 
diff --git a/compiler-rt/utils/generate_netbsd_syscalls.awk b/compiler-rt/utils/generate_netbsd_syscalls.awk
index 1bddc0f2f2bf..5a3be0a7d2dc 100755
--- a/compiler-rt/utils/generate_netbsd_syscalls.awk
+++ b/compiler-rt/utils/generate_netbsd_syscalls.awk
@@ -24,7 +24,7 @@
 #===------------------------------------------------------------------------===#
 
 BEGIN {
-  # harcode the script name
+  # hardcode the script name
   script_name = "generate_netbsd_syscalls.awk"
   outputh = "../include/sanitizer/netbsd_syscall_hooks.h"
   outputinc = "../lib/sanitizer_common/sanitizer_syscalls_netbsd.inc"