diff --git a/lib/asan/lit_tests/TestCases/Linux/heavy_uar_test.cc b/lib/asan/lit_tests/TestCases/Linux/heavy_uar_test.cc
index 2c1b707..4c5744a 100644
--- a/lib/asan/lit_tests/TestCases/Linux/heavy_uar_test.cc
+++ b/lib/asan/lit_tests/TestCases/Linux/heavy_uar_test.cc
@@ -1,7 +1,7 @@
 // RUN: %clangxx_asan -fsanitize=use-after-return -O0 %s -o %t && \
-// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN:   %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -fsanitize=use-after-return -O2 %s -o %t && \
-// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN:   %t 2>&1 | FileCheck %s
 
 #include <stdio.h>
 #include <string.h>
diff --git a/lib/asan/lit_tests/TestCases/Linux/initialization-bug-any-order.cc b/lib/asan/lit_tests/TestCases/Linux/initialization-bug-any-order.cc
index c33f5cc..0f1ea3e 100644
--- a/lib/asan/lit_tests/TestCases/Linux/initialization-bug-any-order.cc
+++ b/lib/asan/lit_tests/TestCases/Linux/initialization-bug-any-order.cc
@@ -5,10 +5,10 @@
 
 // RUN: %clangxx_asan -O0 %s %p/../Helpers/initialization-bug-extra.cc -o %t
 // RUN: ASAN_OPTIONS=check_initialization_order=true:strict_init_order=true %t 2>&1 \
-// RUN:    | %symbolize | FileCheck %s
+// RUN:    | FileCheck %s
 // RUN: %clangxx_asan -O0 %p/../Helpers/initialization-bug-extra.cc %s -o %t
 // RUN: ASAN_OPTIONS=check_initialization_order=true:strict_init_order=true %t 2>&1 \
-// RUN:    | %symbolize | FileCheck %s
+// RUN:    | FileCheck %s
 
 // Do not test with optimization -- the error may be optimized away.
 
diff --git a/lib/asan/lit_tests/TestCases/Linux/malloc-in-qsort.cc b/lib/asan/lit_tests/TestCases/Linux/malloc-in-qsort.cc
index 32c2ca7..c2ba82e 100644
--- a/lib/asan/lit_tests/TestCases/Linux/malloc-in-qsort.cc
+++ b/lib/asan/lit_tests/TestCases/Linux/malloc-in-qsort.cc
@@ -1,6 +1,6 @@
 // RUN: %clangxx_asan -O2 %s -o %t
-// RUN: ASAN_OPTIONS=fast_unwind_on_malloc=1 %t 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK-FAST
-// RUN: ASAN_OPTIONS=fast_unwind_on_malloc=0 %t 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK-SLOW
+// RUN: ASAN_OPTIONS=fast_unwind_on_malloc=1 %t 2>&1 | FileCheck %s --check-prefix=CHECK-FAST
+// RUN: ASAN_OPTIONS=fast_unwind_on_malloc=0 %t 2>&1 | FileCheck %s --check-prefix=CHECK-SLOW
 
 // Test how well we unwind in presence of qsort in the stack
 // (i.e. if we can unwind through a function compiled w/o frame pointers).
diff --git a/lib/asan/lit_tests/TestCases/Linux/malloc_delete_mismatch.cc b/lib/asan/lit_tests/TestCases/Linux/malloc_delete_mismatch.cc
index f34b33a..984ac8f 100644
--- a/lib/asan/lit_tests/TestCases/Linux/malloc_delete_mismatch.cc
+++ b/lib/asan/lit_tests/TestCases/Linux/malloc_delete_mismatch.cc
@@ -2,8 +2,7 @@
 // is set.
 
 // RUN: %clangxx_asan -g %s -o %t 2>&1
-// RUN: ASAN_OPTIONS=alloc_dealloc_mismatch=1 %t 2>&1 | \
-// RUN: %symbolize | FileCheck %s
+// RUN: ASAN_OPTIONS=alloc_dealloc_mismatch=1 %t 2>&1 | FileCheck %s
 
 // No error here.
 // RUN: ASAN_OPTIONS=alloc_dealloc_mismatch=0 %t
diff --git a/lib/asan/lit_tests/TestCases/Linux/overflow-in-qsort.cc b/lib/asan/lit_tests/TestCases/Linux/overflow-in-qsort.cc
index 19e73f6..f4f2ca0 100644
--- a/lib/asan/lit_tests/TestCases/Linux/overflow-in-qsort.cc
+++ b/lib/asan/lit_tests/TestCases/Linux/overflow-in-qsort.cc
@@ -1,6 +1,6 @@
 // RUN: %clangxx_asan -O2 %s -o %t
-// RUN: ASAN_OPTIONS=fast_unwind_on_fatal=1 %t 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK-FAST
-// RUN: ASAN_OPTIONS=fast_unwind_on_fatal=0 %t 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK-SLOW
+// RUN: ASAN_OPTIONS=fast_unwind_on_fatal=1 %t 2>&1 | FileCheck %s --check-prefix=CHECK-FAST
+// RUN: ASAN_OPTIONS=fast_unwind_on_fatal=0 %t 2>&1 | FileCheck %s --check-prefix=CHECK-SLOW
 
 // Test how well we unwind in presence of qsort in the stack
 // (i.e. if we can unwind through a function compiled w/o frame pointers).
diff --git a/lib/asan/lit_tests/TestCases/Linux/ptrace.cc b/lib/asan/lit_tests/TestCases/Linux/ptrace.cc
index 8356eac..c6195f6 100644
--- a/lib/asan/lit_tests/TestCases/Linux/ptrace.cc
+++ b/lib/asan/lit_tests/TestCases/Linux/ptrace.cc
@@ -1,5 +1,5 @@
 // RUN: %clangxx_asan -O0 %s -o %t && %t
-// RUN: %clangxx_asan -DPOSITIVE -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -DPOSITIVE -O0 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <assert.h>
 #include <stdio.h>
diff --git a/lib/asan/lit_tests/TestCases/Linux/syscalls.cc b/lib/asan/lit_tests/TestCases/Linux/syscalls.cc
index e7acdba..7352914 100644
--- a/lib/asan/lit_tests/TestCases/Linux/syscalls.cc
+++ b/lib/asan/lit_tests/TestCases/Linux/syscalls.cc
@@ -1,5 +1,5 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <assert.h>
 #include <errno.h>
diff --git a/lib/asan/lit_tests/TestCases/Linux/time_null_regtest.cc b/lib/asan/lit_tests/TestCases/Linux/time_null_regtest.cc
index 7579a44..566409b 100644
--- a/lib/asan/lit_tests/TestCases/Linux/time_null_regtest.cc
+++ b/lib/asan/lit_tests/TestCases/Linux/time_null_regtest.cc
@@ -1,4 +1,4 @@
-// RUN: %clangxx_asan -O0 %s -fsanitize-address-zero-base-shadow -pie -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -fsanitize-address-zero-base-shadow -pie -o %t && %t 2>&1 | FileCheck %s
 
 // Zero-base shadow only works on x86_64 and i386.
 // REQUIRES: x86_64-supported-target
diff --git a/lib/asan/lit_tests/TestCases/Linux/zero-base-shadow32.cc b/lib/asan/lit_tests/TestCases/Linux/zero-base-shadow32.cc
index 5406b8a..5ef087b 100644
--- a/lib/asan/lit_tests/TestCases/Linux/zero-base-shadow32.cc
+++ b/lib/asan/lit_tests/TestCases/Linux/zero-base-shadow32.cc
@@ -1,9 +1,9 @@
 // RUN: %clangxx_asan -O0 -fsanitize-address-zero-base-shadow -fPIE -pie %s -o %t
-// RUN: %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O1 -fsanitize-address-zero-base-shadow -fPIE -pie %s -o %t
-// RUN: %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O2 -fsanitize-address-zero-base-shadow -fPIE -pie %s -o %t
-// RUN: %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %t 2>&1 | FileCheck %s
 
 // Zero-base shadow only works on x86_64 and i386.
 // REQUIRES: i386-supported-target, asan-32-bits
diff --git a/lib/asan/lit_tests/TestCases/Linux/zero-base-shadow64.cc b/lib/asan/lit_tests/TestCases/Linux/zero-base-shadow64.cc
index c02c923..a726b44 100644
--- a/lib/asan/lit_tests/TestCases/Linux/zero-base-shadow64.cc
+++ b/lib/asan/lit_tests/TestCases/Linux/zero-base-shadow64.cc
@@ -1,9 +1,9 @@
 // RUN: %clangxx_asan -O0 -fsanitize-address-zero-base-shadow -fPIE -pie %s -o %t
-// RUN: %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O1 -fsanitize-address-zero-base-shadow -fPIE -pie %s -o %t
-// RUN: %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O2 -fsanitize-address-zero-base-shadow -fPIE -pie %s -o %t
-// RUN: %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %t 2>&1 | FileCheck %s
 
 // Zero-base shadow only works on x86_64 and i386.
 // REQUIRES: x86_64-supported-target, asan-64-bits
diff --git a/lib/asan/lit_tests/TestCases/deep_stack_uaf.cc b/lib/asan/lit_tests/TestCases/deep_stack_uaf.cc
index 536cddb..6ab515e 100644
--- a/lib/asan/lit_tests/TestCases/deep_stack_uaf.cc
+++ b/lib/asan/lit_tests/TestCases/deep_stack_uaf.cc
@@ -1,7 +1,7 @@
 // Check that we can store lots of stack frames if asked to.
 
 // RUN: %clangxx_asan -O0 %s -o %t 2>&1
-// RUN: ASAN_OPTIONS=malloc_context_size=120:redzone=512 %t 2>&1 | %symbolize | FileCheck %s
+// RUN: ASAN_OPTIONS=malloc_context_size=120:redzone=512 %t 2>&1 | FileCheck %s
 #include <stdlib.h>
 #include <stdio.h>
 
diff --git a/lib/asan/lit_tests/TestCases/deep_tail_call.cc b/lib/asan/lit_tests/TestCases/deep_tail_call.cc
index 87d8886..8a1b3e8 100644
--- a/lib/asan/lit_tests/TestCases/deep_tail_call.cc
+++ b/lib/asan/lit_tests/TestCases/deep_tail_call.cc
@@ -1,7 +1,7 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
 // CHECK: AddressSanitizer: global-buffer-overflow
 int global[10];
diff --git a/lib/asan/lit_tests/TestCases/deep_thread_stack.cc b/lib/asan/lit_tests/TestCases/deep_thread_stack.cc
index ecc6fff..10954f2 100644
--- a/lib/asan/lit_tests/TestCases/deep_thread_stack.cc
+++ b/lib/asan/lit_tests/TestCases/deep_thread_stack.cc
@@ -1,7 +1,7 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <pthread.h>
 
diff --git a/lib/asan/lit_tests/TestCases/double-free.cc b/lib/asan/lit_tests/TestCases/double-free.cc
index 6e6f4bb..a3d307d 100644
--- a/lib/asan/lit_tests/TestCases/double-free.cc
+++ b/lib/asan/lit_tests/TestCases/double-free.cc
@@ -1,4 +1,4 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <stdlib.h>
 #include <string.h>
diff --git a/lib/asan/lit_tests/TestCases/global-demangle.cc b/lib/asan/lit_tests/TestCases/global-demangle.cc
index 75001ae..bad37da 100644
--- a/lib/asan/lit_tests/TestCases/global-demangle.cc
+++ b/lib/asan/lit_tests/TestCases/global-demangle.cc
@@ -1,4 +1,3 @@
-// Don't run through %symbolize to avoid c++filt demangling.
 // RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
 
 namespace XXX {
diff --git a/lib/asan/lit_tests/TestCases/global-overflow.cc b/lib/asan/lit_tests/TestCases/global-overflow.cc
index e572335..5b75efa 100644
--- a/lib/asan/lit_tests/TestCases/global-overflow.cc
+++ b/lib/asan/lit_tests/TestCases/global-overflow.cc
@@ -1,7 +1,7 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <string.h>
 int main(int argc, char **argv) {
diff --git a/lib/asan/lit_tests/TestCases/heap-overflow.cc b/lib/asan/lit_tests/TestCases/heap-overflow.cc
index 664b264..05aad02 100644
--- a/lib/asan/lit_tests/TestCases/heap-overflow.cc
+++ b/lib/asan/lit_tests/TestCases/heap-overflow.cc
@@ -1,10 +1,10 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O0 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O1 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O2 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O3 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
 
 #include <stdlib.h>
diff --git a/lib/asan/lit_tests/TestCases/initialization-bug.cc b/lib/asan/lit_tests/TestCases/initialization-bug.cc
index 91fe7db..3a05cc2 100644
--- a/lib/asan/lit_tests/TestCases/initialization-bug.cc
+++ b/lib/asan/lit_tests/TestCases/initialization-bug.cc
@@ -1,7 +1,7 @@
 // Test to make sure basic initialization order errors are caught.
 
 // RUN: %clangxx_asan -O0 %s %p/Helpers/initialization-bug-extra2.cc -o %t
-// RUN: ASAN_OPTIONS=check_initialization_order=true %t 2>&1 | %symbolize | FileCheck %s
+// RUN: ASAN_OPTIONS=check_initialization_order=true %t 2>&1 | FileCheck %s
 
 // Do not test with optimization -- the error may be optimized away.
 
diff --git a/lib/asan/lit_tests/TestCases/invalid-free.cc b/lib/asan/lit_tests/TestCases/invalid-free.cc
index c174413..8e1c086 100644
--- a/lib/asan/lit_tests/TestCases/invalid-free.cc
+++ b/lib/asan/lit_tests/TestCases/invalid-free.cc
@@ -1,4 +1,4 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <stdlib.h>
 #include <string.h>
diff --git a/lib/asan/lit_tests/TestCases/ioctl.cc b/lib/asan/lit_tests/TestCases/ioctl.cc
index 0939d6c..46f344f 100644
--- a/lib/asan/lit_tests/TestCases/ioctl.cc
+++ b/lib/asan/lit_tests/TestCases/ioctl.cc
@@ -1,5 +1,5 @@
-// RUN: %clangxx_asan -O0 -g %s -o %t && ASAN_OPTIONS=handle_ioctl=1 %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O3 -g %s -o %t && ASAN_OPTIONS=handle_ioctl=1 %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 -g %s -o %t && ASAN_OPTIONS=handle_ioctl=1 %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 -g %s -o %t && ASAN_OPTIONS=handle_ioctl=1 %t 2>&1 | FileCheck %s
 
 // RUN: %clangxx_asan -O0 -g %s -o %t && %t
 // RUN: %clangxx_asan -O3 -g %s -o %t && %t
diff --git a/lib/asan/lit_tests/TestCases/large_func_test.cc b/lib/asan/lit_tests/TestCases/large_func_test.cc
index d550a96..201f5d5 100644
--- a/lib/asan/lit_tests/TestCases/large_func_test.cc
+++ b/lib/asan/lit_tests/TestCases/large_func_test.cc
@@ -1,10 +1,10 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O0 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O1 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O2 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O3 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
 
 #include <stdlib.h>
diff --git a/lib/asan/lit_tests/TestCases/memcmp_strict_test.cc b/lib/asan/lit_tests/TestCases/memcmp_strict_test.cc
index 881410e..a29282b 100644
--- a/lib/asan/lit_tests/TestCases/memcmp_strict_test.cc
+++ b/lib/asan/lit_tests/TestCases/memcmp_strict_test.cc
@@ -1,7 +1,7 @@
-// RUN: %clangxx_asan -O0 %s -o %t && ASAN_OPTIONS=strict_memcmp=0 %t 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK-nonstrict
-// RUN: %clangxx_asan -O0 %s -o %t && ASAN_OPTIONS=strict_memcmp=1 %t 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK-strict
+// RUN: %clangxx_asan -O0 %s -o %t && ASAN_OPTIONS=strict_memcmp=0 %t 2>&1 | FileCheck %s --check-prefix=CHECK-nonstrict
+// RUN: %clangxx_asan -O0 %s -o %t && ASAN_OPTIONS=strict_memcmp=1 %t 2>&1 | FileCheck %s --check-prefix=CHECK-strict
 // Default to strict_memcmp=1.
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK-strict
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s --check-prefix=CHECK-strict
 
 #include <stdio.h>
 #include <string.h>
diff --git a/lib/asan/lit_tests/TestCases/memcmp_test.cc b/lib/asan/lit_tests/TestCases/memcmp_test.cc
index 78c151f..2d7d4f4 100644
--- a/lib/asan/lit_tests/TestCases/memcmp_test.cc
+++ b/lib/asan/lit_tests/TestCases/memcmp_test.cc
@@ -1,7 +1,7 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <string.h>
 int main(int argc, char **argv) {
diff --git a/lib/asan/lit_tests/TestCases/null_deref.cc b/lib/asan/lit_tests/TestCases/null_deref.cc
index a5374f5..4d501c6 100644
--- a/lib/asan/lit_tests/TestCases/null_deref.cc
+++ b/lib/asan/lit_tests/TestCases/null_deref.cc
@@ -1,10 +1,10 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O0 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O1 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O2 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O3 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
 
 __attribute__((noinline))
diff --git a/lib/asan/lit_tests/TestCases/partial_right.cc b/lib/asan/lit_tests/TestCases/partial_right.cc
index 43c1453..0beece3 100644
--- a/lib/asan/lit_tests/TestCases/partial_right.cc
+++ b/lib/asan/lit_tests/TestCases/partial_right.cc
@@ -1,7 +1,7 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <stdlib.h>
 int main(int argc, char **argv) {
diff --git a/lib/asan/lit_tests/TestCases/readv.cc b/lib/asan/lit_tests/TestCases/readv.cc
index 5120b77..920ebc8 100644
--- a/lib/asan/lit_tests/TestCases/readv.cc
+++ b/lib/asan/lit_tests/TestCases/readv.cc
@@ -1,5 +1,5 @@
 // RUN: %clangxx_asan -O0 %s -o %t && %t
-// RUN: %clangxx_asan -O0 %s -DPOSITIVE -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -DPOSITIVE -o %t && %t 2>&1 | FileCheck %s
 
 // Test the readv() interceptor.
 
diff --git a/lib/asan/lit_tests/TestCases/sanity_check_pure_c.c b/lib/asan/lit_tests/TestCases/sanity_check_pure_c.c
index ac4f034..3eb9931 100644
--- a/lib/asan/lit_tests/TestCases/sanity_check_pure_c.c
+++ b/lib/asan/lit_tests/TestCases/sanity_check_pure_c.c
@@ -1,10 +1,10 @@
 // Sanity checking a test in pure C.
 // RUN: %clang_asan -O2 %s -o %t
-// RUN: %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %t 2>&1 | FileCheck %s
 
 // Sanity checking a test in pure C with -pie.
 // RUN: %clang_asan -O2 %s -pie -o %t
-// RUN: %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %t 2>&1 | FileCheck %s
 
 #include <stdlib.h>
 int main() {
diff --git a/lib/asan/lit_tests/TestCases/shared-lib-test.cc b/lib/asan/lit_tests/TestCases/shared-lib-test.cc
index 205143d..c8fd0a8 100644
--- a/lib/asan/lit_tests/TestCases/shared-lib-test.cc
+++ b/lib/asan/lit_tests/TestCases/shared-lib-test.cc
@@ -1,15 +1,15 @@
 // RUN: %clangxx_asan -O0 %p/SharedLibs/shared-lib-test-so.cc \
 // RUN:     -fPIC -shared -o %t-so.so
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O1 %p/SharedLibs/shared-lib-test-so.cc \
 // RUN:     -fPIC -shared -o %t-so.so
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O2 %p/SharedLibs/shared-lib-test-so.cc \
 // RUN:     -fPIC -shared -o %t-so.so
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -O3 %p/SharedLibs/shared-lib-test-so.cc \
 // RUN:     -fPIC -shared -o %t-so.so
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <dlfcn.h>
 #include <stdio.h>
diff --git a/lib/asan/lit_tests/TestCases/stack-frame-demangle.cc b/lib/asan/lit_tests/TestCases/stack-frame-demangle.cc
index a4afe5d..68f3872 100644
--- a/lib/asan/lit_tests/TestCases/stack-frame-demangle.cc
+++ b/lib/asan/lit_tests/TestCases/stack-frame-demangle.cc
@@ -1,4 +1,4 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <string.h>
 
diff --git a/lib/asan/lit_tests/TestCases/stack-oob-frames.cc b/lib/asan/lit_tests/TestCases/stack-oob-frames.cc
index a4acd59..dc2615c 100644
--- a/lib/asan/lit_tests/TestCases/stack-oob-frames.cc
+++ b/lib/asan/lit_tests/TestCases/stack-oob-frames.cc
@@ -1,8 +1,8 @@
 // RUN: %clangxx_asan -O1 %s -o %t
-// RUN: %t 0 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK0
-// RUN: %t 1 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK1
-// RUN: %t 2 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK2
-// RUN: %t 3 2>&1 | %symbolize | FileCheck %s --check-prefix=CHECK3
+// RUN: %t 0 2>&1 | FileCheck %s --check-prefix=CHECK0
+// RUN: %t 1 2>&1 | FileCheck %s --check-prefix=CHECK1
+// RUN: %t 2 2>&1 | FileCheck %s --check-prefix=CHECK2
+// RUN: %t 3 2>&1 | FileCheck %s --check-prefix=CHECK3
 
 #define NOINLINE __attribute__((noinline))
 inline void break_optimization(void *arg) {
diff --git a/lib/asan/lit_tests/TestCases/stack-overflow.cc b/lib/asan/lit_tests/TestCases/stack-overflow.cc
index 3719482..f91b391 100644
--- a/lib/asan/lit_tests/TestCases/stack-overflow.cc
+++ b/lib/asan/lit_tests/TestCases/stack-overflow.cc
@@ -1,7 +1,7 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <string.h>
 int main(int argc, char **argv) {
diff --git a/lib/asan/lit_tests/TestCases/stack-use-after-return.cc b/lib/asan/lit_tests/TestCases/stack-use-after-return.cc
index 11bdfdf..8064ffd 100644
--- a/lib/asan/lit_tests/TestCases/stack-use-after-return.cc
+++ b/lib/asan/lit_tests/TestCases/stack-use-after-return.cc
@@ -1,12 +1,12 @@
 // XFAIL: *
 // RUN: %clangxx_asan -fsanitize=use-after-return -O0 %s -o %t && \
-// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN:   %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -fsanitize=use-after-return -O1 %s -o %t && \
-// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN:   %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -fsanitize=use-after-return -O2 %s -o %t && \
-// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN:   %t 2>&1 | FileCheck %s
 // RUN: %clangxx_asan -fsanitize=use-after-return -O3 %s -o %t && \
-// RUN:   %t 2>&1 | %symbolize | FileCheck %s
+// RUN:   %t 2>&1 | FileCheck %s
 
 #include <stdio.h>
 
diff --git a/lib/asan/lit_tests/TestCases/strdup_oob_test.cc b/lib/asan/lit_tests/TestCases/strdup_oob_test.cc
index f8366dd..bdaef4f 100644
--- a/lib/asan/lit_tests/TestCases/strdup_oob_test.cc
+++ b/lib/asan/lit_tests/TestCases/strdup_oob_test.cc
@@ -1,7 +1,7 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
 #include <string.h>
 
diff --git a/lib/asan/lit_tests/TestCases/strncpy-overflow.cc b/lib/asan/lit_tests/TestCases/strncpy-overflow.cc
index 91dbec4..54eabe1 100644
--- a/lib/asan/lit_tests/TestCases/strncpy-overflow.cc
+++ b/lib/asan/lit_tests/TestCases/strncpy-overflow.cc
@@ -1,10 +1,10 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O0 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O1 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O2 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O3 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
 
 #include <string.h>
diff --git a/lib/asan/lit_tests/TestCases/time_interceptor.cc b/lib/asan/lit_tests/TestCases/time_interceptor.cc
index a0de68b..e270af9 100644
--- a/lib/asan/lit_tests/TestCases/time_interceptor.cc
+++ b/lib/asan/lit_tests/TestCases/time_interceptor.cc
@@ -1,4 +1,4 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
 
 // Test the time() interceptor.
 
diff --git a/lib/asan/lit_tests/TestCases/unaligned_loads_and_stores.cc b/lib/asan/lit_tests/TestCases/unaligned_loads_and_stores.cc
index cf58e90..c46d42e 100644
--- a/lib/asan/lit_tests/TestCases/unaligned_loads_and_stores.cc
+++ b/lib/asan/lit_tests/TestCases/unaligned_loads_and_stores.cc
@@ -1,15 +1,15 @@
 // RUN: %clangxx_asan -O0 %s -o %t
-// RUN: %t A 2>&1 | %symbolize | FileCheck --check-prefix=CHECK-A %s
-// RUN: %t B 2>&1 | %symbolize | FileCheck --check-prefix=CHECK-B %s
-// RUN: %t C 2>&1 | %symbolize | FileCheck --check-prefix=CHECK-C %s
-// RUN: %t D 2>&1 | %symbolize | FileCheck --check-prefix=CHECK-D %s
-// RUN: %t E 2>&1 | %symbolize | FileCheck --check-prefix=CHECK-E %s
+// RUN: %t A 2>&1 | FileCheck --check-prefix=CHECK-A %s
+// RUN: %t B 2>&1 | FileCheck --check-prefix=CHECK-B %s
+// RUN: %t C 2>&1 | FileCheck --check-prefix=CHECK-C %s
+// RUN: %t D 2>&1 | FileCheck --check-prefix=CHECK-D %s
+// RUN: %t E 2>&1 | FileCheck --check-prefix=CHECK-E %s
 
-// RUN: %t K 2>&1 | %symbolize | FileCheck --check-prefix=CHECK-K %s
-// RUN: %t L 2>&1 | %symbolize | FileCheck --check-prefix=CHECK-L %s
-// RUN: %t M 2>&1 | %symbolize | FileCheck --check-prefix=CHECK-M %s
-// RUN: %t N 2>&1 | %symbolize | FileCheck --check-prefix=CHECK-N %s
-// RUN: %t O 2>&1 | %symbolize | FileCheck --check-prefix=CHECK-O %s
+// RUN: %t K 2>&1 | FileCheck --check-prefix=CHECK-K %s
+// RUN: %t L 2>&1 | FileCheck --check-prefix=CHECK-L %s
+// RUN: %t M 2>&1 | FileCheck --check-prefix=CHECK-M %s
+// RUN: %t N 2>&1 | FileCheck --check-prefix=CHECK-N %s
+// RUN: %t O 2>&1 | FileCheck --check-prefix=CHECK-O %s
 
 #include <sanitizer/asan_interface.h>
 
diff --git a/lib/asan/lit_tests/TestCases/use-after-free-right.cc b/lib/asan/lit_tests/TestCases/use-after-free-right.cc
index 58c5e08..37132a6 100644
--- a/lib/asan/lit_tests/TestCases/use-after-free-right.cc
+++ b/lib/asan/lit_tests/TestCases/use-after-free-right.cc
@@ -1,10 +1,10 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O0 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O1 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O2 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O3 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
 
 // Test use-after-free report in the case when access is at the right border of
diff --git a/lib/asan/lit_tests/TestCases/use-after-free.cc b/lib/asan/lit_tests/TestCases/use-after-free.cc
index 54af66d..5322cb6 100644
--- a/lib/asan/lit_tests/TestCases/use-after-free.cc
+++ b/lib/asan/lit_tests/TestCases/use-after-free.cc
@@ -1,10 +1,10 @@
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O0 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O1 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O1 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O2 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O2 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
-// RUN: %clangxx_asan -O3 %s -o %t && %t 2>&1 | %symbolize > %t.out
+// RUN: %clangxx_asan -O3 %s -o %t && not %t 2>%t.out
 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-%os < %t.out
 
 #include <stdlib.h>
diff --git a/lib/asan/lit_tests/TestCases/use-after-poison.cc b/lib/asan/lit_tests/TestCases/use-after-poison.cc
index 03a2417..33c1ab5 100644
--- a/lib/asan/lit_tests/TestCases/use-after-poison.cc
+++ b/lib/asan/lit_tests/TestCases/use-after-poison.cc
@@ -1,5 +1,5 @@
 // Check that __asan_poison_memory_region works.
-// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O0 %s -o %t && %t 2>&1 | FileCheck %s
 //
 // Check that we can disable it
 // RUN: ASAN_OPTIONS=allow_user_poisoning=0 %t
diff --git a/lib/asan/lit_tests/TestCases/use-after-scope-dtor-order.cc b/lib/asan/lit_tests/TestCases/use-after-scope-dtor-order.cc
index 8c5bd3a..11179e6 100644
--- a/lib/asan/lit_tests/TestCases/use-after-scope-dtor-order.cc
+++ b/lib/asan/lit_tests/TestCases/use-after-scope-dtor-order.cc
@@ -1,5 +1,5 @@
 // RUN: %clangxx_asan -O0 -fsanitize=use-after-scope %s -o %t && \
-// RUN:     %t 2>&1 | %symbolize | FileCheck %s
+// RUN:     %t 2>&1 | FileCheck %s
 #include <stdio.h>
 
 struct IntHolder {
diff --git a/lib/asan/lit_tests/TestCases/use-after-scope-inlined.cc b/lib/asan/lit_tests/TestCases/use-after-scope-inlined.cc
index 37f92e5..100c262 100644
--- a/lib/asan/lit_tests/TestCases/use-after-scope-inlined.cc
+++ b/lib/asan/lit_tests/TestCases/use-after-scope-inlined.cc
@@ -2,7 +2,7 @@
 // happens. "always_inline" is not enough, as Clang doesn't emit
 // llvm.lifetime intrinsics at -O0.
 //
-// RUN: %clangxx_asan -O2 -fsanitize=use-after-scope %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -O2 -fsanitize=use-after-scope %s -o %t && %t 2>&1 | FileCheck %s
 
 int *arr;
 
diff --git a/lib/asan/lit_tests/TestCases/use-after-scope-temp.cc b/lib/asan/lit_tests/TestCases/use-after-scope-temp.cc
index 4b1d6f0..1bb309b 100644
--- a/lib/asan/lit_tests/TestCases/use-after-scope-temp.cc
+++ b/lib/asan/lit_tests/TestCases/use-after-scope-temp.cc
@@ -1,5 +1,5 @@
 // RUN: %clangxx_asan -O0 -fsanitize=use-after-scope %s -o %t && \
-// RUN:     %t 2>&1 | %symbolize | FileCheck %s
+// RUN:     %t 2>&1 | FileCheck %s
 //
 // Lifetime for temporaries is not emitted yet.
 // XFAIL: *
diff --git a/lib/asan/lit_tests/TestCases/use-after-scope.cc b/lib/asan/lit_tests/TestCases/use-after-scope.cc
index 5a74fda..f45c262 100644
--- a/lib/asan/lit_tests/TestCases/use-after-scope.cc
+++ b/lib/asan/lit_tests/TestCases/use-after-scope.cc
@@ -1,5 +1,5 @@
 // RUN: %clangxx_asan -O0 -fsanitize=use-after-scope %s -o %t && \
-// RUN:     %t 2>&1 | %symbolize | FileCheck %s
+// RUN:     %t 2>&1 | FileCheck %s
 
 int main() {
   int *p = 0;
diff --git a/lib/asan/lit_tests/TestCases/wait.cc b/lib/asan/lit_tests/TestCases/wait.cc
index 154df56..ff87a2d 100644
--- a/lib/asan/lit_tests/TestCases/wait.cc
+++ b/lib/asan/lit_tests/TestCases/wait.cc
@@ -1,23 +1,23 @@
-// RUN: %clangxx_asan -DWAIT -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -DWAIT -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -DWAIT -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -DWAIT -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
-// RUN: %clangxx_asan -DWAITPID -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -DWAITPID -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -DWAITPID -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -DWAITPID -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
-// RUN: %clangxx_asan -DWAITID -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -DWAITID -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -DWAITID -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -DWAITID -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
-// RUN: %clangxx_asan -DWAIT3 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -DWAIT3 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -DWAIT3 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -DWAIT3 -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
-// RUN: %clangxx_asan -DWAIT4 -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -DWAIT4 -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -DWAIT4 -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -DWAIT4 -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
-// RUN: %clangxx_asan -DWAIT3_RUSAGE -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -DWAIT3_RUSAGE -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -DWAIT3_RUSAGE -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -DWAIT3_RUSAGE -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
-// RUN: %clangxx_asan -DWAIT4_RUSAGE -O0 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
-// RUN: %clangxx_asan -DWAIT4_RUSAGE -O3 %s -o %t && %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -DWAIT4_RUSAGE -O0 %s -o %t && %t 2>&1 | FileCheck %s
+// RUN: %clangxx_asan -DWAIT4_RUSAGE -O3 %s -o %t && %t 2>&1 | FileCheck %s
 
 
 #include <assert.h>
diff --git a/lib/asan/lit_tests/lit.cfg b/lib/asan/lit_tests/lit.cfg
index 1e6725e..c215651 100644
--- a/lib/asan/lit_tests/lit.cfg
+++ b/lib/asan/lit_tests/lit.cfg
@@ -72,10 +72,6 @@
   config.environment['ASAN_SYMBOLIZER_PATH'] = os.path.join(
        llvm_tools_dir, "llvm-symbolizer")
 
-# Define %symbolize substitution that filters output through
-# c++filt (for demangling, somewhy it doesn't work for symbolizer on Mac).
-config.substitutions.append( ("%symbolize ", " c++filt "))
-
 # Define CHECK-%os to check for OS-dependent output.
 config.substitutions.append( ('CHECK-%os', ("CHECK-" + config.host_os)))