[asan] minor cleanup

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@145966 91177308-0d34-0410-b5e6-96231b3b80d8

Author: kcc

lib/asan/asan_internal.h

@@ -91,7 +91,6 @@ extern size_t FLAG_quarantine_size;
 extern int    FLAG_demangle;
 extern bool   FLAG_symbolize;
 extern int    FLAG_v;
-extern bool   FLAG_mt;
 extern size_t FLAG_redzone;
 extern int    FLAG_debug;
 extern bool   FLAG_poison_shadow;
@@ -177,7 +176,6 @@ class LowLevelAllocator {
 
 // -------------------------- Atomic ---------------- {{{1
 static inline int AtomicInc(int *a) {
-  if (!FLAG_mt) return ++(*a);
 #ifdef ANDROID
   return __atomic_inc(a) + 1;
 #else
@@ -186,7 +184,6 @@ static inline int AtomicInc(int *a) {
 }
 
 static inline int AtomicDec(int *a) {
-  if (!FLAG_mt) return --(*a);
 #ifdef ANDROID
   return __atomic_dec(a) - 1;
 #else

lib/asan/asan_rtl.cc

@@ -57,7 +57,6 @@ static int    FLAG_atexit;
 bool   FLAG_fast_unwind = true;
 
 size_t FLAG_redzone;  // power of two, >= 32
-bool   FLAG_mt;  // set to 0 if you have only one thread.
 size_t FLAG_quarantine_size;
 int    FLAG_demangle;
 bool   FLAG_symbolize;
@@ -665,7 +664,6 @@ void __asan_init() {
   FLAG_debug = IntFlagValue(options, "debug=", 0);
   FLAG_replace_cfallocator = IntFlagValue(options, "replace_cfallocator=", 1);
   FLAG_fast_unwind = IntFlagValue(options, "fast_unwind=", 1);
-  FLAG_mt = IntFlagValue(options, "mt=", 1);
   FLAG_replace_str = IntFlagValue(options, "replace_str=", 1);
   FLAG_replace_intrin = IntFlagValue(options, "replace_intrin=", 0);
   FLAG_use_fake_stack = IntFlagValue(options, "use_fake_stack=", 1);