[sanitizer] Remove low-hanging-fruit dead code

Summary:
Going through the dead code findings, the code removed in this CL appears to be
pretty straightforward to remove, and seems to be some leftover from previous
refactors.

Reviewers: alekseyshl, eugenis

Reviewed By: alekseyshl

Subscribers: kubamracek, delcypher, #sanitizers, llvm-commits

Differential Revision: https://reviews.llvm.org/D45704

llvm-svn: 330190

compiler-rt/lib/sanitizer_common/sanitizer_allocator_internal.h

@@ -62,15 +62,6 @@ void *InternalCalloc(uptr countr, uptr size,
 void InternalFree(void *p, InternalAllocatorCache *cache = nullptr);
 InternalAllocator *internal_allocator();
 
-enum InternalAllocEnum {
-  INTERNAL_ALLOC
-};
-
 } // namespace __sanitizer
 
-inline void *operator new(__sanitizer::operator_new_size_type size,
-                          __sanitizer::InternalAllocEnum) {
-  return __sanitizer::InternalAlloc(size);
-}
-
 #endif // SANITIZER_ALLOCATOR_INTERNAL_H

compiler-rt/lib/sanitizer_common/sanitizer_common_nolibc.cc

@@ -21,7 +21,6 @@ namespace __sanitizer {
 // bypassing libc.
 #if !SANITIZER_WINDOWS
 #if SANITIZER_LINUX
-bool ShouldLogAfterPrintf() { return false; }
 void LogMessageOnPrintf(const char *str) {}
 #endif
 void WriteToSyslog(const char *buffer) {}

compiler-rt/lib/sanitizer_common/sanitizer_flags.cc

@@ -22,14 +22,6 @@ namespace __sanitizer {
 
 CommonFlags common_flags_dont_use;
 
-struct FlagDescription {
-  const char *name;
-  const char *description;
-  FlagDescription *next;
-};
-
-IntrusiveList<FlagDescription> flag_descriptions;
-
 void CommonFlags::SetDefaults() {
 #define COMMON_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
 #include "sanitizer_flags.inc"

compiler-rt/lib/sanitizer_common/sanitizer_libc.cc

@@ -72,17 +72,6 @@ void *internal_memmove(void *dest, const void *src, uptr n) {
   return dest;
 }
 
-// Semi-fast bzero for 16-aligned data. Still far from peak performance.
-void internal_bzero_aligned16(void *s, uptr n) {
-  struct ALIGNED(16) S16 { u64 a, b; };
-  CHECK_EQ((reinterpret_cast<uptr>(s) | n) & 15, 0);
-  for (S16 *p = reinterpret_cast<S16*>(s), *end = p + n / 16; p < end; p++) {
-    p->a = p->b = 0;
-    // Make sure this does not become memset.
-    SanitizerBreakOptimization(nullptr);
-  }
-}
-
 void *internal_memset(void* s, int c, uptr n) {
   // The next line prevents Clang from making a call to memset() instead of the
   // loop below.
@@ -112,14 +101,6 @@ char* internal_strdup(const char *s) {
   return s2;
 }
 
-char* internal_strndup(const char *s, uptr n) {
-  uptr len = internal_strnlen(s, n);
-  char *s2 = (char*)InternalAlloc(len + 1);
-  internal_memcpy(s2, s, len);
-  s2[len] = 0;
-  return s2;
-}
-
 int internal_strcmp(const char *s1, const char *s2) {
   while (true) {
     unsigned c1 = *s1;
@@ -234,12 +215,6 @@ char *internal_strstr(const char *haystack, const char *needle) {
   return nullptr;
 }
 
-uptr internal_wcslen(const wchar_t *s) {
-  uptr i = 0;
-  while (s[i]) i++;
-  return i;
-}
-
 s64 internal_simple_strtoll(const char *nptr, char **endptr, int base) {
   CHECK_EQ(base, 10);
   while (IsSpace(*nptr)) nptr++;

compiler-rt/lib/sanitizer_common/sanitizer_libc.h

@@ -32,16 +32,13 @@ void *internal_memrchr(const void *s, int c, uptr n);
 int internal_memcmp(const void* s1, const void* s2, uptr n);
 void *internal_memcpy(void *dest, const void *src, uptr n);
 void *internal_memmove(void *dest, const void *src, uptr n);
-// Set [s, s + n) to 0. Both s and n should be 16-aligned.
-void internal_bzero_aligned16(void *s, uptr n);
 // Should not be used in performance-critical places.
 void *internal_memset(void *s, int c, uptr n);
 char* internal_strchr(const char *s, int c);
 char *internal_strchrnul(const char *s, int c);
 int internal_strcmp(const char *s1, const char *s2);
 uptr internal_strcspn(const char *s, const char *reject);
 char *internal_strdup(const char *s);
-char *internal_strndup(const char *s, uptr n);
 uptr internal_strlen(const char *s);
 uptr internal_strlcat(char *dst, const char *src, uptr maxlen);
 char *internal_strncat(char *dst, const char *src, uptr n);
@@ -50,8 +47,6 @@ uptr internal_strlcpy(char *dst, const char *src, uptr maxlen);
 char *internal_strncpy(char *dst, const char *src, uptr n);
 uptr internal_strnlen(const char *s, uptr maxlen);
 char *internal_strrchr(const char *s, int c);
-// This is O(N^2), but we are not using it in hot places.
-uptr internal_wcslen(const wchar_t *s);
 char *internal_strstr(const char *haystack, const char *needle);
 // Works only for base=10 and doesn't set errno.
 s64 internal_simple_strtoll(const char *nptr, char **endptr, int base);