Revert "[tsan] Replace mem intrinsics with calls to interceptors"

Breaks
http://45.33.8.238/macm1/43944/step_4.txt
https://lab.llvm.org/buildbot/#/builders/70/builds/26926

This reverts commit 77654a6.

Author: vitalybuka

compiler-rt/lib/tsan/rtl/tsan.syms.extra

@@ -9,9 +9,6 @@ __tsan_java*
 __tsan_unaligned*
 __tsan_release
 __tsan_acquire
-__tsan_memcpy
-__tsan_memmove
-__tsan_memset
 __tsan_mutex_create
 __tsan_mutex_destroy
 __tsan_mutex_pre_lock

compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp

@@ -3059,17 +3059,3 @@ extern "C" SANITIZER_INTERFACE_ATTRIBUTE void __tsan_testonly_barrier_wait(
     FutexWait(barrier, cur);
   }
 }
-
-extern "C" {
-__attribute__((alias(SANITIZER_STRINGIFY(WRAP(memcpy))),
-               visibility("default"))) void *
-__tsan_memcpy(void *dst, const void *src, uptr size);
-
-__attribute__((alias(SANITIZER_STRINGIFY(WRAP(memset))),
-               visibility("default"))) void *
-__tsan_memset(void *dst, int c, uptr size);
-
-__attribute__((alias(SANITIZER_STRINGIFY(WRAP(memmove))),
-               visibility("default"))) void *
-__tsan_memmove(void *dst, const void *src, uptr size);
-}

compiler-rt/lib/tsan/rtl/tsan_interface.h

@@ -72,13 +72,6 @@ SANITIZER_INTERFACE_ATTRIBUTE void __tsan_vptr_read(void **vptr_p);
 SANITIZER_INTERFACE_ATTRIBUTE
 void __tsan_vptr_update(void **vptr_p, void *new_val);
 
-SANITIZER_INTERFACE_ATTRIBUTE
-void *__tsan_memcpy(void *dest, const void *src, uptr count);
-SANITIZER_INTERFACE_ATTRIBUTE
-void *__tsan_memset(void *dest, int ch, uptr count);
-SANITIZER_INTERFACE_ATTRIBUTE
-void *__tsan_memmove(void *dest, const void *src, uptr count);
-
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_func_entry(void *call_pc);
 SANITIZER_INTERFACE_ATTRIBUTE void __tsan_func_exit();
 

llvm/lib/Transforms/Instrumentation/ThreadSanitizer.cpp

@@ -341,13 +341,13 @@ void ThreadSanitizer::initialize(Module &M) {
   }
 
   MemmoveFn =
-      M.getOrInsertFunction("__tsan_memmove", Attr, IRB.getInt8PtrTy(),
+      M.getOrInsertFunction("memmove", Attr, IRB.getInt8PtrTy(),
                             IRB.getInt8PtrTy(), IRB.getInt8PtrTy(), IntptrTy);
   MemcpyFn =
-      M.getOrInsertFunction("__tsan_memcpy", Attr, IRB.getInt8PtrTy(),
+      M.getOrInsertFunction("memcpy", Attr, IRB.getInt8PtrTy(),
                             IRB.getInt8PtrTy(), IRB.getInt8PtrTy(), IntptrTy);
   MemsetFn =
-      M.getOrInsertFunction("__tsan_memset", Attr, IRB.getInt8PtrTy(),
+      M.getOrInsertFunction("memset", Attr, IRB.getInt8PtrTy(),
                             IRB.getInt8PtrTy(), IRB.getInt32Ty(), IntptrTy);
 }
 

llvm/test/Instrumentation/ThreadSanitizer/tsan_basic.ll

@@ -35,7 +35,7 @@ entry:
     tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %x, i8* align 4 %y, i64 16, i1 false)
     ret void
 ; CHECK: define void @MemCpyTest
-; CHECK: call i8* @__tsan_memcpy
+; CHECK: call i8* @memcpy
 ; CHECK: ret void
 }
 
@@ -44,7 +44,7 @@ entry:
     tail call void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* align 4 %x, i8* align 4 %y, i64 16, i1 false)
     ret void
 ; CHECK: define void @MemCpyInlineTest
-; CHECK: call i8* @__tsan_memcpy
+; CHECK: call i8* @memcpy
 ; CHECK: ret void
 }
 
@@ -53,7 +53,7 @@ entry:
     tail call void @llvm.memmove.p0i8.p0i8.i64(i8* align 4 %x, i8* align 4 %y, i64 16, i1 false)
     ret void
 ; CHECK: define void @MemMoveTest
-; CHECK: call i8* @__tsan_memmove
+; CHECK: call i8* @memmove
 ; CHECK: ret void
 }
 
@@ -62,7 +62,7 @@ entry:
     tail call void @llvm.memset.p0i8.i64(i8* align 4 %x, i8 77, i64 16, i1 false)
     ret void
 ; CHECK: define void @MemSetTest
-; CHECK: call i8* @__tsan_memset
+; CHECK: call i8* @memset
 ; CHECK: ret void
 }
 
@@ -71,7 +71,7 @@ entry:
     tail call void @llvm.memset.inline.p0i8.i64(i8* align 4 %x, i8 77, i64 16, i1 false)
     ret void
 ; CHECK: define void @MemSetInlineTest
-; CHECK: call i8* @__tsan_memset
+; CHECK: call i8* @memset
 ; CHECK: ret void
 }