Try to appease VS 2015 warnings from http://reviews.llvm.org/D11890

ByteSize and BitSize should not be size_t but unsigned, considering

1) They are at most 2^16 and 2^19, respectively.
2) BitSize is an argument to Type::getIntNTy which takes unsigned.

Also, use the correct utostr instead itostr and cache the string result.

Thanks to James Touton for reporting this!

llvm-svn: 245167

1 files changed, 19 insertions, 21 deletions

diff --git a/llvm/lib/Transforms/Instrumentation/ThreadSanitizer.cpp b/llvm/lib/Transforms/Instrumentation/ThreadSanitizer.cpp
index 1a46bbb8612..9331e1d2b3f 100644
--- a/llvm/lib/Transforms/Instrumentation/ThreadSanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/ThreadSanitizer.cpp
@@ -142,37 +142,35 @@ void ThreadSanitizer::initializeCallbacks(Module &M) {
       M.getOrInsertFunction("__tsan_func_exit", IRB.getVoidTy(), nullptr));
   OrdTy = IRB.getInt32Ty();
   for (size_t i = 0; i < kNumberOfAccessSizes; ++i) {
-    const size_t ByteSize = 1 << i;
-    const size_t BitSize = ByteSize * 8;
-    SmallString<32> ReadName("__tsan_read" + itostr(ByteSize));
+    const unsigned ByteSize = 1U << i;
+    const unsigned BitSize = ByteSize * 8;
+    std::string ByteSizeStr = utostr(ByteSize);
+    std::string BitSizeStr = utostr(BitSize);
+    SmallString<32> ReadName("__tsan_read" + ByteSizeStr);
     TsanRead[i] = checkSanitizerInterfaceFunction(M.getOrInsertFunction(
         ReadName, IRB.getVoidTy(), IRB.getInt8PtrTy(), nullptr));
 
-    SmallString<32> WriteName("__tsan_write" + itostr(ByteSize));
+    SmallString<32> WriteName("__tsan_write" + ByteSizeStr);
     TsanWrite[i] = checkSanitizerInterfaceFunction(M.getOrInsertFunction(
         WriteName, IRB.getVoidTy(), IRB.getInt8PtrTy(), nullptr));
 
-    SmallString<64> UnalignedReadName("__tsan_unaligned_read" +
-        itostr(ByteSize));
+    SmallString<64> UnalignedReadName("__tsan_unaligned_read" + ByteSizeStr);
     TsanUnalignedRead[i] =
         checkSanitizerInterfaceFunction(M.getOrInsertFunction(
             UnalignedReadName, IRB.getVoidTy(), IRB.getInt8PtrTy(), nullptr));
 
-    SmallString<64> UnalignedWriteName("__tsan_unaligned_write" +
-        itostr(ByteSize));
+    SmallString<64> UnalignedWriteName("__tsan_unaligned_write" + ByteSizeStr);
     TsanUnalignedWrite[i] =
         checkSanitizerInterfaceFunction(M.getOrInsertFunction(
             UnalignedWriteName, IRB.getVoidTy(), IRB.getInt8PtrTy(), nullptr));
 
     Type *Ty = Type::getIntNTy(M.getContext(), BitSize);
     Type *PtrTy = Ty->getPointerTo();
-    SmallString<32> AtomicLoadName("__tsan_atomic" + itostr(BitSize) +
-                                   "_load");
+    SmallString<32> AtomicLoadName("__tsan_atomic" + BitSizeStr + "_load");
     TsanAtomicLoad[i] = checkSanitizerInterfaceFunction(
         M.getOrInsertFunction(AtomicLoadName, Ty, PtrTy, OrdTy, nullptr));
 
-    SmallString<32> AtomicStoreName("__tsan_atomic" + itostr(BitSize) +
-                                    "_store");
+    SmallString<32> AtomicStoreName("__tsan_atomic" + BitSizeStr + "_store");
     TsanAtomicStore[i] = checkSanitizerInterfaceFunction(M.getOrInsertFunction(
         AtomicStoreName, IRB.getVoidTy(), PtrTy, Ty, OrdTy, nullptr));
 
@@ -201,7 +199,7 @@ void ThreadSanitizer::initializeCallbacks(Module &M) {
           M.getOrInsertFunction(RMWName, Ty, PtrTy, Ty, OrdTy, nullptr));
     }
 
-    SmallString<32> AtomicCASName("__tsan_atomic" + itostr(BitSize) +
+    SmallString<32> AtomicCASName("__tsan_atomic" + BitSizeStr +
                                   "_compare_exchange_val");
     TsanAtomicCAS[i] = checkSanitizerInterfaceFunction(M.getOrInsertFunction(
         AtomicCASName, Ty, PtrTy, Ty, Ty, OrdTy, OrdTy, nullptr));
@@ -513,8 +511,8 @@ bool ThreadSanitizer::instrumentAtomic(Instruction *I, const DataLayout &DL) {
     int Idx = getMemoryAccessFuncIndex(Addr, DL);
     if (Idx < 0)
       return false;
-    const size_t ByteSize = 1 << Idx;
-    const size_t BitSize = ByteSize * 8;
+    const unsigned ByteSize = 1U << Idx;
+    const unsigned BitSize = ByteSize * 8;
     Type *Ty = Type::getIntNTy(IRB.getContext(), BitSize);
     Type *PtrTy = Ty->getPointerTo();
     Value *Args[] = {IRB.CreatePointerCast(Addr, PtrTy),
@@ -527,8 +525,8 @@ bool ThreadSanitizer::instrumentAtomic(Instruction *I, const DataLayout &DL) {
     int Idx = getMemoryAccessFuncIndex(Addr, DL);
     if (Idx < 0)
       return false;
-    const size_t ByteSize = 1 << Idx;
-    const size_t BitSize = ByteSize * 8;
+    const unsigned ByteSize = 1U << Idx;
+    const unsigned BitSize = ByteSize * 8;
     Type *Ty = Type::getIntNTy(IRB.getContext(), BitSize);
     Type *PtrTy = Ty->getPointerTo();
     Value *Args[] = {IRB.CreatePointerCast(Addr, PtrTy),
@@ -544,8 +542,8 @@ bool ThreadSanitizer::instrumentAtomic(Instruction *I, const DataLayout &DL) {
     Function *F = TsanAtomicRMW[RMWI->getOperation()][Idx];
     if (!F)
       return false;
-    const size_t ByteSize = 1 << Idx;
-    const size_t BitSize = ByteSize * 8;
+    const unsigned ByteSize = 1U << Idx;
+    const unsigned BitSize = ByteSize * 8;
     Type *Ty = Type::getIntNTy(IRB.getContext(), BitSize);
     Type *PtrTy = Ty->getPointerTo();
     Value *Args[] = {IRB.CreatePointerCast(Addr, PtrTy),
@@ -558,8 +556,8 @@ bool ThreadSanitizer::instrumentAtomic(Instruction *I, const DataLayout &DL) {
     int Idx = getMemoryAccessFuncIndex(Addr, DL);
     if (Idx < 0)
       return false;
-    const size_t ByteSize = 1 << Idx;
-    const size_t BitSize = ByteSize * 8;
+    const unsigned ByteSize = 1U << Idx;
+    const unsigned BitSize = ByteSize * 8;
     Type *Ty = Type::getIntNTy(IRB.getContext(), BitSize);
     Type *PtrTy = Ty->getPointerTo();
     Value *Args[] = {IRB.CreatePointerCast(Addr, PtrTy),