[SYCL][NFC] Fix comparison warnings in Base64, PropertySetIO (#2329)

Signed-off-by: Sergey Semenov <[email protected]>

Author: sergey-semenov

llvm/include/llvm/Support/PropertySetIO.h

@@ -100,7 +100,7 @@ class PropertyValue {
       llvm_unreachable("must be BYTE_ARRAY value");
     SizeTy Res = 0;
 
-    for (auto I = 0; I < sizeof(SizeTy); ++I)
+    for (size_t I = 0; I < sizeof(SizeTy); ++I)
       Res |= (SizeTy)Val.ByteArrayVal[I] << (8 * I);
     return Res;
   }

llvm/lib/Support/Base64.cpp

@@ -80,7 +80,7 @@ class Base64Impl {
     size_t Off = 0;
 
     // encode full byte triples
-    for (auto TriB = 0; TriB < SrcSize / 3; ++TriB) {
+    for (size_t TriB = 0; TriB < SrcSize / 3; ++TriB) {
       Off = TriB * 3;
       byte Byte0 = Src[Off++];
       byte Byte1 = Src[Off++];
@@ -116,7 +116,7 @@ class Base64Impl {
     size_t DstOff = 0;
 
     // decode full quads
-    for (auto Qch = 0; Qch < SrcSize / 4; ++Qch, SrcOff += 4, DstOff += 3) {
+    for (size_t Qch = 0; Qch < SrcSize / 4; ++Qch, SrcOff += 4, DstOff += 3) {
       byte Ch[4];
       Expected<bool> TrRes = decode4(Src + SrcOff, Ch);
 

llvm/lib/Support/PropertySetIO.cpp

@@ -159,7 +159,7 @@ PropertyValue::PropertyValue(const byte *Data, SizeTy DataBitSize) {
   Val.ByteArrayVal = new byte[SizeFieldSize + DataSize];
 
   // Write the size into first bytes.
-  for (auto I = 0; I < SizeFieldSize; ++I) {
+  for (size_t I = 0; I < SizeFieldSize; ++I) {
     Val.ByteArrayVal[I] = (byte)DataBitSize;
     DataBitSize >>= ByteSizeInBits;
   }