Index: compiler-rt/trunk/lib/profile/InstrProfiling.h
===================================================================
--- compiler-rt/trunk/lib/profile/InstrProfiling.h
+++ compiler-rt/trunk/lib/profile/InstrProfiling.h
@@ -131,4 +131,8 @@
 /*! \brief Get the version of the file format. */
 uint64_t __llvm_profile_get_version(void);
 
+/*! \brief Get the number of entries in the profile data section. */
+uint64_t __llvm_profile_get_data_size(const __llvm_profile_data *Begin,
+                                      const __llvm_profile_data *End);
+
 #endif /* PROFILE_INSTRPROFILING_H_ */
Index: compiler-rt/trunk/lib/profile/InstrProfilingBuffer.c
===================================================================
--- compiler-rt/trunk/lib/profile/InstrProfilingBuffer.c
+++ compiler-rt/trunk/lib/profile/InstrProfilingBuffer.c
@@ -23,7 +23,13 @@
       DataBegin, DataEnd, CountersBegin, CountersEnd, NamesBegin, NamesEnd);
 }
 
-#define PROFILE_RANGE_SIZE(Range) (Range##End - Range##Begin)
+COMPILER_RT_VISIBILITY
+uint64_t __llvm_profile_get_data_size(const __llvm_profile_data *Begin,
+                                      const __llvm_profile_data *End) {
+  intptr_t BeginI = (intptr_t)Begin, EndI = (intptr_t)End;
+  return ((EndI + sizeof(__llvm_profile_data) - 1) - BeginI) /
+         sizeof(__llvm_profile_data);
+}
 
 COMPILER_RT_VISIBILITY
 uint64_t __llvm_profile_get_size_for_buffer_internal(
@@ -31,11 +37,12 @@
     const uint64_t *CountersBegin, const uint64_t *CountersEnd,
     const char *NamesBegin, const char *NamesEnd) {
   /* Match logic in __llvm_profile_write_buffer(). */
-  const uint64_t NamesSize = PROFILE_RANGE_SIZE(Names) * sizeof(char);
+  const uint64_t NamesSize = (NamesEnd - NamesBegin) * sizeof(char);
   const uint8_t Padding = __llvm_profile_get_num_padding_bytes(NamesSize);
   return sizeof(__llvm_profile_header) +
-         PROFILE_RANGE_SIZE(Data) * sizeof(__llvm_profile_data) +
-         PROFILE_RANGE_SIZE(Counters) * sizeof(uint64_t) + NamesSize + Padding;
+         (__llvm_profile_get_data_size(DataBegin, DataEnd) *
+          sizeof(__llvm_profile_data)) +
+         (CountersEnd - CountersBegin) * sizeof(uint64_t) + NamesSize + Padding;
 }
 
 COMPILER_RT_VISIBILITY int __llvm_profile_write_buffer(char *Buffer) {
Index: compiler-rt/trunk/lib/profile/InstrProfilingValue.c
===================================================================
--- compiler-rt/trunk/lib/profile/InstrProfilingValue.c
+++ compiler-rt/trunk/lib/profile/InstrProfilingValue.c
@@ -142,8 +142,8 @@
   if (!ValueDataSize)
     return NULL;
 
-  ValueDataArray =
-      (ValueProfData **)calloc(DataEnd - DataBegin, sizeof(void *));
+  ValueDataArray = (ValueProfData **)calloc(
+      __llvm_profile_get_data_size(DataBegin, DataEnd), sizeof(void *));
   if (!ValueDataArray)
     PROF_OOM_RETURN("Failed to write value profile data ");
 
Index: compiler-rt/trunk/lib/profile/InstrProfilingWriter.c
===================================================================
--- compiler-rt/trunk/lib/profile/InstrProfilingWriter.c
+++ compiler-rt/trunk/lib/profile/InstrProfilingWriter.c
@@ -144,7 +144,7 @@
     const char *NamesBegin, const char *NamesEnd) {
 
   /* Calculate size of sections. */
-  const uint64_t DataSize = DataEnd - DataBegin;
+  const uint64_t DataSize = __llvm_profile_get_data_size(DataBegin, DataEnd);
   const uint64_t CountersSize = CountersEnd - CountersBegin;
   const uint64_t NamesSize = NamesEnd - NamesBegin;
   const uint64_t Padding = __llvm_profile_get_num_padding_bytes(NamesSize);