restore __llvm_profile_get_num_vtable, and swap the order of two header fields in raw profile header

Author: mingmingl-llvm

compiler-rt/include/profile/InstrProfData.inc

@@ -166,8 +166,8 @@ INSTR_PROF_RAW_HEADER(uint64_t, CountersDelta,
 INSTR_PROF_RAW_HEADER(uint64_t, BitmapDelta,
                       (uintptr_t)BitmapBegin - (uintptr_t)DataBegin)
 INSTR_PROF_RAW_HEADER(uint64_t, NamesDelta, (uintptr_t)NamesBegin)
-INSTR_PROF_RAW_HEADER(uint64_t, VNamesSize, VNamesSize)
 INSTR_PROF_RAW_HEADER(uint64_t, NumVTables, NumVTables)
+INSTR_PROF_RAW_HEADER(uint64_t, VNamesSize, VNamesSize)
 INSTR_PROF_RAW_HEADER(uint64_t, ValueKindLast, IPVK_Last)
 #undef INSTR_PROF_RAW_HEADER
 /* INSTR_PROF_RAW_HEADER  end */

compiler-rt/lib/profile/InstrProfilingBuffer.c

@@ -93,7 +93,9 @@ uint64_t __llvm_profile_get_data_size(const __llvm_profile_data *Begin,
 COMPILER_RT_VISIBILITY
 uint64_t __llvm_profile_get_num_vtable(const VTableProfData *Begin,
                                        const VTableProfData *End) {
-  return End - Begin;
+  // Convert pointers to intptr_t to use integer arithmetic.
+  intptr_t EndI = (intptr_t)End, BeginI = (intptr_t)Begin;
+  return (EndI - BeginI) / sizeof(VTableProfData);
 }
 
 COMPILER_RT_VISIBILITY

llvm/include/llvm/ProfileData/InstrProfData.inc

@@ -166,8 +166,8 @@ INSTR_PROF_RAW_HEADER(uint64_t, CountersDelta,
 INSTR_PROF_RAW_HEADER(uint64_t, BitmapDelta,
                       (uintptr_t)BitmapBegin - (uintptr_t)DataBegin)
 INSTR_PROF_RAW_HEADER(uint64_t, NamesDelta, (uintptr_t)NamesBegin)
-INSTR_PROF_RAW_HEADER(uint64_t, VNamesSize, VNamesSize)
 INSTR_PROF_RAW_HEADER(uint64_t, NumVTables, NumVTables)
+INSTR_PROF_RAW_HEADER(uint64_t, VNamesSize, VNamesSize)
 INSTR_PROF_RAW_HEADER(uint64_t, ValueKindLast, IPVK_Last)
 #undef INSTR_PROF_RAW_HEADER
 /* INSTR_PROF_RAW_HEADER  end */