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[PGO] Allow value profile writer interface to allocated target buffer

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Raw profile writer needs to write all data of one kind in one continuous block,
so the buffer needs to be pre-allocated and passed to the writer method in
pieces for function profile data. The change adds the support for raw value data
writing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254219 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Xinliang David Li 2015-11-28 05:37:01 +00:00
parent 52a156fb30
commit 9bee4a8249
3 changed files with 18 additions and 13 deletions
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7
include/llvm/ProfileData/InstrProf.h
View File

@ -513,7 +513,8 @@ typedef struct ValueProfData {
/// All data in the instance are properly byte swapped. The input
/// data is assumed to be in little endian order.
static ErrorOr<std::unique_ptr<ValueProfData>>
getValueProfData(const unsigned char *D, const unsigned char *const BufferEnd,
getValueProfData(const unsigned char *SrcBuffer,
const unsigned char *const SrcBufferEnd,
support::endianness SrcDataEndianness);
/// Swap byte order from \c Endianness order to host byte order.
void swapBytesToHost(support::endianness Endianness);
@ -596,8 +597,8 @@ uint32_t getValueProfDataSizeRT(const ValueProfRuntimeRecord *Record);
/* Return a ValueProfData instance that stores the data collected at runtime. */
ValueProfData *
serializeValueProfDataFromRT(const ValueProfRuntimeRecord *Record);
serializeValueProfDataFromRT(const ValueProfRuntimeRecord *Record,
ValueProfData *Dst);
/*! \brief Return the \c ValueProfRecord header size including the
* padding bytes.

22
lib/ProfileData/InstrProf.cpp
View File

@ -170,10 +170,12 @@ void serializeValueProfRecordFrom(ValueProfRecord *This,
}
}
ValueProfData *serializeValueProfDataFrom(ValueProfRecordClosure *Closure) {
ValueProfData *serializeValueProfDataFrom(ValueProfRecordClosure *Closure,
ValueProfData *DstData) {
uint32_t TotalSize = getValueProfDataSize(Closure);
ValueProfData *VPD = Closure->AllocValueProfData(TotalSize);
ValueProfData *VPD =
DstData ? DstData : Closure->AllocValueProfData(TotalSize);
VPD->TotalSize = TotalSize;
VPD->NumValueKinds = Closure->GetNumValueKinds(Closure->Record);
@ -259,7 +261,7 @@ ValueProfData::serializeFrom(const InstrProfRecord &Record) {
InstrProfRecordClosure.Record = &Record;
std::unique_ptr<ValueProfData> VPD(
serializeValueProfDataFrom(&InstrProfRecordClosure));
serializeValueProfDataFrom(&InstrProfRecordClosure, 0));
return VPD;
}
@ -367,16 +369,18 @@ uint32_t getValueProfDataSizeRT(const ValueProfRuntimeRecord *Record) {
}
/* Return a ValueProfData instance that stores the data collected
from runtime. */
* from runtime. If \c DstData is provided by the caller, the value
* profile data will be store in *DstData and DstData is returned,
* otherwise the method will allocate space for the value data and
* return pointer to the newly allocated space.
*/
ValueProfData *
serializeValueProfDataFromRT(const ValueProfRuntimeRecord *Record) {
serializeValueProfDataFromRT(const ValueProfRuntimeRecord *Record,
ValueProfData *DstData) {
RTRecordClosure.Record = Record;
return serializeValueProfDataFrom(&RTRecordClosure);
return serializeValueProfDataFrom(&RTRecordClosure, DstData);
}
void ValueProfRecord::deserializeTo(InstrProfRecord &Record,
InstrProfRecord::ValueMapType *VMap) {
Record.reserveSites(Kind, NumValueSites);

2
unittests/ProfileData/InstrProfTest.cpp
View File

@ -409,7 +409,7 @@ TEST_F(InstrProfTest, runtime_value_prof_data_read_write) {
initializeValueProfRuntimeRecord(&RTRecord, &NumValueSites[0],
&ValueProfNodes[0]);
ValueProfData *VPData = serializeValueProfDataFromRT(&RTRecord);
ValueProfData *VPData = serializeValueProfDataFromRT(&RTRecord, 0);
InstrProfRecord Record("caller", 0x1234, {1ULL << 31, 2});