Media/intel-graphics-compiler
1
0
Fork 0
mirror of https://github.com/intel/intel-graphics-compiler.git synced 2025-11-04 08:21:06 +08:00
Code Issues Packages Projects Releases Wiki Activity

Recognise all vector aliases within same BB without

Browse Source 
threshold

Add vector aliases as long as all the IE instructions are in the same
BB, regardless of VectorAliasBBThreshold.
This commit is contained in:
Pogotovskii, Pavel
2025-03-28 18:26:30 +00:00
committed by igcbot
parent bd2945b40f
commit 35d6a22cbf
2 changed files with 9 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
IGC/Compiler/CISACodeGen/VariableReuseAnalysis.cpp
View File

@ -958,7 +958,7 @@ bool VariableReuseAnalysis::hasAnotherDCCAsAliasee(Value* V) const
// true : if all elements are inserted with IEI of constant index
// false: otherwise.
bool VariableReuseAnalysis::getAllInsEltsIfAvailable(
InsertElementInst* FirstIEI, VecInsEltInfoTy& AllIEIs)
InsertElementInst* FirstIEI, VecInsEltInfoTy& AllIEIs, bool OnlySameBB)
{
int nelts = getNumElts(FirstIEI);
@ -975,6 +975,9 @@ bool VariableReuseAnalysis::getAllInsEltsIfAvailable(
{
LastIEI = I;
if (OnlySameBB && LastIEI->getParent() != FirstIEI->getParent())
return false;
// For insertElement, it should be in the same dessa CC
// already, as dessa special-handles it. Make sure they
// are indeed in the same CC, otherwise, skip.
@ -1169,8 +1172,9 @@ void VariableReuseAnalysis::InsertElementAliasing(Function* F)
const auto control = (m_pCtx->getVectorCoalescingControl() & 0x3);
// To avoid increasing GRF pressure, skip if F is too large or not an entry
const int32_t NumBBThreshold = IGC_GET_FLAG_VALUE(VectorAliasBBThreshold);
bool OnlySameBB = getNumBBs(F) > NumBBThreshold;
MetaDataUtils* pMdUtils = getAnalysis<MetaDataUtilsWrapper>().getMetaDataUtils();
if (control == 0 || !isEntryFunc(pMdUtils, F) || getNumBBs(F) > NumBBThreshold) {
if (control == 0 || !isEntryFunc(pMdUtils, F)) {
return;
}
for (auto BI = F->begin(), BE = F->end(); BI != BE; ++BI)
@ -1207,7 +1211,7 @@ void VariableReuseAnalysis::InsertElementAliasing(Function* F)
// First, collect all insertElementInst and extractElementInst.
VecInsEltInfoTy AllIEIs;
if (!getAllInsEltsIfAvailable(IEI, AllIEIs)) {
if (!getAllInsEltsIfAvailable(IEI, AllIEIs, OnlySameBB)) {
continue;
}

3
IGC/Compiler/CISACodeGen/VariableReuseAnalysis.hpp
View File

@ -433,7 +433,8 @@ namespace IGC {
llvm::Value*& V, int& V_ix);
bool getAllInsEltsIfAvailable(
llvm::InsertElementInst* FirstIEI,
VecInsEltInfoTy& AllIEIs);
VecInsEltInfoTy& AllIEIs,
bool OnlySameBB = false);
bool processExtractFrom(VecInsEltInfoTy& AllIEIs);
bool processInsertTo(llvm::BasicBlock* BB, VecInsEltInfoTy& AllIEIs);