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Rename VATemp to VectorAlias

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Rename VATemp to VectorAlias. It is still off by default.

Also, minor change for setting noop for scalar variable aliased to a
vector.
This commit is contained in:
Gu, Junjie
2024-03-01 18:38:57 +00:00
committed by igcbot
parent e71670750c
commit 5b7b58787e
4 changed files with 18 additions and 11 deletions
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21
IGC/Compiler/CISACodeGen/VariableReuseAnalysis.cpp
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@ -460,7 +460,7 @@ void VariableReuseAnalysis::postProcessing()
if (!m_DeSSA || control == 0)
return;
// VATemp = 0x10
// VectorAlias = 0x10
DenseMap<Value*, int> dessaRootVisited;
auto IS = m_baseVecMap.begin();
auto IE = m_baseVecMap.end();
@ -502,7 +502,7 @@ void VariableReuseAnalysis::postProcessing()
setLifeTimeStartPos(aliaseeRoot, AllVals, theBC);
}
// VAtemp = 0x20, for other vector values.
// VectorAlias = 0x20, for other vector values.
if (control < 2)
return;
@ -589,8 +589,8 @@ bool VariableReuseAnalysis::getVectorIndicesIfConstant(
void VariableReuseAnalysis::visitExtractElementInst(ExtractElementInst& I)
{
const auto control = ((m_pCtx->getVectorCoalescingControl() >> 2) & 0x3);
// VATemp=0x4 : for isolated values
// =0x8 : for both isolated and non-isolated values
// VectorAlias=0x4 : for isolated values
// =0x8 : for both isolated and non-isolated values
if (control == 0) {
return;
}
@ -1076,9 +1076,9 @@ bool VariableReuseAnalysis::getElementValue(
void VariableReuseAnalysis::InsertElementAliasing(Function* F)
{
// Do it if VATemp != 0.
// VATemp=0x1: subvec aliasing for isolated values (getRootValue()=null)
// =0x2: subvec aliasing for both isolated and non-isolated value)
// Do it if VectorAlias != 0.
// VectorAlias=0x1: subvec aliasing for isolated values (getRootValue()=null)
// =0x2: subvec aliasing for both isolated and non-isolated value)
const auto control = (m_pCtx->getVectorCoalescingControl() & 0x3);
if (control == 0) {
return;
@ -1361,6 +1361,13 @@ bool VariableReuseAnalysis::processInsertTo(VecInsEltInfoTy& AllIEIs)
addVecAlias(EEI_nv, Base_nv, j);
}
}
else {
// scalar
InsertElementInst* IEI = AllIEIs[V_ix].IEI;
if (m_DeSSA->isNoopAliaser(IEI))
continue;
m_HasBecomeNoopInsts[IEI] = 1;
}
hasAlias = true;
}
return hasAlias;