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Added support for "case when" (valueless) switch cases

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This commit is contained in:
Brian Fiete 2020-02-23 06:14:14 -08:00
parent 3fd81fc966
commit 857c1c384a
5 changed files with 25 additions and 11 deletions
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6
IDEHelper/Backend/BeMCContext.cpp
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@ -7576,16 +7576,14 @@ void BeMCContext::DoInstCombinePass()
continue;
auto vregInfoFrom = mVRegInfo[remapFrom];
auto vregInfoTo = mVRegInfo[remapTo];
int bestVRegIdx = (vregInfoFrom->mDefOrderIdx < vregInfoTo->mDefOrderIdx) ? remapFrom : remapTo;
int bestVRegIdx = remapTo;
//auto itr = defMap.find(remapTo);
//if (itr != defMap.end())
int* prevBestVRegIdxPtr = NULL;
if (defMap.TryGetValue(remapTo, &prevBestVRegIdxPtr))
{
auto prevBestVRegIdx = *prevBestVRegIdxPtr;
if (mVRegInfo[bestVRegIdx]->mDefOrderIdx < mVRegInfo[prevBestVRegIdx]->mDefOrderIdx)
defMap[remapTo] = bestVRegIdx;
}
else
defMap[remapTo] = bestVRegIdx;

2
IDEHelper/Backend/BeMCContext.h
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@ -749,7 +749,6 @@ public:
// Must be refreshed with RefreshRefCounts
int mRefCount;
int mAssignCount;
int mDefOrderIdx; // Indicates instruction # in def assignment
BeMCBlock* mClosedBlock;
int mClosedInstIdx;
@ -790,7 +789,6 @@ public:
mVolatileVRegSave = -1;
mMustExist = false;
mIsRetVal = false;
mDefOrderIdx = -1;
mClosedBlock = NULL;
mClosedInstIdx = -1;

6
IDEHelper/Compiler/BfReducer.cpp
View file

@ -3264,7 +3264,11 @@ BfSwitchStatement* BfReducer::CreateSwitchStatement(BfTokenNode* tokenNode)
{
auto nextNode = mVisitorPos.GetNext();
whenToken = BfNodeDynCast<BfTokenNode>(nextNode);
if ((whenToken != NULL) && (whenToken->GetToken() != BfToken_When))
if ((whenToken != NULL) && (whenToken->GetToken() == BfToken_When))
{
mVisitorPos.MoveNext();
}
else
whenToken = NULL;
}
if (whenToken != NULL)

14
IDEHelper/Compiler/BfStmtEvaluator.cpp
View file

@ -4397,6 +4397,20 @@ void BfModule::Visit(BfSwitchStatement* switchStmt)
lastDefaultBlock = notEqBB;
}
if ((whenExpr != NULL) && (switchCase->mCaseExpressions.size() == 1))
{
// This was a "case when" expression, always matches
mayHaveMatch = true;
auto notEqBB = mBfIRBuilder->CreateBlock(StrFormat("switch.notEq_when.%d", blockIdx));
mBfIRBuilder->CreateBr(caseBlock);
mBfIRBuilder->AddBlock(notEqBB);
mBfIRBuilder->SetInsertPoint(notEqBB);
lastNotEqBlock = notEqBB;
}
if (lastDefaultBlock)
mBfIRBuilder->SetSwitchDefaultDest(switchStatement, lastDefaultBlock);