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Use the target options specified on a function to reset the back-end.

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During LTO, the target options on functions within the same Module may
change. This would necessitate resetting some of the back-end. Do this for X86,
because it's a Friday afternoon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178917 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2013-04-05 21:52:40 +00:00
parent b6cfeb63f8
commit 13bbe1f52e
6 changed files with 112 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/CodeGen/TargetLoweringBase.cpp
+44 -39
View File
@@ -620,12 +620,56 @@ static void InitCmpLibcallCCs(ISD::CondCode *CCs) {
TargetLoweringBase::TargetLoweringBase(const TargetMachine &tm,
const TargetLoweringObjectFile *tlof)
: TM(tm), TD(TM.getDataLayout()), TLOF(*tlof) {
initActions();
// Perform these initializations only once.
IsLittleEndian = TD->isLittleEndian();
PointerTy = MVT::getIntegerVT(8*TD->getPointerSize(0));
MaxStoresPerMemset = MaxStoresPerMemcpy = MaxStoresPerMemmove = 8;
MaxStoresPerMemsetOptSize = MaxStoresPerMemcpyOptSize
= MaxStoresPerMemmoveOptSize = 4;
UseUnderscoreSetJmp = false;
UseUnderscoreLongJmp = false;
SelectIsExpensive = false;
IntDivIsCheap = false;
Pow2DivIsCheap = false;
JumpIsExpensive = false;
PredictableSelectIsExpensive = false;
StackPointerRegisterToSaveRestore = 0;
ExceptionPointerRegister = 0;
ExceptionSelectorRegister = 0;
BooleanContents = UndefinedBooleanContent;
BooleanVectorContents = UndefinedBooleanContent;
SchedPreferenceInfo = Sched::ILP;
JumpBufSize = 0;
JumpBufAlignment = 0;
MinFunctionAlignment = 0;
PrefFunctionAlignment = 0;
PrefLoopAlignment = 0;
MinStackArgumentAlignment = 1;
ShouldFoldAtomicFences = false;
InsertFencesForAtomic = false;
SupportJumpTables = true;
MinimumJumpTableEntries = 4;
InitLibcallNames(LibcallRoutineNames, TM);
InitCmpLibcallCCs(CmpLibcallCCs);
InitLibcallCallingConvs(LibcallCallingConvs);
}
TargetLoweringBase::~TargetLoweringBase() {
delete &TLOF;
}
void TargetLoweringBase::initActions() {
// All operations default to being supported.
memset(OpActions, 0, sizeof(OpActions));
memset(LoadExtActions, 0, sizeof(LoadExtActions));
memset(TruncStoreActions, 0, sizeof(TruncStoreActions));
memset(IndexedModeActions, 0, sizeof(IndexedModeActions));
memset(CondCodeActions, 0, sizeof(CondCodeActions));
memset(RegClassForVT, 0,MVT::LAST_VALUETYPE*sizeof(TargetRegisterClass*));
memset(TargetDAGCombineArray, 0, array_lengthof(TargetDAGCombineArray));
// Set default actions for various operations.
for (unsigned VT = 0; VT != (unsigned)MVT::LAST_VALUETYPE; ++VT) {
@@ -702,45 +746,6 @@ TargetLoweringBase::TargetLoweringBase(const TargetMachine &tm,
// here is to inform DAG Legalizer to replace DEBUGTRAP with TRAP.
//
setOperationAction(ISD::DEBUGTRAP, MVT::Other, Expand);
IsLittleEndian = TD->isLittleEndian();
PointerTy = MVT::getIntegerVT(8*TD->getPointerSize(0));
memset(RegClassForVT, 0,MVT::LAST_VALUETYPE*sizeof(TargetRegisterClass*));
memset(TargetDAGCombineArray, 0, array_lengthof(TargetDAGCombineArray));
MaxStoresPerMemset = MaxStoresPerMemcpy = MaxStoresPerMemmove = 8;
MaxStoresPerMemsetOptSize = MaxStoresPerMemcpyOptSize
= MaxStoresPerMemmoveOptSize = 4;
UseUnderscoreSetJmp = false;
UseUnderscoreLongJmp = false;
SelectIsExpensive = false;
IntDivIsCheap = false;
Pow2DivIsCheap = false;
JumpIsExpensive = false;
PredictableSelectIsExpensive = false;
StackPointerRegisterToSaveRestore = 0;
ExceptionPointerRegister = 0;
ExceptionSelectorRegister = 0;
BooleanContents = UndefinedBooleanContent;
BooleanVectorContents = UndefinedBooleanContent;
SchedPreferenceInfo = Sched::ILP;
JumpBufSize = 0;
JumpBufAlignment = 0;
MinFunctionAlignment = 0;
PrefFunctionAlignment = 0;
PrefLoopAlignment = 0;
MinStackArgumentAlignment = 1;
ShouldFoldAtomicFences = false;
InsertFencesForAtomic = false;
SupportJumpTables = true;
MinimumJumpTableEntries = 4;
InitLibcallNames(LibcallRoutineNames, TM);
InitCmpLibcallCCs(CmpLibcallCCs);
InitLibcallCallingConvs(LibcallCallingConvs);
}
TargetLoweringBase::~TargetLoweringBase() {
delete &TLOF;
}
MVT TargetLoweringBase::getScalarShiftAmountTy(EVT LHSTy) const {