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LLVM-1163: AAPCS-VFP violation when CPRC allocated to stack

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According to the AAPCS, when a CPRC is allocated to the stack, all other
VFP registers should be marked as unavailable.

I have also modified the rules for allocating non-CPRCs to the stack, to make
it more explicit that all GPRs must be made unavailable. I cannot think of a
case where the old version would produce incorrect answers, so there is no test
for this.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200970 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Oliver Stannard
2014-02-07 11:19:53 +00:00
parent fba9c104b9
commit c8f5d43820
5 changed files with 69 additions and 11 deletions
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26
utils/TableGen/CallingConvEmitter.cpp
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@@ -185,12 +185,34 @@ void CallingConvEmitter::EmitAction(Record *Action,
else
O << "\n" << IndentStr << " State.getTarget().getDataLayout()"
"->getABITypeAlignment(EVT(LocVT).getTypeForEVT(State.getContext()))";
if (Action->isSubClassOf("CCAssignToStackWithShadow"))
O << ", " << getQualifiedName(Action->getValueAsDef("ShadowReg"));
O << ");\n" << IndentStr
<< "State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset"
<< Counter << ", LocVT, LocInfo));\n";
O << IndentStr << "return false;\n";
} else if (Action->isSubClassOf("CCAssignToStackWithShadow")) {
int Size = Action->getValueAsInt("Size");
int Align = Action->getValueAsInt("Align");
ListInit *ShadowRegList = Action->getValueAsListInit("ShadowRegList");
unsigned ShadowRegListNumber = ++Counter;
O << IndentStr << "static const uint16_t ShadowRegList"
<< ShadowRegListNumber << "[] = {\n";
O << IndentStr << " ";
for (unsigned i = 0, e = ShadowRegList->getSize(); i != e; ++i) {
if (i != 0) O << ", ";
O << getQualifiedName(ShadowRegList->getElementAsRecord(i));
}
O << "\n" << IndentStr << "};\n";
O << IndentStr << "unsigned Offset" << ++Counter
<< " = State.AllocateStack("
<< Size << ", " << Align << ", "
<< "ShadowRegList" << ShadowRegListNumber << ", "
<< ShadowRegList->getSize() << ");\n";
O << IndentStr << "State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset"
<< Counter << ", LocVT, LocInfo));\n";
O << IndentStr << "return false;\n";
} else if (Action->isSubClassOf("CCPromoteToType")) {
Record *DestTy = Action->getValueAsDef("DestTy");
MVT::SimpleValueType DestVT = getValueType(DestTy);