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Add CCAssignToStackABISizeAlign for convenience in

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dealing with types whose size & alignment are
different on different subtargets.  Use it for x86 f80.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43988 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2007-11-10 22:07:15 +00:00
parent e7bbd41af2
commit e3ef744d3e
3 changed files with 24 additions and 5 deletions
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7
lib/Target/TargetCallingConv.td
View File

@ -66,6 +66,13 @@ class CCAssignToStack<int size, int align> : CCAction {
int Align = align;
}
/// CCAssignToStackABISizeAlign - This action always matches: it assigns
/// the value to a stack slot of the ABISize and ABIAlignment for the type,
/// which may depend on the target or subtarget.
/// "ignored" is here because an empty arg list does not work.
class CCAssignToStackABISizeAlign<int ignored> : CCAction {
}
/// CCStructAssign - This action always matches: it will use the C ABI and
/// the register availability to decided whether to assign to a set of
/// registers or to a stack slot.

13
lib/Target/X86/X86CallingConv.td
View File

@ -118,10 +118,12 @@ def CC_X86_64_C : CallingConv<[
// 8-byte aligned if there are no more registers to hold them.
CCIfType<[i32, i64, f32, f64], CCAssignToStack<8, 8>>,
// Long doubles get 16-byte stack slots that are 16-byte aligned.
// Long doubles get stack slots whose size and alignment depends on the
// subtarget.
CCIfType<[f80], CCAssignToStackABISizeAlign<0>>,
// Vectors get 16-byte stack slots that are 16-byte aligned.
CCIfType<[f80, v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
CCAssignToStack<16, 16>>,
CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCAssignToStack<16, 16>>,
// __m64 vectors get 8-byte stack slots that are 8-byte aligned.
CCIfType<[v8i8, v4i16, v2i32, v1i64], CCAssignToStack<8, 8>>
@ -177,8 +179,9 @@ def CC_X86_32_Common : CallingConv<[
// Doubles get 8-byte slots that are 4-byte aligned.
CCIfType<[f64], CCAssignToStack<8, 4>>,
// Long doubles get 16-byte slots that are 4-byte aligned.
CCIfType<[f80], CCAssignToStack<16, 4>>,
// Long doubles get slots whose size and alignment depends on the
// subtarget.
CCIfType<[f80], CCAssignToStackABISizeAlign<0>>,
// The first 4 vector arguments are passed in XMM registers.
CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],

9
utils/TableGen/CallingConvEmitter.cpp
View File

@ -120,6 +120,15 @@ void CallingConvEmitter::EmitAction(Record *Action,
O << IndentStr << "State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset"
<< Counter << ", LocVT, LocInfo));\n";
O << IndentStr << "return false;\n";
} else if (Action->isSubClassOf("CCAssignToStackABISizeAlign")) {
O << IndentStr << "unsigned Offset" << ++Counter
<< " = State.AllocateStack(State.getTarget().getTargetData()"
"->getABITypeSize(MVT::getTypeForValueType(LocVT)),\n";
O << IndentStr << " State.getTarget().getTargetData()"
"->getABITypeAlignment(MVT::getTypeForValueType(LocVT)));\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");
O << IndentStr << "LocVT = " << getEnumName(getValueType(DestTy)) <<";\n";