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Fix PR2977: LegalizeTypes support for expanding 

VAARG.

llvm-svn: 58379
This commit is contained in:
Duncan Sands 2008-10-29 14:25:28 +00:00
parent 17e678be87
commit fbb10bbec4
5 changed files with 30 additions and 0 deletions
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1
llvm/lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
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@ -575,6 +575,7 @@ void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;

1
llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
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@ -960,6 +960,7 @@ void DAGTypeLegalizer::ExpandIntegerResult(SDNode *N, unsigned ResNo) {
case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
case ISD::ANY_EXTEND: ExpandIntRes_ANY_EXTEND(N, Lo, Hi); break;
case ISD::AssertSext: ExpandIntRes_AssertSext(N, Lo, Hi); break;

1
llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
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@ -516,6 +516,7 @@ private:
void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDValue &Lo, SDValue &Hi);
void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
void ExpandRes_NormalLoad (SDNode *N, SDValue &Lo, SDValue &Hi);
void ExpandRes_VAARG (SDNode *N, SDValue &Lo, SDValue &Hi);
// Generic Operand Expansion.
SDValue ExpandOp_BIT_CONVERT (SDNode *N);

17
llvm/lib/CodeGen/SelectionDAG/LegalizeTypesGeneric.cpp
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@ -171,6 +171,23 @@ void DAGTypeLegalizer::ExpandRes_NormalLoad(SDNode *N, SDValue &Lo,
ReplaceValueWith(SDValue(N, 1), Chain);
}
void DAGTypeLegalizer::ExpandRes_VAARG(SDNode *N, SDValue &Lo, SDValue &Hi) {
MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
SDValue Chain = N->getOperand(0);
SDValue Ptr = N->getOperand(1);
Lo = DAG.getVAArg(NVT, Chain, Ptr, N->getOperand(2));
Hi = DAG.getVAArg(NVT, Lo.getValue(1), Ptr, N->getOperand(2));
// Handle endianness of the load.
if (TLI.isBigEndian())
std::swap(Lo, Hi);
// Modified the chain - switch anything that used the old chain to use
// the new one.
ReplaceValueWith(SDValue(N, 1), Hi.getValue(1));
}
//===--------------------------------------------------------------------===//
// Generic Operand Expansion.

10
llvm/test/CodeGen/X86/2008-10-29-ExpandVAARG.ll Normal file
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@ -0,0 +1,10 @@
; RUN: llvm-as < %s | llc -march=x86
; PR2977
define i8* @ap_php_conv_p2(){
entry:
%ap.addr = alloca i8* ; <i8**> [#uses=36]
br label %sw.bb301
sw.bb301:
%0 = va_arg i8** %ap.addr, i64 ; <i64> [#uses=1]
br label %sw.bb301
}