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More ppc32 byval handling (bug fixes). Things

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are looking pretty good now.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48043 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2008-03-08 01:41:42 +00:00
parent 27b7db549e
commit 7f96f3912e
1 changed files with 23 additions and 3 deletions
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26
lib/Target/PowerPC/PPCISelLowering.cpp
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@ -1375,16 +1375,36 @@ PPCTargetLowering::LowerFORMAL_ARGUMENTS(SDOperand Op,
// FIXME the codegen can be much improved in some cases.
// We do not have to keep everything in memory.
if (isByVal) {
// Double word align in ELF
if (Expand && isELF32_ABI) GPR_idx += (GPR_idx % 2);
// ObjSize is the true size, ArgSize rounded up to multiple of registers.
ObjSize = (Flags & ISD::ParamFlags::ByValSize) >>
ISD::ParamFlags::ByValSizeOffs;
ArgSize = ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
// Double word align in ELF
if (Expand && isELF32_ABI) GPR_idx += (GPR_idx % 2);
// Objects of size 1 and 2 are right justified, everything else is
// left justified. This means the memory address is adjusted forwards.
if (ObjSize==1 || ObjSize==2) {
CurArgOffset = CurArgOffset + (4 - ObjSize);
}
// The value of the object is its address.
int FI = MFI->CreateFixedObject(ObjSize, CurArgOffset);
SDOperand FIN = DAG.getFrameIndex(FI, PtrVT);
ArgValues.push_back(FIN);
if (ObjSize==1 || ObjSize==2) {
if (GPR_idx != Num_GPR_Regs) {
unsigned VReg = RegInfo.createVirtualRegister(&PPC::GPRCRegClass);
RegInfo.addLiveIn(GPR[GPR_idx], VReg);
SDOperand Val = DAG.getCopyFromReg(Root, VReg, PtrVT);
SDOperand Store = DAG.getTruncStore(Val.getValue(1), Val, FIN,
NULL, 0, ObjSize==1 ? MVT::i8 : MVT::i16 );
MemOps.push_back(Store);
++GPR_idx;
if (isMachoABI) ArgOffset += PtrByteSize;
} else {
ArgOffset += PtrByteSize;
}
continue;
}
for (unsigned j = 0; j < ArgSize; j += PtrByteSize) {
// Store whatever pieces of the object are in registers
// to memory. ArgVal will be address of the beginning of
@ -1678,7 +1698,7 @@ SDOperand PPCTargetLowering::LowerCALL(SDOperand Op, SelectionDAG &DAG,
if (Flags & ISD::ParamFlags::ByVal)
ArgSize = (Flags & ISD::ParamFlags::ByValSize) >>
ISD::ParamFlags::ByValSizeOffs;
ArgSize = std::max(ArgSize, PtrByteSize);
ArgSize = ((ArgSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
NumBytes += ArgSize;
}