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On 64-bit PowerPC, pointers are 8 bytes, so parameter area offset is 48, not 24 

llvm-svn: 15928
This commit is contained in:
Misha Brukman 2004-08-19 21:34:05 +00:00
parent b32e350931
commit f35b35a926
1 changed files with 10 additions and 7 deletions
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17
llvm/lib/Target/PowerPC/PPC64ISelSimple.cpp
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@ -93,8 +93,11 @@ namespace {
// FrameIndex for the alloca. // FrameIndex for the alloca.
std::map<AllocaInst*, unsigned> AllocaMap; std::map<AllocaInst*, unsigned> AllocaMap;
// Target configuration data
const unsigned ParameterSaveAreaOffset;
ISel(TargetMachine &tm) : TM(reinterpret_cast<PPC64TargetMachine&>(tm)), ISel(TargetMachine &tm) : TM(reinterpret_cast<PPC64TargetMachine&>(tm)),
F(0), BB(0) {} F(0), BB(0), ParameterSaveAreaOffset(24) {}
bool doInitialization(Module &M) { bool doInitialization(Module &M) {
// Add external functions that we may call // Add external functions that we may call
@ -585,7 +588,7 @@ void ISel::copyConstantToRegister(MachineBasicBlock *MBB,
/// LoadArgumentsToVirtualRegs - Load all of the arguments to this function from /// LoadArgumentsToVirtualRegs - Load all of the arguments to this function from
/// the stack into virtual registers. /// the stack into virtual registers.
void ISel::LoadArgumentsToVirtualRegs(Function &Fn) { void ISel::LoadArgumentsToVirtualRegs(Function &Fn) {
unsigned ArgOffset = 24; unsigned ArgOffset = ParameterSaveAreaOffset;
unsigned GPR_remaining = 8; unsigned GPR_remaining = 8;
unsigned FPR_remaining = 13; unsigned FPR_remaining = 13;
unsigned GPR_idx = 0, FPR_idx = 0; unsigned GPR_idx = 0, FPR_idx = 0;
@ -1269,8 +1272,8 @@ void ISel::doCall(const ValueRecord &Ret, MachineInstr *CallMI,
const std::vector<ValueRecord> &Args, bool isVarArg) { const std::vector<ValueRecord> &Args, bool isVarArg) {
// Count how many bytes are to be pushed on the stack, including the linkage // Count how many bytes are to be pushed on the stack, including the linkage
// area, and parameter passing area. // area, and parameter passing area.
unsigned NumBytes = 24; unsigned NumBytes = ParameterSaveAreaOffset;
unsigned ArgOffset = 24; unsigned ArgOffset = ParameterSaveAreaOffset;
if (!Args.empty()) { if (!Args.empty()) {
for (unsigned i = 0, e = Args.size(); i != e; ++i) for (unsigned i = 0, e = Args.size(); i != e; ++i)
@ -1287,16 +1290,16 @@ void ISel::doCall(const ValueRecord &Ret, MachineInstr *CallMI,
default: assert(0 && "Unknown class!"); default: assert(0 && "Unknown class!");
} }
// Just to be safe, we'll always reserve the full 32 bytes worth of // Just to be safe, we'll always reserve the full 64 bytes worth of
// argument passing space in case any called code gets funky on us. // argument passing space in case any called code gets funky on us.
if (NumBytes < 24 + 32) NumBytes = 24 + 32; if (NumBytes < ParameterSaveAreaOffset + 64)
NumBytes = ParameterSaveAreaOffset + 64;
// Adjust the stack pointer for the new arguments... // Adjust the stack pointer for the new arguments...
// These functions are automatically eliminated by the prolog/epilog pass // These functions are automatically eliminated by the prolog/epilog pass
BuildMI(BB, PPC::ADJCALLSTACKDOWN, 1).addImm(NumBytes); BuildMI(BB, PPC::ADJCALLSTACKDOWN, 1).addImm(NumBytes);
// Arguments go on the stack in reverse order, as specified by the ABI. // Arguments go on the stack in reverse order, as specified by the ABI.
// Offset to the paramater area on the stack is 24.
int GPR_remaining = 8, FPR_remaining = 13; int GPR_remaining = 8, FPR_remaining = 13;
unsigned GPR_idx = 0, FPR_idx = 0; unsigned GPR_idx = 0, FPR_idx = 0;
static const unsigned GPR[] = { static const unsigned GPR[] = {