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Function temporaries can not overlap with retval or args.See the comment in source code to know the reason. Anything having .auto. in its name is local to a function in nature irrespective of the linkage specified. print static local variables in module level IDATA section.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64199 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjiv Gupta 2009-02-10 04:20:26 +00:00
parent a0eedac226
commit 2cc753170b
1 changed files with 20 additions and 8 deletions
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28
lib/Target/PIC16/PIC16AsmPrinter.cpp
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@ -212,15 +212,19 @@ void PIC16AsmPrinter::EmitExternsAndGlobals (Module &M) {
// Emit declarations for external globals.
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; I++) {
// Any variables reaching here with ".auto." in its name is a local scope
// variable and should not be printed in global data section.
std::string Name = Mang->getValueName(I);
if (Name.find(".auto.") != std::string::npos)
continue;
if (I->isDeclaration())
O << "\textern "<< Name << "\n";
else if (I->getLinkage() == GlobalValue::CommonLinkage)
O << "\tglobal "<< Name << "\n";
else if (I->getLinkage() == GlobalValue::ExternalLinkage)
else if (I->hasCommonLinkage() || I->hasExternalLinkage())
O << "\tglobal "<< Name << "\n";
}
}
void PIC16AsmPrinter::EmitInitData (Module &M) {
SwitchToSection(TAI->getDataSection());
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
@ -240,7 +244,7 @@ void PIC16AsmPrinter::EmitInitData (Module &M) {
// Any variables reaching here with "." in its name is a local scope
// variable and should not be printed in global data section.
std::string name = Mang->getValueName(I);
if (name.find(".") != std::string::npos)
if (name.find(".auto.") != std::string::npos)
continue;
O << name;
@ -352,9 +356,12 @@ void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) {
// The variables of a function are of form FuncName.* . If this variable
// does not belong to this function then continue.
if (!(VarName.find(FuncName + ".") == 0 ? true : false))
// Static local varilabes of a function does not have .auto. in their
// name. They are not printed as part of function data but module
// level global data.
if (!(VarName.find(FuncName + ".auto.") == 0 ? true : false))
continue;
Constant *C = I->getInitializer();
const Type *Ty = C->getType();
unsigned Size = TD->getTypePaddedSize(Ty);
@ -362,9 +369,14 @@ void PIC16AsmPrinter::emitFunctionData(MachineFunction &MF) {
// Emit memory reserve directive.
O << VarName << " RES " << Size << "\n";
}
emitFunctionTempData(MF, FrameSize);
// Return value can not overlap with temp data, becasue a temp slot
// may be read/written after a return value is calculated and saved
// within the function.
if (RetSize > FrameSize)
O << CurrentFnName << ".dummy" << "RES" << (RetSize - FrameSize);
O << CurrentFnName << ".dummy" << " RES " << (RetSize - FrameSize) << "\n";
emitFunctionTempData(MF, FrameSize);
}
void PIC16AsmPrinter::emitFunctionTempData(MachineFunction &MF,