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Keep track of references to mem(cpy,move,set) and then print only one extern

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declaration for them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77578 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjiv Gupta 2009-07-30 04:15:15 +00:00
parent 0165a2ca89
commit e409f0a779
2 changed files with 41 additions and 2 deletions
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14
lib/Target/PIC16/PIC16.h
View File

@ -255,6 +255,20 @@ namespace PIC16CC {
return false;
}
// FIXME: currently we track both @memcpy and memcpy, as
// the first one is generated by clang, and the second one by codegen
// while lowering intrinsics. One we fix codegen to use RTLIB, we can
// have only @memcpy here.
inline static bool isMemIntrinsic (const std::string &Name) {
if (Name.compare("@memcpy") == 0 || Name.compare("memcpy") == 0 ||
Name.compare("@memset") == 0 || Name.compare("memset") == 0 ||
Name.compare("@memmove") == 0 || Name.compare("memmove") == 0) {
return true;
}
return false;
}
inline static bool isLocalToFunc (std::string &Func, std::string &Var) {
if (! isLocalName(Var)) return false;

29
lib/Target/PIC16/PIC16AsmPrinter.cpp
View File

@ -137,7 +137,15 @@ void PIC16AsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
return;
case MachineOperand::MO_GlobalAddress: {
O << Mang->getMangledName(MO.getGlobal());
std::string Sname = Mang->getMangledName(MO.getGlobal());
// FIXME: currently we do not have a memcpy def coming in the module
// by any chance, as we do not link in those as .bc lib. So these calls
// are always external and it is safe to emit an extern.
if (PAN::isMemIntrinsic(Sname)) {
LibcallDecls.push_back(createESName(Sname));
}
O << Sname;
break;
}
case MachineOperand::MO_ExternalSymbol: {
@ -148,7 +156,14 @@ void PIC16AsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
LibcallDecls.push_back(Sname);
}
O << Sname;
// Record a call to intrinsic to print the extern declaration for it.
std::string Sym = Sname;
if (PAN::isMemIntrinsic(Sym)) {
Sym = PAN::addPrefix(Sym);
LibcallDecls.push_back(createESName(Sym));
}
O << Sym;
break;
}
case MachineOperand::MO_MachineBasicBlock:
@ -253,6 +268,16 @@ void PIC16AsmPrinter::EmitFunctionDecls(Module &M) {
if (!I->isDeclaration() && !I->hasExternalLinkage())
continue;
// Do not emit memcpy, memset, and memmove here.
// Calls to these routines can be generated in two ways,
// 1. User calling the standard lib function
// 2. Codegen generating these calls for llvm intrinsics.
// In the first case a prototype is alread availale, while in
// second case the call is via and externalsym and the prototype is missing.
// So declarations for these are currently always getting printing by
// tracking both kind of references in printInstrunction.
if (I->isDeclaration() && PAN::isMemIntrinsic(Name)) continue;
const char *directive = I->isDeclaration() ? TAI->getExternDirective() :
TAI->getGlobalDirective();