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CodeGen-Windows: Only emit _fltused if a VarArg function is called with floating point args.

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This should be the minimum set of functions that could possibly need it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116978 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer 2010-10-21 00:08:21 +00:00
parent 2d8f6fe610
commit dd0a00a6e3
4 changed files with 14 additions and 15 deletions
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15
include/llvm/CodeGen/MachineModuleInfo.h
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@ -157,10 +157,9 @@ class MachineModuleInfo : public ImmutablePass {
/// in this module.
bool DbgInfoAvailable;
/// True if this module calls an external function with floating point
/// arguments. This is used to emit an undefined reference to fltused on
/// Windows targets.
bool CallsExternalFunctionWithFloatingPointArguments;
/// True if this module calls VarArg function with floating point arguments.
/// This is used to emit an undefined reference to fltused on Windows targets.
bool CallsExternalVAFunctionWithFloatingPointArguments;
public:
static char ID; // Pass identification, replacement for typeid
@ -217,12 +216,12 @@ public:
bool callsUnwindInit() const { return CallsUnwindInit; }
void setCallsUnwindInit(bool b) { CallsUnwindInit = b; }
bool callsExternalFunctionWithFloatingPointArguments() const {
return CallsExternalFunctionWithFloatingPointArguments;
bool callsExternalVAFunctionWithFloatingPointArguments() const {
return CallsExternalVAFunctionWithFloatingPointArguments;
}
void setCallsExternalFunctionWithFloatingPointArguments(bool b) {
CallsExternalFunctionWithFloatingPointArguments = b;
void setCallsExternalVAFunctionWithFloatingPointArguments(bool b) {
CallsExternalVAFunctionWithFloatingPointArguments = b;
}
/// getFrameMoves - Returns a reference to a list of moves done in the current

2
lib/CodeGen/MachineModuleInfo.cpp
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@ -257,7 +257,7 @@ MachineModuleInfo::MachineModuleInfo(const MCAsmInfo &MAI)
: ImmutablePass(ID), Context(MAI),
ObjFileMMI(0),
CurCallSite(0), CallsEHReturn(0), CallsUnwindInit(0), DbgInfoAvailable(false),
CallsExternalFunctionWithFloatingPointArguments(false) {
CallsExternalVAFunctionWithFloatingPointArguments(false) {
initializeMachineModuleInfoPass(*PassRegistry::getPassRegistry());
// Always emit some info, by default "no personality" info.
Personalities.push_back(NULL);

10
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -5030,16 +5030,16 @@ void SelectionDAGBuilder::visitCall(const CallInst &I) {
// See if any floating point values are being passed to this external
// function. This is used to emit an undefined reference to fltused on
// Windows.
if (!F->hasLocalLinkage() && F->hasName()) {
MachineModuleInfo &MMI = DAG.getMachineFunction().getMMI();
for (unsigned i = 0, e = I.getNumArgOperands(); i != e &&
!MMI.callsExternalFunctionWithFloatingPointArguments(); ++i) {
MachineModuleInfo &MMI = DAG.getMachineFunction().getMMI();
if (F->isVarArg() &&
!MMI.callsExternalVAFunctionWithFloatingPointArguments()) {
for (unsigned i = 0, e = I.getNumArgOperands(); i != e; ++i) {
const Type* T = I.getArgOperand(i)->getType();
for (po_iterator<const Type*> i = po_begin(T),
e = po_end(T);
i != e; ++i) {
if (i->isFloatingPointTy()) {
MMI.setCallsExternalFunctionWithFloatingPointArguments(true);
MMI.setCallsExternalVAFunctionWithFloatingPointArguments(true);
break;
}
}

2
lib/Target/X86/X86AsmPrinter.cpp
View File

@ -582,7 +582,7 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
if (Subtarget->isTargetWindows()
&& !Subtarget->isTargetCygMing()
&& MMI->callsExternalFunctionWithFloatingPointArguments()) {
&& MMI->callsExternalVAFunctionWithFloatingPointArguments()) {
MCSymbol *S = MMI->getContext().GetOrCreateSymbol(StringRef("__fltused"));
OutStreamer.EmitSymbolAttribute(S, MCSA_Global);
}