//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "function-lowering-info"
-#include "FunctionLoweringInfo.h"
+#include "llvm/CodeGen/FunctionLoweringInfo.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/Instructions.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
+#include "llvm/Analysis/DebugInfo.h"
#include "llvm/CodeGen/Analysis.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetFrameInfo.h"
#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetIntrinsicInfo.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Support/Debug.h"
if (isa<PHINode>(I)) return true;
const BasicBlock *BB = I->getParent();
for (Value::const_use_iterator UI = I->use_begin(), E = I->use_end();
- UI != E; ++UI)
- if (cast<Instruction>(*UI)->getParent() != BB || isa<PHINode>(*UI))
+ UI != E; ++UI) {
+ const User *U = *UI;
+ if (cast<Instruction>(U)->getParent() != BB || isa<PHINode>(U))
return true;
+ }
return false;
}
const BasicBlock *Entry = A->getParent()->begin();
for (Value::const_use_iterator UI = A->use_begin(), E = A->use_end();
- UI != E; ++UI)
- if (cast<Instruction>(*UI)->getParent() != Entry || isa<SwitchInst>(*UI))
+ UI != E; ++UI) {
+ const User *U = *UI;
+ if (cast<Instruction>(U)->getParent() != Entry || isa<SwitchInst>(U))
return false; // Use not in entry block.
+ }
return true;
}
: TLI(tli) {
}
-void FunctionLoweringInfo::set(const Function &fn, MachineFunction &mf,
- bool EnableFastISel) {
+void FunctionLoweringInfo::set(const Function &fn, MachineFunction &mf) {
Fn = &fn;
MF = &mf;
RegInfo = &MF->getRegInfo();
+ // Check whether the function can return without sret-demotion.
+ SmallVector<ISD::OutputArg, 4> Outs;
+ GetReturnInfo(Fn->getReturnType(),
+ Fn->getAttributes().getRetAttributes(), Outs, TLI);
+ CanLowerReturn = TLI.CanLowerReturn(Fn->getCallingConv(), Fn->isVarArg(),
+ Outs, Fn->getContext());
+
// Create a vreg for each argument register that is not dead and is used
// outside of the entry block for the function.
for (Function::const_arg_iterator AI = Fn->arg_begin(), E = Fn->arg_end();
TySize *= CUI->getZExtValue(); // Get total allocated size.
if (TySize == 0) TySize = 1; // Don't create zero-sized stack objects.
+
+ // The object may need to be placed onto the stack near the stack
+ // protector if one exists. Determine here if this object is a suitable
+ // candidate. I.e., it would trigger the creation of a stack protector.
+ bool MayNeedSP =
+ (AI->isArrayAllocation() ||
+ (TySize > 8 && isa<ArrayType>(Ty) &&
+ cast<ArrayType>(Ty)->getElementType()->isIntegerTy(8)));
StaticAllocaMap[AI] =
- MF->getFrameInfo()->CreateStackObject(TySize, Align, false);
+ MF->getFrameInfo()->CreateStackObject(TySize, Align, false, MayNeedSP);
}
for (; BB != EB; ++BB)
- for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I)
+ for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I) {
+ // Mark values used outside their block as exported, by allocating
+ // a virtual register for them.
if (isUsedOutsideOfDefiningBlock(I))
if (!isa<AllocaInst>(I) ||
!StaticAllocaMap.count(cast<AllocaInst>(I)))
InitializeRegForValue(I);
+ // Collect llvm.dbg.declare information. This is done now instead of
+ // during the initial isel pass through the IR so that it is done
+ // in a predictable order.
+ if (const DbgDeclareInst *DI = dyn_cast<DbgDeclareInst>(I)) {
+ MachineModuleInfo &MMI = MF->getMMI();
+ if (MMI.hasDebugInfo() &&
+ DIVariable(DI->getVariable()).Verify() &&
+ !DI->getDebugLoc().isUnknown()) {
+ // Don't handle byval struct arguments or VLAs, for example.
+ // Non-byval arguments are handled here (they refer to the stack
+ // temporary alloca at this point).
+ const Value *Address = DI->getAddress();
+ if (Address) {
+ if (const BitCastInst *BCI = dyn_cast<BitCastInst>(Address))
+ Address = BCI->getOperand(0);
+ if (const AllocaInst *AI = dyn_cast<AllocaInst>(Address)) {
+ DenseMap<const AllocaInst *, int>::iterator SI =
+ StaticAllocaMap.find(AI);
+ if (SI != StaticAllocaMap.end()) { // Check for VLAs.
+ int FI = SI->second;
+ MMI.setVariableDbgInfo(DI->getVariable(),
+ FI, DI->getDebugLoc());
+ }
+ }
+ }
+ }
+ }
+ }
+
// Create an initial MachineBasicBlock for each LLVM BasicBlock in F. This
// also creates the initial PHI MachineInstrs, though none of the input
// operands are populated.
#endif
LiveOutRegInfo.clear();
ArgDbgValues.clear();
+ ByValArgFrameIndexMap.clear();
+ RegFixups.clear();
}
-unsigned FunctionLoweringInfo::MakeReg(EVT VT) {
+/// CreateReg - Allocate a single virtual register for the given type.
+unsigned FunctionLoweringInfo::CreateReg(EVT VT) {
return RegInfo->createVirtualRegister(TLI.getRegClassFor(VT));
}
-/// CreateRegForValue - Allocate the appropriate number of virtual registers of
+/// CreateRegs - Allocate the appropriate number of virtual registers of
/// the correctly promoted or expanded types. Assign these registers
/// consecutive vreg numbers and return the first assigned number.
///
/// In the case that the given value has struct or array type, this function
/// will assign registers for each member or element.
///
-unsigned FunctionLoweringInfo::CreateRegForValue(const Value *V) {
+unsigned FunctionLoweringInfo::CreateRegs(const Type *Ty) {
SmallVector<EVT, 4> ValueVTs;
- ComputeValueVTs(TLI, V->getType(), ValueVTs);
+ ComputeValueVTs(TLI, Ty, ValueVTs);
unsigned FirstReg = 0;
for (unsigned Value = 0, e = ValueVTs.size(); Value != e; ++Value) {
EVT ValueVT = ValueVTs[Value];
- EVT RegisterVT = TLI.getRegisterType(V->getContext(), ValueVT);
+ EVT RegisterVT = TLI.getRegisterType(Ty->getContext(), ValueVT);
- unsigned NumRegs = TLI.getNumRegisters(V->getContext(), ValueVT);
+ unsigned NumRegs = TLI.getNumRegisters(Ty->getContext(), ValueVT);
for (unsigned i = 0; i != NumRegs; ++i) {
- unsigned R = MakeReg(RegisterVT);
+ unsigned R = CreateReg(RegisterVT);
if (!FirstReg) FirstReg = R;
}
}
return FirstReg;
}
+/// setByValArgumentFrameIndex - Record frame index for the byval
+/// argument. This overrides previous frame index entry for this argument,
+/// if any.
+void FunctionLoweringInfo::setByValArgumentFrameIndex(const Argument *A,
+ int FI) {
+ assert (A->hasByValAttr() && "Argument does not have byval attribute!");
+ ByValArgFrameIndexMap[A] = FI;
+}
+
+/// getByValArgumentFrameIndex - Get frame index for the byval argument.
+/// If the argument does not have any assigned frame index then 0 is
+/// returned.
+int FunctionLoweringInfo::getByValArgumentFrameIndex(const Argument *A) {
+ assert (A->hasByValAttr() && "Argument does not have byval attribute!");
+ DenseMap<const Argument *, int>::iterator I =
+ ByValArgFrameIndexMap.find(A);
+ if (I != ByValArgFrameIndexMap.end())
+ return I->second;
+ DEBUG(dbgs() << "Argument does not have assigned frame index!");
+ return 0;
+}
+
/// AddCatchInfo - Extract the personality and type infos from an eh.selector
/// call, and add them to the specified machine basic block.
void llvm::AddCatchInfo(const CallInst &I, MachineModuleInfo *MMI,
MachineBasicBlock *MBB) {
// Inform the MachineModuleInfo of the personality for this landing pad.
- const ConstantExpr *CE = cast<ConstantExpr>(I.getOperand(2));
+ const ConstantExpr *CE = cast<ConstantExpr>(I.getArgOperand(1));
assert(CE->getOpcode() == Instruction::BitCast &&
isa<Function>(CE->getOperand(0)) &&
"Personality should be a function");
// Gather all the type infos for this landing pad and pass them along to
// MachineModuleInfo.
std::vector<const GlobalVariable *> TyInfo;
- unsigned N = I.getNumOperands();
+ unsigned N = I.getNumArgOperands();
- for (unsigned i = N - 1; i > 2; --i) {
- if (const ConstantInt *CI = dyn_cast<ConstantInt>(I.getOperand(i))) {
+ for (unsigned i = N - 1; i > 1; --i) {
+ if (const ConstantInt *CI = dyn_cast<ConstantInt>(I.getArgOperand(i))) {
unsigned FilterLength = CI->getZExtValue();
unsigned FirstCatch = i + FilterLength + !FilterLength;
- assert (FirstCatch <= N && "Invalid filter length");
+ assert(FirstCatch <= N && "Invalid filter length");
if (FirstCatch < N) {
TyInfo.reserve(N - FirstCatch);
for (unsigned j = FirstCatch; j < N; ++j)
- TyInfo.push_back(ExtractTypeInfo(I.getOperand(j)));
+ TyInfo.push_back(ExtractTypeInfo(I.getArgOperand(j)));
MMI->addCatchTypeInfo(MBB, TyInfo);
TyInfo.clear();
}
// Filter.
TyInfo.reserve(FilterLength - 1);
for (unsigned j = i + 1; j < FirstCatch; ++j)
- TyInfo.push_back(ExtractTypeInfo(I.getOperand(j)));
+ TyInfo.push_back(ExtractTypeInfo(I.getArgOperand(j)));
MMI->addFilterTypeInfo(MBB, TyInfo);
TyInfo.clear();
}
}
}
- if (N > 3) {
- TyInfo.reserve(N - 3);
- for (unsigned j = 3; j < N; ++j)
- TyInfo.push_back(ExtractTypeInfo(I.getOperand(j)));
+ if (N > 2) {
+ TyInfo.reserve(N - 2);
+ for (unsigned j = 2; j < N; ++j)
+ TyInfo.push_back(ExtractTypeInfo(I.getArgOperand(j)));
MMI->addCatchTypeInfo(MBB, TyInfo);
}
}
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