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Swift Calling Convention: swifterror target support.

Browse Source 
Differential Revision: http://reviews.llvm.org/D18716

llvm-svn: 265997
This commit is contained in:
Manman Ren 2016-04-11 21:08:06 +00:00
parent e345ecd143
commit e6636caf43
17 changed files with 1344 additions and 7 deletions
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8
lib/Target/AArch64/AArch64CallingConvention.td
View File

@ -86,6 +86,8 @@ def RetCC_AArch64_AAPCS : CallingConv<[
CCIfType<[v2f32], CCBitConvertToType<v2i32>>,
CCIfType<[v2f64, v4f32], CCBitConvertToType<v2i64>>,
CCIfSwiftError<CCIfType<[i64], CCAssignToRegWithShadow<[X19], [W19]>>>,
// Big endian vectors must be passed as if they were 1-element vectors so that
// their lanes are in a consistent order.
CCIfBigEndian<CCIfType<[v2i32, v2f32, v4i16, v4f16, v8i8],
@ -129,6 +131,9 @@ def CC_AArch64_DarwinPCS : CallingConv<[
// A SwiftSelf is passed in X9.
CCIfSwiftSelf<CCIfType<[i64], CCAssignToRegWithShadow<[X9], [W9]>>>,
// A SwiftError is passed in X19.
CCIfSwiftError<CCIfType<[i64], CCAssignToRegWithShadow<[X19], [W19]>>>,
CCIfConsecutiveRegs<CCCustom<"CC_AArch64_Custom_Block">>,
// Handle i1, i8, i16, i32, i64, f32, f64 and v2f64 by passing in registers,
@ -273,6 +278,9 @@ def CSR_AArch64_AAPCS : CalleeSavedRegs<(add LR, FP, X19, X20, X21, X22,
// case)
def CSR_AArch64_AAPCS_ThisReturn : CalleeSavedRegs<(add CSR_AArch64_AAPCS, X0)>;
def CSR_AArch64_AAPCS_SwiftError
: CalleeSavedRegs<(sub CSR_AArch64_AAPCS, X19)>;
// The function used by Darwin to obtain the address of a thread-local variable
// guarantees more than a normal AAPCS function. x16 and x17 are used on the
// fast path for calculation, but other registers except X0 (argument/return)

37
lib/Target/AArch64/AArch64FastISel.cpp
View File

@ -1900,6 +1900,21 @@ bool AArch64FastISel::selectLoad(const Instruction *I) {
cast<LoadInst>(I)->isAtomic())
return false;
const Value *SV = I->getOperand(0);
if (TLI.supportSwiftError()) {
// Swifterror values can come from either a function parameter with
// swifterror attribute or an alloca with swifterror attribute.
if (const Argument *Arg = dyn_cast<Argument>(SV)) {
if (Arg->hasSwiftErrorAttr())
return false;
}
if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(SV)) {
if (Alloca->isSwiftError())
return false;
}
}
// See if we can handle this address.
Address Addr;
if (!computeAddress(I->getOperand(0), Addr, I->getType()))
@ -2064,6 +2079,21 @@ bool AArch64FastISel::selectStore(const Instruction *I) {
cast<StoreInst>(I)->isAtomic())
return false;
const Value *PtrV = I->getOperand(1);
if (TLI.supportSwiftError()) {
// Swifterror values can come from either a function parameter with
// swifterror attribute or an alloca with swifterror attribute.
if (const Argument *Arg = dyn_cast<Argument>(PtrV)) {
if (Arg->hasSwiftErrorAttr())
return false;
}
if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(PtrV)) {
if (Alloca->isSwiftError())
return false;
}
}
// Get the value to be stored into a register. Use the zero register directly
// when possible to avoid an unnecessary copy and a wasted register.
unsigned SrcReg = 0;
@ -2810,6 +2840,7 @@ bool AArch64FastISel::fastLowerArguments() {
F->getAttributes().hasAttribute(Idx, Attribute::InReg) ||
F->getAttributes().hasAttribute(Idx, Attribute::StructRet) ||
F->getAttributes().hasAttribute(Idx, Attribute::SwiftSelf) ||
F->getAttributes().hasAttribute(Idx, Attribute::SwiftError) ||
F->getAttributes().hasAttribute(Idx, Attribute::Nest))
return false;
@ -3062,7 +3093,7 @@ bool AArch64FastISel::fastLowerCall(CallLoweringInfo &CLI) {
for (auto Flag : CLI.OutFlags)
if (Flag.isInReg() || Flag.isSRet() || Flag.isNest() || Flag.isByVal() ||
Flag.isSwiftSelf())
Flag.isSwiftSelf() || Flag.isSwiftError())
return false;
// Set up the argument vectors.
@ -3644,6 +3675,10 @@ bool AArch64FastISel::selectRet(const Instruction *I) {
if (F.isVarArg())
return false;
if (TLI.supportSwiftError() &&
F.getAttributes().hasAttrSomewhere(Attribute::SwiftError))
return false;
if (TLI.supportSplitCSR(FuncInfo.MF))
return false;

18
lib/Target/AArch64/AArch64FrameLowering.cpp
View File

@ -706,6 +706,15 @@ static unsigned getPrologueDeath(MachineFunction &MF, unsigned Reg) {
return getKillRegState(LRKill);
}
static bool produceCompactUnwindFrame(MachineFunction &MF) {
const AArch64Subtarget &Subtarget = MF.getSubtarget<AArch64Subtarget>();
AttributeSet Attrs = MF.getFunction()->getAttributes();
return Subtarget.isTargetMachO() &&
!(Subtarget.getTargetLowering()->supportSwiftError() &&
Attrs.hasAttrSomewhere(Attribute::SwiftError));
}
struct RegPairInfo {
RegPairInfo() : Reg1(AArch64::NoRegister), Reg2(AArch64::NoRegister) {}
unsigned Reg1;
@ -730,7 +739,7 @@ static void computeCalleeSaveRegisterPairs(
(void)CC;
// MachO's compact unwind format relies on all registers being stored in
// pairs.
assert((!MF.getSubtarget<AArch64Subtarget>().isTargetMachO() ||
assert((!produceCompactUnwindFrame(MF) ||
CC == CallingConv::PreserveMost ||
(Count & 1) == 0) &&
"Odd number of callee-saved regs to spill!");
@ -764,7 +773,7 @@ static void computeCalleeSaveRegisterPairs(
// MachO's compact unwind format relies on all registers being stored in
// adjacent register pairs.
assert((!MF.getSubtarget<AArch64Subtarget>().isTargetMachO() ||
assert((!produceCompactUnwindFrame(MF) ||
CC == CallingConv::PreserveMost ||
(RPI.isPaired() &&
((RPI.Reg1 == AArch64::LR && RPI.Reg2 == AArch64::FP) ||
@ -954,7 +963,6 @@ void AArch64FrameLowering::determineCalleeSaves(MachineFunction &MF,
const AArch64RegisterInfo *RegInfo = static_cast<const AArch64RegisterInfo *>(
MF.getSubtarget().getRegisterInfo());
AArch64FunctionInfo *AFI = MF.getInfo<AArch64FunctionInfo>();
const AArch64Subtarget &Subtarget = MF.getSubtarget<AArch64Subtarget>();
unsigned UnspilledCSGPR = AArch64::NoRegister;
unsigned UnspilledCSGPRPaired = AArch64::NoRegister;
@ -992,7 +1000,7 @@ void AArch64FrameLowering::determineCalleeSaves(MachineFunction &MF,
// MachO's compact unwind format relies on all registers being stored in
// pairs.
// FIXME: the usual format is actually better if unwinding isn't needed.
if (Subtarget.isTargetMachO() && !SavedRegs.test(PairedReg)) {
if (produceCompactUnwindFrame(MF) && !SavedRegs.test(PairedReg)) {
SavedRegs.set(PairedReg);
ExtraCSSpill = true;
}
@ -1035,7 +1043,7 @@ void AArch64FrameLowering::determineCalleeSaves(MachineFunction &MF,
// MachO's compact unwind format relies on all registers being stored in
// pairs, so if we need to spill one extra for BigStack, then we need to
// store the pair.
if (Subtarget.isTargetMachO())
if (produceCompactUnwindFrame(MF))
SavedRegs.set(UnspilledCSGPRPaired);
ExtraCSSpill = true;
NumRegsSpilled = SavedRegs.count();

4
lib/Target/AArch64/AArch64ISelLowering.h
View File

@ -400,6 +400,10 @@ public:
MachineBasicBlock *Entry,
const SmallVectorImpl<MachineBasicBlock *> &Exits) const override;
bool supportSwiftError() const override {
return true;
}
private:
bool isExtFreeImpl(const Instruction *Ext) const override;

9
lib/Target/AArch64/AArch64RegisterInfo.cpp
View File

@ -51,6 +51,11 @@ AArch64RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
return MF->getInfo<AArch64FunctionInfo>()->isSplitCSR() ?
CSR_AArch64_CXX_TLS_Darwin_PE_SaveList :
CSR_AArch64_CXX_TLS_Darwin_SaveList;
if (MF->getSubtarget<AArch64Subtarget>().getTargetLowering()
->supportSwiftError() &&
MF->getFunction()->getAttributes().hasAttrSomewhere(
Attribute::SwiftError))
return CSR_AArch64_AAPCS_SwiftError_SaveList;
if (MF->getFunction()->getCallingConv() == CallingConv::PreserveMost)
return CSR_AArch64_RT_MostRegs_SaveList;
else
@ -76,6 +81,10 @@ AArch64RegisterInfo::getCallPreservedMask(const MachineFunction &MF,
return CSR_AArch64_AllRegs_RegMask;
if (CC == CallingConv::CXX_FAST_TLS)
return CSR_AArch64_CXX_TLS_Darwin_RegMask;
if (MF.getSubtarget<AArch64Subtarget>().getTargetLowering()
->supportSwiftError() &&
MF.getFunction()->getAttributes().hasAttrSomewhere(Attribute::SwiftError))
return CSR_AArch64_AAPCS_SwiftError_RegMask;
if (CC == CallingConv::PreserveMost)
return CSR_AArch64_RT_MostRegs_RegMask;
else

9
lib/Target/ARM/ARMBaseRegisterInfo.cpp
View File

@ -87,6 +87,10 @@ ARMBaseRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
}
}
if (STI.isTargetDarwin() && STI.getTargetLowering()->supportSwiftError() &&
F->getAttributes().hasAttrSomewhere(Attribute::SwiftError))
return CSR_iOS_SwiftError_SaveList;
if (STI.isTargetDarwin() && F->getCallingConv() == CallingConv::CXX_FAST_TLS)
return MF->getInfo<ARMFunctionInfo>()->isSplitCSR()
? CSR_iOS_CXX_TLS_PE_SaveList
@ -110,6 +114,11 @@ ARMBaseRegisterInfo::getCallPreservedMask(const MachineFunction &MF,
if (CC == CallingConv::GHC)
// This is academic becase all GHC calls are (supposed to be) tail calls
return CSR_NoRegs_RegMask;
if (STI.isTargetDarwin() && STI.getTargetLowering()->supportSwiftError() &&
MF.getFunction()->getAttributes().hasAttrSomewhere(Attribute::SwiftError))
return CSR_iOS_SwiftError_RegMask;
if (STI.isTargetDarwin() && CC == CallingConv::CXX_FAST_TLS)
return CSR_iOS_CXX_TLS_RegMask;
return STI.isTargetDarwin() ? CSR_iOS_RegMask : CSR_AAPCS_RegMask;

21
lib/Target/ARM/ARMCallingConv.td
View File

@ -26,6 +26,9 @@ def CC_ARM_APCS : CallingConv<[
// A SwiftSelf is passed in R9.
CCIfSwiftSelf<CCIfType<[i32], CCAssignToReg<[R9]>>>,
// A SwiftError is passed in R6.
CCIfSwiftError<CCIfType<[i32], CCAssignToReg<[R6]>>>,
// Handle all vector types as either f64 or v2f64.
CCIfType<[v1i64, v2i32, v4i16, v8i8, v2f32], CCBitConvertToType<f64>>,
CCIfType<[v2i64, v4i32, v8i16, v16i8, v4f32], CCBitConvertToType<v2f64>>,
@ -45,6 +48,9 @@ def RetCC_ARM_APCS : CallingConv<[
CCIfType<[i1, i8, i16], CCPromoteToType<i32>>,
CCIfType<[f32], CCBitConvertToType<i32>>,
// A SwiftError is returned in R6.
CCIfSwiftError<CCIfType<[i32], CCAssignToReg<[R6]>>>,
// Handle all vector types as either f64 or v2f64.
CCIfType<[v1i64, v2i32, v4i16, v8i8, v2f32], CCBitConvertToType<f64>>,
CCIfType<[v2i64, v4i32, v8i16, v16i8, v4f32], CCBitConvertToType<v2f64>>,
@ -157,6 +163,9 @@ def CC_ARM_AAPCS : CallingConv<[
// A SwiftSelf is passed in R9.
CCIfSwiftSelf<CCIfType<[i32], CCAssignToReg<[R9]>>>,
// A SwiftError is passed in R6.
CCIfSwiftError<CCIfType<[i32], CCAssignToReg<[R6]>>>,
CCIfType<[f64, v2f64], CCCustom<"CC_ARM_AAPCS_Custom_f64">>,
CCIfType<[f32], CCBitConvertToType<i32>>,
CCDelegateTo<CC_ARM_AAPCS_Common>
@ -167,6 +176,9 @@ def RetCC_ARM_AAPCS : CallingConv<[
CCIfType<[v1i64, v2i32, v4i16, v8i8, v2f32], CCBitConvertToType<f64>>,
CCIfType<[v2i64, v4i32, v8i16, v16i8, v4f32], CCBitConvertToType<v2f64>>,
// A SwiftError is returned in R6.
CCIfSwiftError<CCIfType<[i32], CCAssignToReg<[R6]>>>,
CCIfType<[f64, v2f64], CCCustom<"RetCC_ARM_AAPCS_Custom_f64">>,
CCIfType<[f32], CCBitConvertToType<i32>>,
CCDelegateTo<RetCC_ARM_AAPCS_Common>
@ -188,6 +200,9 @@ def CC_ARM_AAPCS_VFP : CallingConv<[
// A SwiftSelf is passed in R9.
CCIfSwiftSelf<CCIfType<[i32], CCAssignToReg<[R9]>>>,
// A SwiftError is passed in R6.
CCIfSwiftError<CCIfType<[i32], CCAssignToReg<[R6]>>>,
// HFAs are passed in a contiguous block of registers, or on the stack
CCIfConsecutiveRegs<CCCustom<"CC_ARM_AAPCS_Custom_Aggregate">>,
@ -203,6 +218,9 @@ def RetCC_ARM_AAPCS_VFP : CallingConv<[
CCIfType<[v1i64, v2i32, v4i16, v8i8, v2f32], CCBitConvertToType<f64>>,
CCIfType<[v2i64, v4i32, v8i16, v16i8, v4f32], CCBitConvertToType<v2f64>>,
// A SwiftError is returned in R6.
CCIfSwiftError<CCIfType<[i32], CCAssignToReg<[R6]>>>,
CCIfType<[v2f64], CCAssignToReg<[Q0, Q1, Q2, Q3]>>,
CCIfType<[f64], CCAssignToReg<[D0, D1, D2, D3, D4, D5, D6, D7]>>,
CCIfType<[f32], CCAssignToReg<[S0, S1, S2, S3, S4, S5, S6, S7, S8,
@ -231,6 +249,9 @@ def CSR_AAPCS_ThisReturn : CalleeSavedRegs<(add LR, R11, R10, R9, R8, R7, R6,
// Also save R7-R4 first to match the stack frame fixed spill areas.
def CSR_iOS : CalleeSavedRegs<(add LR, R7, R6, R5, R4, (sub CSR_AAPCS, R9))>;
// R6 is used to pass swifterror, remove it from CSR.
def CSR_iOS_SwiftError : CalleeSavedRegs<(sub CSR_iOS, R6)>;
def CSR_iOS_ThisReturn : CalleeSavedRegs<(add LR, R7, R6, R5, R4,
(sub CSR_AAPCS_ThisReturn, R9))>;

36
lib/Target/ARM/ARMFastISel.cpp
View File

@ -1062,6 +1062,21 @@ bool ARMFastISel::SelectLoad(const Instruction *I) {
if (cast<LoadInst>(I)->isAtomic())
return false;
const Value *SV = I->getOperand(0);
if (TLI.supportSwiftError()) {
// Swifterror values can come from either a function parameter with
// swifterror attribute or an alloca with swifterror attribute.
if (const Argument *Arg = dyn_cast<Argument>(SV)) {
if (Arg->hasSwiftErrorAttr())
return false;
}
if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(SV)) {
if (Alloca->isSwiftError())
return false;
}
}
// Verify we have a legal type before going any further.
MVT VT;
if (!isLoadTypeLegal(I->getType(), VT))
@ -1177,6 +1192,21 @@ bool ARMFastISel::SelectStore(const Instruction *I) {
if (cast<StoreInst>(I)->isAtomic())
return false;
const Value *PtrV = I->getOperand(1);
if (TLI.supportSwiftError()) {
// Swifterror values can come from either a function parameter with
// swifterror attribute or an alloca with swifterror attribute.
if (const Argument *Arg = dyn_cast<Argument>(PtrV)) {
if (Arg->hasSwiftErrorAttr())
return false;
}
if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(PtrV)) {
if (Alloca->isSwiftError())
return false;
}
}
// Verify we have a legal type before going any further.
MVT VT;
if (!isLoadTypeLegal(I->getOperand(0)->getType(), VT))
@ -2085,6 +2115,10 @@ bool ARMFastISel::SelectRet(const Instruction *I) {
if (!FuncInfo.CanLowerReturn)
return false;
if (TLI.supportSwiftError() &&
F.getAttributes().hasAttrSomewhere(Attribute::SwiftError))
return false;
if (TLI.supportSplitCSR(FuncInfo.MF))
return false;
@ -2347,6 +2381,7 @@ bool ARMFastISel::SelectCall(const Instruction *I,
if (CS.paramHasAttr(AttrInd, Attribute::InReg) ||
CS.paramHasAttr(AttrInd, Attribute::StructRet) ||
CS.paramHasAttr(AttrInd, Attribute::SwiftSelf) ||
CS.paramHasAttr(AttrInd, Attribute::SwiftError) ||
CS.paramHasAttr(AttrInd, Attribute::Nest) ||
CS.paramHasAttr(AttrInd, Attribute::ByVal))
return false;
@ -3023,6 +3058,7 @@ bool ARMFastISel::fastLowerArguments() {
if (F->getAttributes().hasAttribute(Idx, Attribute::InReg) ||
F->getAttributes().hasAttribute(Idx, Attribute::StructRet) ||
F->getAttributes().hasAttribute(Idx, Attribute::SwiftSelf) ||
F->getAttributes().hasAttribute(Idx, Attribute::SwiftError) ||
F->getAttributes().hasAttribute(Idx, Attribute::ByVal))
return false;

4
lib/Target/ARM/ARMISelLowering.h
View File

@ -470,6 +470,10 @@ namespace llvm {
bool isCheapToSpeculateCttz() const override;
bool isCheapToSpeculateCtlz() const override;
bool supportSwiftError() const override {
return true;
}
protected:
std::pair<const TargetRegisterClass *, uint8_t>
findRepresentativeClass(const TargetRegisterInfo *TRI,

8
lib/Target/X86/X86CallingConv.td
View File

@ -162,6 +162,9 @@ def RetCC_X86_64_C : CallingConv<[
// MMX vector types are always returned in XMM0.
CCIfType<[x86mmx], CCAssignToReg<[XMM0, XMM1]>>,
CCIfSwiftError<CCIfType<[i64], CCAssignToReg<[R12]>>>,
CCDelegateTo<RetCC_X86Common>
]>;
@ -297,6 +300,9 @@ def CC_X86_64_C : CallingConv<[
// A SwiftSelf is passed in R10.
CCIfSwiftSelf<CCIfType<[i64], CCAssignToReg<[R10]>>>,
// A SwiftError is passed in R12.
CCIfSwiftError<CCIfType<[i64], CCAssignToReg<[R12]>>>,
// The first 6 integer arguments are passed in integer registers.
CCIfType<[i32], CCAssignToReg<[EDI, ESI, EDX, ECX, R8D, R9D]>>,
CCIfType<[i64], CCAssignToReg<[RDI, RSI, RDX, RCX, R8 , R9 ]>>,
@ -845,6 +851,8 @@ def CSR_NoRegs : CalleeSavedRegs<(add)>;
def CSR_32 : CalleeSavedRegs<(add ESI, EDI, EBX, EBP)>;
def CSR_64 : CalleeSavedRegs<(add RBX, R12, R13, R14, R15, RBP)>;
def CSR_64_SwiftError : CalleeSavedRegs<(sub CSR_64, R12)>;
def CSR_32EHRet : CalleeSavedRegs<(add EAX, EDX, CSR_32)>;
def CSR_64EHRet : CalleeSavedRegs<(add RAX, RDX, CSR_64)>;

39
lib/Target/X86/X86FastISel.cpp
View File

@ -972,6 +972,21 @@ bool X86FastISel::X86SelectStore(const Instruction *I) {
if (S->isAtomic())
return false;
const Value *PtrV = I->getOperand(1);
if (TLI.supportSwiftError()) {
// Swifterror values can come from either a function parameter with
// swifterror attribute or an alloca with swifterror attribute.
if (const Argument *Arg = dyn_cast<Argument>(PtrV)) {
if (Arg->hasSwiftErrorAttr())
return false;
}
if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(PtrV)) {
if (Alloca->isSwiftError())
return false;
}
}
const Value *Val = S->getValueOperand();
const Value *Ptr = S->getPointerOperand();
@ -1002,6 +1017,10 @@ bool X86FastISel::X86SelectRet(const Instruction *I) {
if (!FuncInfo.CanLowerReturn)
return false;
if (TLI.supportSwiftError() &&
F.getAttributes().hasAttrSomewhere(Attribute::SwiftError))
return false;
if (TLI.supportSplitCSR(FuncInfo.MF))
return false;
@ -1133,6 +1152,21 @@ bool X86FastISel::X86SelectLoad(const Instruction *I) {
if (LI->isAtomic())
return false;
const Value *SV = I->getOperand(0);
if (TLI.supportSwiftError()) {
// Swifterror values can come from either a function parameter with
// swifterror attribute or an alloca with swifterror attribute.
if (const Argument *Arg = dyn_cast<Argument>(SV)) {
if (Arg->hasSwiftErrorAttr())
return false;
}
if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(SV)) {
if (Alloca->isSwiftError())
return false;
}
}
MVT VT;
if (!isTypeLegal(LI->getType(), VT, /*AllowI1=*/true))
return false;
@ -2745,6 +2779,7 @@ bool X86FastISel::fastLowerArguments() {
F->getAttributes().hasAttribute(Idx, Attribute::InReg) ||
F->getAttributes().hasAttribute(Idx, Attribute::StructRet) ||
F->getAttributes().hasAttribute(Idx, Attribute::SwiftSelf) ||
F->getAttributes().hasAttribute(Idx, Attribute::SwiftError) ||
F->getAttributes().hasAttribute(Idx, Attribute::Nest))
return false;
@ -2877,6 +2912,10 @@ bool X86FastISel::fastLowerCall(CallLoweringInfo &CLI) {
if (CLI.CS && CLI.CS->hasInAllocaArgument())
return false;
for (auto Flag : CLI.OutFlags)
if (Flag.isSwiftError())
return false;
// Fast-isel doesn't know about callee-pop yet.
if (X86::isCalleePop(CC, Subtarget->is64Bit(), IsVarArg,
TM.Options.GuaranteedTailCallOpt))

21
lib/Target/X86/X86ISelLowering.cpp
View File

@ -2227,7 +2227,26 @@ X86TargetLowering::LowerReturn(SDValue Chain,
// false, then an sret argument may be implicitly inserted in the SelDAG. In
// either case FuncInfo->setSRetReturnReg() will have been called.
if (unsigned SRetReg = FuncInfo->getSRetReturnReg()) {
SDValue Val = DAG.getCopyFromReg(Chain, dl, SRetReg,
// When we have both sret and another return value, we should use the
// original Chain stored in RetOps[0], instead of the current Chain updated
// in the above loop. If we only have sret, RetOps[0] equals to Chain.
// For the case of sret and another return value, we have
// Chain_0 at the function entry
// Chain_1 = getCopyToReg(Chain_0) in the above loop
// If we use Chain_1 in getCopyFromReg, we will have
// Val = getCopyFromReg(Chain_1)
// Chain_2 = getCopyToReg(Chain_1, Val) from below
// getCopyToReg(Chain_0) will be glued together with
// getCopyToReg(Chain_1, Val) into Unit A, getCopyFromReg(Chain_1) will be
// in Unit B, and we will have cyclic dependency between Unit A and Unit B:
// Data dependency from Unit B to Unit A due to usage of Val in
// getCopyToReg(Chain_1, Val)
// Chain dependency from Unit A to Unit B
// So here, we use RetOps[0] (i.e Chain_0) for getCopyFromReg.
SDValue Val = DAG.getCopyFromReg(RetOps[0], dl, SRetReg,
getPointerTy(MF.getDataLayout()));
unsigned RetValReg

4
lib/Target/X86/X86ISelLowering.h
View File

@ -984,6 +984,10 @@ namespace llvm {
bool isIntDivCheap(EVT VT, AttributeSet Attr) const override;
bool supportSwiftError() const override {
return true;
}
protected:
std::pair<const TargetRegisterClass *, uint8_t>
findRepresentativeClass(const TargetRegisterInfo *TRI,

8
lib/Target/X86/X86RegisterInfo.cpp
View File

@ -299,6 +299,10 @@ X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
return CSR_Win64_SaveList;
if (CallsEHReturn)
return CSR_64EHRet_SaveList;
if (Subtarget.getTargetLowering()->supportSwiftError() &&
MF->getFunction()->getAttributes().hasAttrSomewhere(
Attribute::SwiftError))
return CSR_64_SwiftError_SaveList;
return CSR_64_SaveList;
}
if (CallsEHReturn)
@ -385,6 +389,10 @@ X86RegisterInfo::getCallPreservedMask(const MachineFunction &MF,
if (Is64Bit) {
if (IsWin64)
return CSR_Win64_RegMask;
if (Subtarget.getTargetLowering()->supportSwiftError() &&
MF.getFunction()->getAttributes().hasAttrSomewhere(
Attribute::SwiftError))
return CSR_64_SwiftError_RegMask;
return CSR_64_RegMask;
}
return CSR_32_RegMask;

385
test/CodeGen/AArch64/swifterror.ll Normal file
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; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-apple-ios -disable-post-ra | FileCheck --check-prefix=CHECK-APPLE %s
; RUN: llc -verify-machineinstrs -O0 < %s -mtriple=aarch64-apple-ios -disable-post-ra | FileCheck --check-prefix=CHECK-O0 %s
declare i8* @malloc(i64)
declare void @free(i8*)
%swift_error = type {i64, i8}
; This tests the basic usage of a swifterror parameter. "foo" is the function
; that takes a swifterror parameter and "caller" is the caller of "foo".
define float @foo(%swift_error** swifterror %error_ptr_ref) {
; CHECK-APPLE-LABEL: foo:
; CHECK-APPLE: orr w0, wzr, #0x10
; CHECK-APPLE: malloc
; CHECK-APPLE: orr [[ID:w[0-9]+]], wzr, #0x1
; CHECK-APPLE: strb [[ID]], [x0, #8]
; CHECK-APPLE: mov x19, x0
; CHECK-APPLE-NOT: x19
; CHECK-O0-LABEL: foo:
; CHECK-O0: orr w{{.*}}, wzr, #0x10
; CHECK-O0: malloc
; CHECK-O0: mov [[ID2:x[0-9]+]], x0
; CHECK-O0: orr [[ID:w[0-9]+]], wzr, #0x1
; CHECK-O0: strb [[ID]], [x0, #8]
; CHECK-O0: mov x19, [[ID2]]
; CHECK-O0-NOT: x19
entry:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
ret float 1.0
}
; "caller" calls "foo" that takes a swifterror parameter.
define float @caller(i8* %error_ref) {
; CHECK-APPLE-LABEL: caller:
; CHECK-APPLE: mov [[ID:x[0-9]+]], x0
; CHECK-APPLE: mov x19, xzr
; CHECK-APPLE: bl {{.*}}foo
; CHECK-APPLE: cbnz x19
; Access part of the error object and save it to error_ref
; CHECK-APPLE: ldrb [[CODE:w[0-9]+]], [x19, #8]
; CHECK-APPLE: strb [[CODE]], [{{.*}}[[ID]]]
; CHECK-APPLE: mov x0, x19
; CHECK_APPLE: bl {{.*}}free
; CHECK-O0-LABEL: caller:
; CHECK-O0: mov x19
; CHECK-O0: bl {{.*}}foo
; CHECK-O0: mov [[ID:x[0-9]+]], x19
; CHECK-O0: cbnz [[ID]]
entry:
%error_ptr_ref = alloca swifterror %swift_error*
store %swift_error* null, %swift_error** %error_ptr_ref
%call = call float @foo(%swift_error** swifterror %error_ptr_ref)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
ret float 1.0
}
; "caller2" is the caller of "foo", it calls "foo" inside a loop.
define float @caller2(i8* %error_ref) {
; CHECK-APPLE-LABEL: caller2:
; CHECK-APPLE: mov [[ID:x[0-9]+]], x0
; CHECK-APPLE: fmov [[CMP:s[0-9]+]], #1.0
; CHECK-APPLE: mov x19, xzr
; CHECK-APPLE: bl {{.*}}foo
; CHECK-APPLE: cbnz x19
; CHECK-APPLE: fcmp s0, [[CMP]]
; CHECK-APPLE: b.le
; Access part of the error object and save it to error_ref
; CHECK-APPLE: ldrb [[CODE:w[0-9]+]], [x19, #8]
; CHECK-APPLE: strb [[CODE]], [{{.*}}[[ID]]]
; CHECK-APPLE: mov x0, x19
; CHECK_APPLE: bl {{.*}}free
; CHECK-O0-LABEL: caller2:
; CHECK-O0: mov x19
; CHECK-O0: bl {{.*}}foo
; CHECK-O0: mov [[ID:x[0-9]+]], x19
; CHECK-O0: cbnz [[ID]]
entry:
%error_ptr_ref = alloca swifterror %swift_error*
br label %bb_loop
bb_loop:
store %swift_error* null, %swift_error** %error_ptr_ref
%call = call float @foo(%swift_error** swifterror %error_ptr_ref)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%cmp = fcmp ogt float %call, 1.000000e+00
br i1 %cmp, label %bb_end, label %bb_loop
bb_end:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
ret float 1.0
}
; "foo_if" is a function that takes a swifterror parameter, it sets swifterror
; under a certain condition.
define float @foo_if(%swift_error** swifterror %error_ptr_ref, i32 %cc) {
; CHECK-APPLE-LABEL: foo_if:
; CHECK-APPLE: cbz w0
; CHECK-APPLE: orr w0, wzr, #0x10
; CHECK-APPLE: malloc
; CHECK-APPLE: orr [[ID:w[0-9]+]], wzr, #0x1
; CHECK-APPLE: strb [[ID]], [x0, #8]
; CHECK-APPLE: mov x19, x0
; CHECK-APPLE-NOT: x19
; CHECK-APPLE: ret
; CHECK-O0-LABEL: foo_if:
; spill x19
; CHECK-O0: str x19
; CHECK-O0: cbz w0
; CHECK-O0: orr w{{.*}}, wzr, #0x10
; CHECK-O0: malloc
; CHECK-O0: mov [[ID:x[0-9]+]], x0
; CHECK-O0: orr [[ID2:w[0-9]+]], wzr, #0x1
; CHECK-O0: strb [[ID2]], [x0, #8]
; CHECK-O0: mov x19, [[ID]]
; CHECK-O0: ret
; reload from stack
; CHECK-O0: ldr x19
; CHECK-O0: ret
entry:
%cond = icmp ne i32 %cc, 0
br i1 %cond, label %gen_error, label %normal
gen_error:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
ret float 1.0
normal:
ret float 0.0
}
; "foo_loop" is a function that takes a swifterror parameter, it sets swifterror
; under a certain condition inside a loop.
define float @foo_loop(%swift_error** swifterror %error_ptr_ref, i32 %cc, float %cc2) {
; CHECK-APPLE-LABEL: foo_loop:
; CHECK-APPLE: mov x0, x19
; CHECK-APPLE: cbz
; CHECK-APPLE: orr w0, wzr, #0x10
; CHECK-APPLE: malloc
; CHECK-APPLE: strb w{{.*}}, [x0, #8]
; CHECK-APPLE: fcmp
; CHECK-APPLE: b.le
; CHECK-APPLE: mov x19, x0
; CHECK-APPLE: ret
; CHECK-O0-LABEL: foo_loop:
; spill x19
; CHECK-O0: str x19
; CHECk-O0: cbz
; CHECK-O0: orr w{{.*}}, wzr, #0x10
; CHECK-O0: malloc
; CHECK-O0: mov [[ID:x[0-9]+]], x0
; CHECK-O0: strb w{{.*}}, [{{.*}}[[ID]], #8]
; spill x0
; CHECK-O0: str x0
; CHECK-O0: fcmp
; CHECK-O0: b.le
; reload from stack
; CHECK-O0: ldr x19
; CHECK-O0: ret
entry:
br label %bb_loop
bb_loop:
%cond = icmp ne i32 %cc, 0
br i1 %cond, label %gen_error, label %bb_cont
gen_error:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
br label %bb_cont
bb_cont:
%cmp = fcmp ogt float %cc2, 1.000000e+00
br i1 %cmp, label %bb_end, label %bb_loop
bb_end:
ret float 0.0
}
%struct.S = type { i32, i32, i32, i32, i32, i32 }
; "foo_sret" is a function that takes a swifterror parameter, it also has a sret
; parameter.
define void @foo_sret(%struct.S* sret %agg.result, i32 %val1, %swift_error** swifterror %error_ptr_ref) {
; CHECK-APPLE-LABEL: foo_sret:
; CHECK-APPLE: mov [[SRET:x[0-9]+]], x8
; CHECK-APPLE: orr w0, wzr, #0x10
; CHECK-APPLE: malloc
; CHECK-APPLE: orr [[ID:w[0-9]+]], wzr, #0x1
; CHECK-APPLE: strb [[ID]], [x0, #8]
; CHECK-APPLE: str w{{.*}}, [{{.*}}[[SRET]], #4]
; CHECK-APPLE: mov x19, x0
; CHECK-APPLE-NOT: x19
; CHECK-O0-LABEL: foo_sret:
; CHECK-O0: orr w{{.*}}, wzr, #0x10
; spill x8
; CHECK-O0-DAG: str x8
; spill x19
; CHECK-O0-DAG: str x19
; CHECK-O0: malloc
; CHECK-O0: orr [[ID:w[0-9]+]], wzr, #0x1
; CHECK-O0: strb [[ID]], [x0, #8]
; reload from stack
; CHECK-O0: ldr [[SRET:x[0-9]+]]
; CHECK-O0: str w{{.*}}, [{{.*}}[[SRET]], #4]
; CHECK-O0: mov x19
; CHECK-O0-NOT: x19
entry:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
%v2 = getelementptr inbounds %struct.S, %struct.S* %agg.result, i32 0, i32 1
store i32 %val1, i32* %v2
ret void
}
; "caller3" calls "foo_sret" that takes a swifterror parameter.
define float @caller3(i8* %error_ref) {
; CHECK-APPLE-LABEL: caller3:
; CHECK-APPLE: mov [[ID:x[0-9]+]], x0
; CHECK-APPLE: mov x19, xzr
; CHECK-APPLE: bl {{.*}}foo_sret
; CHECK-APPLE: cbnz x19
; Access part of the error object and save it to error_ref
; CHECK-APPLE: ldrb [[CODE:w[0-9]+]], [x19, #8]
; CHECK-APPLE: strb [[CODE]], [{{.*}}[[ID]]]
; CHECK-APPLE: mov x0, x19
; CHECK_APPLE: bl {{.*}}free
; CHECK-O0-LABEL: caller3:
; spill x0
; CHECK-O0: str x0
; CHECK-O0: mov x19
; CHECK-O0: bl {{.*}}foo_sret
; CHECK-O0: mov [[ID2:x[0-9]+]], x19
; CHECK-O0: cbnz [[ID2]]
; Access part of the error object and save it to error_ref
; reload from stack
; CHECK-O0: ldrb [[CODE:w[0-9]+]]
; CHECK-O0: ldr [[ID:x[0-9]+]]
; CHECK-O0: strb [[CODE]], [{{.*}}[[ID]]]
; CHECK_O0: bl {{.*}}free
entry:
%s = alloca %struct.S, align 8
%error_ptr_ref = alloca swifterror %swift_error*
store %swift_error* null, %swift_error** %error_ptr_ref
call void @foo_sret(%struct.S* sret %s, i32 1, %swift_error** swifterror %error_ptr_ref)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
ret float 1.0
}
; "foo_vararg" is a function that takes a swifterror parameter, it also has
; variable number of arguments.
declare void @llvm.va_start(i8*) nounwind
define float @foo_vararg(%swift_error** swifterror %error_ptr_ref, ...) {
; CHECK-APPLE-LABEL: foo_vararg:
; CHECK-APPLE: orr w0, wzr, #0x10
; CHECK-APPLE: malloc
; CHECK-APPLE: orr [[ID:w[0-9]+]], wzr, #0x1
; CHECK-FIXMEAPPLE: add [[ARGS:x[0-9]+]], [[TMP:x[0-9]+]], #16
; CHECK-APPLE: strb [[ID]], [x0, #8]
; First vararg
; CHECK-FIXMEAPPLE-DAG: orr {{x[0-9]+}}, [[ARGS]], #0x8
; CHECK-FIXMEAPPLE-DAG: ldr {{w[0-9]+}}, [{{.*}}[[TMP]], #16]
; CHECK-APPLE: add {{x[0-9]+}}, {{x[0-9]+}}, #8
; Second vararg
; CHECK-APPLE: ldr {{w[0-9]+}}, [{{x[0-9]+}}]
; CHECK-APPLE: add {{x[0-9]+}}, {{x[0-9]+}}, #8
; Third vararg
; CHECK-APPLE: ldr {{w[0-9]+}}, [{{x[0-9]+}}]
; CHECK-APPLE: mov x19, x0
; CHECK-APPLE-NOT: x19
entry:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
%args = alloca i8*, align 8
%a10 = alloca i32, align 4
%a11 = alloca i32, align 4
%a12 = alloca i32, align 4
%v10 = bitcast i8** %args to i8*
call void @llvm.va_start(i8* %v10)
%v11 = va_arg i8** %args, i32
store i32 %v11, i32* %a10, align 4
%v12 = va_arg i8** %args, i32
store i32 %v12, i32* %a11, align 4
%v13 = va_arg i8** %args, i32
store i32 %v13, i32* %a12, align 4
ret float 1.0
}
; "caller4" calls "foo_vararg" that takes a swifterror parameter.
define float @caller4(i8* %error_ref) {
; CHECK-APPLE-LABEL: caller4:
; CHECK-APPLE: mov [[ID:x[0-9]+]], x0
; CHECK-APPLE: stp {{x[0-9]+}}, {{x[0-9]+}}, [sp, #8]
; CHECK-APPLE: str {{x[0-9]+}}, [sp]
; CHECK-APPLE: mov x19, xzr
; CHECK-APPLE: bl {{.*}}foo_vararg
; CHECK-APPLE: cbnz x19
; Access part of the error object and save it to error_ref
; CHECK-APPLE: ldrb [[CODE:w[0-9]+]], [x19, #8]
; CHECK-APPLE: strb [[CODE]], [{{.*}}[[ID]]]
; CHECK-APPLE: mov x0, x19
; CHECK_APPLE: bl {{.*}}free
entry:
%error_ptr_ref = alloca swifterror %swift_error*
store %swift_error* null, %swift_error** %error_ptr_ref
%a10 = alloca i32, align 4
%a11 = alloca i32, align 4
%a12 = alloca i32, align 4
store i32 10, i32* %a10, align 4
store i32 11, i32* %a11, align 4
store i32 12, i32* %a12, align 4
%v10 = load i32, i32* %a10, align 4
%v11 = load i32, i32* %a11, align 4
%v12 = load i32, i32* %a12, align 4
%call = call float (%swift_error**, ...) @foo_vararg(%swift_error** swifterror %error_ptr_ref, i32 %v10, i32 %v11, i32 %v12)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
ret float 1.0
}

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; RUN: llc -verify-machineinstrs < %s -mtriple=armv7-apple-ios | FileCheck --check-prefix=CHECK-APPLE %s
; RUN: llc -verify-machineinstrs -O0 < %s -mtriple=armv7-apple-ios | FileCheck --check-prefix=CHECK-O0 %s
declare i8* @malloc(i64)
declare void @free(i8*)
%swift_error = type { i64, i8 }
%struct.S = type { i32, i32, i32, i32, i32, i32 }
; This tests the basic usage of a swifterror parameter. "foo" is the function
; that takes a swifterror parameter and "caller" is the caller of "foo".
define float @foo(%swift_error** swifterror %error_ptr_ref) {
; CHECK-APPLE-LABEL: foo:
; CHECK-APPLE: mov r0, #16
; CHECK-APPLE: malloc
; CHECK-APPLE-DAG: mov [[ID:r[0-9]+]], #1
; CHECK-APPLE-DAG: mov r6, r{{.*}}
; CHECK-APPLE-DAG: strb [[ID]], [r{{.*}}, #8]
; CHECK-O0-LABEL: foo:
; CHECK-O0: mov r{{.*}}, #16
; CHECK-O0: malloc
; CHECK-O0: mov [[ID2:r[0-9]+]], r0
; CHECK-O0: mov [[ID:r[0-9]+]], #1
; CHECK-O0: strb [[ID]], [r0, #8]
; CHECK-O0: mov r6, [[ID2]]
entry:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
ret float 1.0
}
; "caller" calls "foo" that takes a swifterror parameter.
define float @caller(i8* %error_ref) {
; CHECK-APPLE-LABEL: caller:
; CHECK-APPLE-DAG: mov [[ID:r[0-9]+]], r0
; CHECK-APPLE-DAG: mov r6, #0
; CHECK-APPLE: bl {{.*}}foo
; CHECK-APPLE: cmp r6, #0
; Access part of the error object and save it to error_ref
; CHECK-APPLE: ldrbeq [[CODE:r[0-9]+]], [r6, #8]
; CHECK-APPLE: strbeq [[CODE]], [{{.*}}[[ID]]]
; CHECK-APPLE: mov r0, r6
; CHECK_APPLE: bl {{.*}}free
; CHECK-O0-LABEL: caller:
; spill r0
; CHECK-O0-DAG: str r0,
; CHECK-O0-DAG: mov r6, #0
; CHECK-O0: bl {{.*}}foo
; CHECK-O0: mov r{{.*}}, r6
; CHECK-O0: bne
; CHECK-O0: ldrb [[CODE:r[0-9]+]], [r0, #8]
; reload r0
; CHECK-O0: ldr [[ID:r[0-9]+]],
; CHECK-O0: strb [[CODE]], [{{.*}}[[ID]]]
; CHECK-O0: mov r0,
; CHECK-O0: free
entry:
%error_ptr_ref = alloca swifterror %swift_error*
store %swift_error* null, %swift_error** %error_ptr_ref
%call = call float @foo(%swift_error** swifterror %error_ptr_ref)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
ret float 1.0
}
; "caller2" is the caller of "foo", it calls "foo" inside a loop.
define float @caller2(i8* %error_ref) {
; CHECK-APPLE-LABEL: caller2:
; CHECK-APPLE-DAG: mov [[ID:r[0-9]+]], r0
; CHECK-APPLE-DAG: mov r6, #0
; CHECK-APPLE: bl {{.*}}foo
; CHECK-APPLE: cmp r6, #0
; CHECK-APPLE: bne
; Access part of the error object and save it to error_ref
; CHECK-APPLE: ldrb [[CODE:r[0-9]+]], [r6, #8]
; CHECK-APPLE: strb [[CODE]], [{{.*}}[[ID]]]
; CHECK-APPLE: mov r0, r6
; CHECK_APPLE: bl {{.*}}free
; CHECK-O0-LABEL: caller2:
; spill r0
; CHECK-O0-DAG: str r0,
; CHECK-O0-DAG: mov r6, #0
; CHECK-O0: bl {{.*}}foo
; CHECK-O0: mov r{{.*}}, r6
; CHECK-O0: bne
; CHECK-O0: ble
; CHECK-O0: ldrb [[CODE:r[0-9]+]], [r0, #8]
; reload r0
; CHECK-O0: ldr [[ID:r[0-9]+]],
; CHECK-O0: strb [[CODE]], [{{.*}}[[ID]]]
; CHECK-O0: mov r0,
; CHECK-O0: free
entry:
%error_ptr_ref = alloca swifterror %swift_error*
br label %bb_loop
bb_loop:
store %swift_error* null, %swift_error** %error_ptr_ref
%call = call float @foo(%swift_error** swifterror %error_ptr_ref)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%cmp = fcmp ogt float %call, 1.000000e+00
br i1 %cmp, label %bb_end, label %bb_loop
bb_end:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
ret float 1.0
}
; "foo_if" is a function that takes a swifterror parameter, it sets swifterror
; under a certain condition.
define float @foo_if(%swift_error** swifterror %error_ptr_ref, i32 %cc) {
; CHECK-APPLE-LABEL: foo_if:
; CHECK-APPLE: cmp r0, #0
; CHECK-APPLE: eq
; CHECK-APPLE: mov r0, #16
; CHECK-APPLE: malloc
; CHECK-APPLE: mov [[ID:r[0-9]+]], #1
; CHECK-APPLE-DAG: mov r6, r{{.*}}
; CHECK-APPLE-DAG: strb [[ID]], [r{{.*}}, #8]
; CHECK-O0-LABEL: foo_if:
; CHECK-O0: cmp r0, #0
; spill to stack
; CHECK-O0: str r6
; CHECK-O0: beq
; CHECK-O0: mov r0, #16
; CHECK-O0: malloc
; CHECK-O0: mov [[ID:r[0-9]+]], r0
; CHECK-O0: mov [[ID2:[a-z0-9]+]], #1
; CHECK-O0: strb [[ID2]], [r0, #8]
; CHECK-O0: mov r6, [[ID]]
; reload from stack
; CHECK-O0: ldr r6
entry:
%cond = icmp ne i32 %cc, 0
br i1 %cond, label %gen_error, label %normal
gen_error:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
ret float 1.0
normal:
ret float 0.0
}
; "foo_loop" is a function that takes a swifterror parameter, it sets swifterror
; under a certain condition inside a loop.
define float @foo_loop(%swift_error** swifterror %error_ptr_ref, i32 %cc, float %cc2) {
; CHECK-APPLE-LABEL: foo_loop:
; CHECK-APPLE: mov [[CODE:r[0-9]+]], r0
; swifterror is kept in a register
; CHECK-APPLE: mov [[ID:r[0-9]+]], r6
; CHECK-APPLE: cmp [[CODE]], #0
; CHECK-APPLE: beq
; CHECK-APPLE: mov r0, #16
; CHECK-APPLE: malloc
; CHECK-APPLE: strb r{{.*}}, [{{.*}}[[ID]], #8]
; CHECK-APPLE: ble
; CHECK-APPLE: mov r6, [[ID]]
; CHECK-O0-LABEL: foo_loop:
; CHECK-O0: mov r{{.*}}, r6
; CHECK-O0: cmp r{{.*}}, #0
; CHECK-O0: beq
; CHECK-O0-DAG: movw r{{.*}}, #1
; CHECK-O0-DAG: mov r{{.*}}, #16
; CHECK-O0: malloc
; CHECK-O0-DAG: mov [[ID:r[0-9]+]], r0
; CHECK-O0-DAG: ldr [[ID2:r[0-9]+]], [sp{{.*}}]
; CHECK-O0: strb [[ID2]], [{{.*}}[[ID]], #8]
; spill r0
; CHECK-O0: str r0, [sp{{.*}}]
; CHECK-O0: vcmpe
; CHECK-O0: ble
; reload from stack
; CHECK-O0: ldr r6
entry:
br label %bb_loop
bb_loop:
%cond = icmp ne i32 %cc, 0
br i1 %cond, label %gen_error, label %bb_cont
gen_error:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
br label %bb_cont
bb_cont:
%cmp = fcmp ogt float %cc2, 1.000000e+00
br i1 %cmp, label %bb_end, label %bb_loop
bb_end:
ret float 0.0
}
; "foo_sret" is a function that takes a swifterror parameter, it also has a sret
; parameter.
define void @foo_sret(%struct.S* sret %agg.result, i32 %val1, %swift_error** swifterror %error_ptr_ref) {
; CHECK-APPLE-LABEL: foo_sret:
; CHECK-APPLE: mov [[SRET:r[0-9]+]], r0
; CHECK-APPLE: mov r0, #16
; CHECK-APPLE: malloc
; CHECK-APPLE: mov [[REG:r[0-9]+]], #1
; CHECK-APPLE-DAG: mov r6, r0
; CHECK-APPLE-DAG: strb [[REG]], [r0, #8]
; CHECK-APPLE-DAG: str r{{.*}}, [{{.*}}[[SRET]], #4]
; CHECK-O0-LABEL: foo_sret:
; CHECK-O0: mov r{{.*}}, #16
; spill to stack: sret and val1
; CHECK-O0-DAG: str r0
; CHECK-O0-DAG: str r1
; CHECK-O0: malloc
; CHECK-O0: mov [[ID:r[0-9]+]], #1
; CHECK-O0: strb [[ID]], [r0, #8]
; reload from stack: sret and val1
; CHECK-O0: ldr
; CHECK-O0: ldr
; CHECK-O0: str r{{.*}}, [{{.*}}, #4]
; CHECK-O0: mov r6
entry:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
%v2 = getelementptr inbounds %struct.S, %struct.S* %agg.result, i32 0, i32 1
store i32 %val1, i32* %v2
ret void
}
; "caller3" calls "foo_sret" that takes a swifterror parameter.
define float @caller3(i8* %error_ref) {
; CHECK-APPLE-LABEL: caller3:
; CHECK-APPLE: mov [[ID:r[0-9]+]], r0
; CHECK-APPLE: mov r6, #0
; CHECK-APPLE: bl {{.*}}foo_sret
; CHECK-APPLE: cmp r6, #0
; Access part of the error object and save it to error_ref
; CHECK-APPLE: ldrbeq [[CODE:r[0-9]+]], [r6, #8]
; CHECK-APPLE: strbeq [[CODE]], [{{.*}}[[ID]]]
; CHECK-APPLE: mov r0, r6
; CHECK_APPLE: bl {{.*}}free
; CHECK-O0-LABEL: caller3:
; CHECK-O0-DAG: mov r6, #0
; CHECK-O0-DAG: mov r0
; CHECK-O0-DAG: mov r1
; CHECK-O0: bl {{.*}}foo_sret
; CHECK-O0: mov [[ID2:r[0-9]+]], r6
; CHECK-O0: cmp [[ID2]]
; CHECK-O0: bne
; Access part of the error object and save it to error_ref
; CHECK-O0: ldrb [[CODE:r[0-9]+]]
; CHECK-O0: ldr [[ID:r[0-9]+]]
; CHECK-O0: strb [[CODE]], [{{.*}}[[ID]]]
; CHECK-O0: mov r0,
; CHECK_O0: bl {{.*}}free
entry:
%s = alloca %struct.S, align 8
%error_ptr_ref = alloca swifterror %swift_error*
store %swift_error* null, %swift_error** %error_ptr_ref
call void @foo_sret(%struct.S* sret %s, i32 1, %swift_error** swifterror %error_ptr_ref)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
ret float 1.0
}
; "foo_vararg" is a function that takes a swifterror parameter, it also has
; variable number of arguments.
declare void @llvm.va_start(i8*) nounwind
define float @foo_vararg(%swift_error** swifterror %error_ptr_ref, ...) {
; CHECK-APPLE-LABEL: foo_vararg:
; CHECK-APPLE: mov r0, #16
; CHECK-APPLE: malloc
; CHECK-APPLE: mov [[REG:r[0-9]+]], r0
; CHECK-APPLE: mov [[ID:r[0-9]+]], #1
; CHECK-APPLE-DAG: strb [[ID]], [{{.*}}[[REG]], #8]
; CHECK-APPLE-DAG: mov r6, [[REG]]
entry:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
%args = alloca i8*, align 8
%a10 = alloca i32, align 4
%a11 = alloca i32, align 4
%a12 = alloca i32, align 4
%v10 = bitcast i8** %args to i8*
call void @llvm.va_start(i8* %v10)
%v11 = va_arg i8** %args, i32
store i32 %v11, i32* %a10, align 4
%v12 = va_arg i8** %args, i32
store i32 %v12, i32* %a11, align 4
%v13 = va_arg i8** %args, i32
store i32 %v13, i32* %a12, align 4
ret float 1.0
}
; "caller4" calls "foo_vararg" that takes a swifterror parameter.
define float @caller4(i8* %error_ref) {
; CHECK-APPLE-LABEL: caller4:
; CHECK-APPLE: mov [[ID:r[0-9]+]], r0
; CHECK-APPLE: mov r6, #0
; CHECK-APPLE: bl {{.*}}foo_vararg
; CHECK-APPLE: cmp r6, #0
; Access part of the error object and save it to error_ref
; CHECK-APPLE: ldrbeq [[CODE:r[0-9]+]], [r6, #8]
; CHECK-APPLE: strbeq [[CODE]], [{{.*}}[[ID]]]
; CHECK-APPLE: mov r0, r6
; CHECK_APPLE: bl {{.*}}free
entry:
%error_ptr_ref = alloca swifterror %swift_error*
store %swift_error* null, %swift_error** %error_ptr_ref
%a10 = alloca i32, align 4
%a11 = alloca i32, align 4
%a12 = alloca i32, align 4
store i32 10, i32* %a10, align 4
store i32 11, i32* %a11, align 4
store i32 12, i32* %a12, align 4
%v10 = load i32, i32* %a10, align 4
%v11 = load i32, i32* %a11, align 4
%v12 = load i32, i32* %a12, align 4
%call = call float (%swift_error**, ...) @foo_vararg(%swift_error** swifterror %error_ptr_ref, i32 %v10, i32 %v11, i32 %v12)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
ret float 1.0
}

359
test/CodeGen/X86/swifterror.ll Normal file
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@ -0,0 +1,359 @@
; RUN: llc -verify-machineinstrs < %s -mtriple=x86_64-apple-darwin | FileCheck --check-prefix=CHECK-APPLE %s
; RUN: llc -verify-machineinstrs -O0 < %s -mtriple=x86_64-apple-darwin | FileCheck --check-prefix=CHECK-O0 %s
declare i8* @malloc(i64)
declare void @free(i8*)
%swift_error = type {i64, i8}
; This tests the basic usage of a swifterror parameter. "foo" is the function
; that takes a swifterror parameter and "caller" is the caller of "foo".
define float @foo(%swift_error** swifterror %error_ptr_ref) {
; CHECK-APPLE-LABEL: foo:
; CHECK-APPLE: movl $16, %edi
; CHECK-APPLE: malloc
; CHECK-APPLE: movb $1, 8(%rax)
; CHECK-APPLE: movq %rax, %r12
; CHECK-O0-LABEL: foo:
; CHECK-O0: movl $16
; CHECK-O0: malloc
; CHECK-O0: movb $1, 8(%rax)
; CHECK-O0: movq %{{.*}}, %r12
entry:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
ret float 1.0
}
; "caller" calls "foo" that takes a swifterror parameter.
define float @caller(i8* %error_ref) {
; CHECK-APPLE-LABEL: caller:
; CHECK-APPLE: xorl %r12d, %r12d
; CHECK-APPLE: callq {{.*}}foo
; CHECK-APPLE: testq %r12, %r12
; CHECK-APPLE: jne
; Access part of the error object and save it to error_ref
; CHECK-APPLE: movb 8(%r12)
; CHECK-APPLE: movq %r12, %rdi
; CHECK_APPLE: callq {{.*}}free
; CHECK-O0-LABEL: caller:
; CHECK-O0: xorl
; CHECK-O0: movl %{{.*}}, %r12d
; CHECK-O0: callq {{.*}}foo
; CHECK-O0: jne
entry:
%error_ptr_ref = alloca swifterror %swift_error*
store %swift_error* null, %swift_error** %error_ptr_ref
%call = call float @foo(%swift_error** swifterror %error_ptr_ref)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
ret float 1.0
}
; "caller2" is the caller of "foo", it calls "foo" inside a loop.
define float @caller2(i8* %error_ref) {
; CHECK-APPLE-LABEL: caller2:
; CHECK-APPLE: xorl %r12d, %r12d
; CHECK-APPLE: callq {{.*}}foo
; CHECK-APPLE: testq %r12, %r12
; CHECK-APPLE: jne
; CHECK-APPLE: ucomiss
; CHECK-APPLE: jbe
; Access part of the error object and save it to error_ref
; CHECK-APPLE: movb 8(%r12)
; CHECK-APPLE: movq %r12, %rdi
; CHECK_APPLE: callq {{.*}}free
; CHECK-O0-LABEL: caller2:
; CHECK-O0: xorl
; CHECK-O0: movl %{{.*}}, %r12d
; CHECK-O0: callq {{.*}}foo
; CHECK-O0: movq %r12, [[ID:%[a-z]+]]
; CHECK-O0: cmpq $0, [[ID]]
; CHECK-O0: jne
entry:
%error_ptr_ref = alloca swifterror %swift_error*
br label %bb_loop
bb_loop:
store %swift_error* null, %swift_error** %error_ptr_ref
%call = call float @foo(%swift_error** swifterror %error_ptr_ref)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%cmp = fcmp ogt float %call, 1.000000e+00
br i1 %cmp, label %bb_end, label %bb_loop
bb_end:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
ret float 1.0
}
; "foo_if" is a function that takes a swifterror parameter, it sets swifterror
; under a certain condition.
define float @foo_if(%swift_error** swifterror %error_ptr_ref, i32 %cc) {
; CHECK-APPLE-LABEL: foo_if:
; CHECK-APPLE: testl %edi, %edi
; CHECK-APPLE: je
; CHECK-APPLE: movl $16, %edi
; CHECK-APPLE: malloc
; CHECK-APPLE: movb $1, 8(%rax)
; CHECK-APPLE: movq %rax, %r12
; CHECK-APPLE-NOT: %r12
; CHECK-APPLE: ret
; CHECK-O0-LABEL: foo_if:
; CHECK-O0: cmpl $0
; spill to stack
; CHECK-O0: movq %r12, {{.*}}(%rsp)
; CHECK-O0: je
; CHECK-O0: movl $16,
; CHECK-O0: malloc
; CHECK-O0: movq %rax, [[ID:%[a-z]+]]
; CHECK-O0-DAG: movb $1, 8(%rax)
; CHECK-O0-DAG: movq [[ID]], %r12
; CHECK-O0: ret
; reload from stack
; CHECK-O0: movq {{.*}}(%rsp), %r12
; CHECK-O0: ret
entry:
%cond = icmp ne i32 %cc, 0
br i1 %cond, label %gen_error, label %normal
gen_error:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
ret float 1.0
normal:
ret float 0.0
}
; "foo_loop" is a function that takes a swifterror parameter, it sets swifterror
; under a certain condition inside a loop.
define float @foo_loop(%swift_error** swifterror %error_ptr_ref, i32 %cc, float %cc2) {
; CHECK-APPLE-LABEL: foo_loop:
; CHECK-APPLE: movq %r12, %rax
; CHECK-APPLE: testl
; CHECK-APPLE: je
; CHECK-APPLE: movl $16, %edi
; CHECK-APPLE: malloc
; CHECK-APPLE: movb $1, 8(%rax)
; CHECK-APPLE: ucomiss
; CHECK-APPLE: jbe
; CHECK-APPLE: movq %rax, %r12
; CHECK-APPLE: ret
; CHECK-O0-LABEL: foo_loop:
; spill to stack
; CHECK-O0: movq %r12, {{.*}}(%rsp)
; CHECK-O0: cmpl $0
; CHECK-O0: je
; CHECK-O0: movl $16,
; CHECK-O0: malloc
; CHECK-O0: movq %rax, [[ID:%[a-z]+]]
; CHECK-O0: movb $1, 8([[ID]])
; CHECK-O0: jbe
; reload from stack
; CHECK-O0: movq {{.*}}(%rsp), %r12
; CHECK-O0: ret
entry:
br label %bb_loop
bb_loop:
%cond = icmp ne i32 %cc, 0
br i1 %cond, label %gen_error, label %bb_cont
gen_error:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
br label %bb_cont
bb_cont:
%cmp = fcmp ogt float %cc2, 1.000000e+00
br i1 %cmp, label %bb_end, label %bb_loop
bb_end:
ret float 0.0
}
%struct.S = type { i32, i32, i32, i32, i32, i32 }
; "foo_sret" is a function that takes a swifterror parameter, it also has a sret
; parameter.
define void @foo_sret(%struct.S* sret %agg.result, i32 %val1, %swift_error** swifterror %error_ptr_ref) {
; CHECK-APPLE-LABEL: foo_sret:
; CHECK-APPLE: movq %rdi, %{{.*}}
; CHECK-APPLE: movl $16, %edi
; CHECK-APPLE: malloc
; CHECK-APPLE: movb $1, 8(%rax)
; CHECK-APPLE: movl %{{.*}}, 4(%{{.*}})
; CHECK-APPLE: movq %rax, %r12
; CHECK-APPLE: movq %{{.*}}, %rax
; CHECK-APPLE-NOT: x19
; CHECK-O0-LABEL: foo_sret:
; CHECK-O0: movl $16,
; spill sret to stack
; CHECK-O0: movq %rdi,
; CHECK-O0: movq {{.*}}, %rdi
; CHECK-O0: malloc
; CHECK-O0: movb $1, 8(%rax)
; CHECK-O0: movl %{{.*}}, 4(%{{.*}})
; CHECK-O0: movq %{{.*}}, %r12
; reload sret from stack
; CHECK-O0: movq {{.*}}(%rsp), %rax
; CHECK-O0: ret
entry:
%call = call i8* @malloc(i64 16)
%call.0 = bitcast i8* %call to %swift_error*
store %swift_error* %call.0, %swift_error** %error_ptr_ref
%tmp = getelementptr inbounds i8, i8* %call, i64 8
store i8 1, i8* %tmp
%v2 = getelementptr inbounds %struct.S, %struct.S* %agg.result, i32 0, i32 1
store i32 %val1, i32* %v2
ret void
}
; "caller3" calls "foo_sret" that takes a swifterror parameter.
define float @caller3(i8* %error_ref) {
; CHECK-APPLE-LABEL: caller3:
; CHECK-APPLE: movl $1, %esi
; CHECK-APPLE: xorl %r12d, %r12d
; CHECK-APPLE: callq {{.*}}foo_sret
; CHECK-APPLE: testq %r12, %r12
; CHECK-APPLE: jne
; Access part of the error object and save it to error_ref
; CHECK-APPLE: movb 8(%r12),
; CHECK-APPLE: movb %{{.*}},
; CHECK-APPLE: movq %r12, %rdi
; CHECK_APPLE: callq {{.*}}free
; CHECK-O0-LABEL: caller3:
; CHECK-O0: xorl
; CHECK-O0: movl {{.*}}, %r12d
; CHECK-O0: movl $1, %esi
; CHECK-O0: movq {{.*}}, %rdi
; CHECK-O0: callq {{.*}}foo_sret
; CHECK-O0: movq %r12,
; CHECK-O0: cmpq $0
; CHECK-O0: jne
; Access part of the error object and save it to error_ref
; CHECK-O0: movb 8(%{{.*}}),
; CHECK-O0: movb %{{.*}},
; reload from stack
; CHECK-O0: movq {{.*}}(%rsp), %rdi
; CHECK-O0: callq {{.*}}free
entry:
%s = alloca %struct.S, align 8
%error_ptr_ref = alloca swifterror %swift_error*
store %swift_error* null, %swift_error** %error_ptr_ref
call void @foo_sret(%struct.S* sret %s, i32 1, %swift_error** swifterror %error_ptr_ref)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
ret float 1.0
}
; This is a caller with multiple swifterror values, it calls "foo" twice, each
; time with a different swifterror value, from "alloca swifterror".
define float @caller_with_multiple_swifterror_values(i8* %error_ref, i8* %error_ref2) {
; CHECK-APPLE-LABEL: caller_with_multiple_swifterror_values:
; The first swifterror value:
; CHECK-APPLE: xorl %r12d, %r12d
; CHECK-APPLE: callq {{.*}}foo
; CHECK-APPLE: testq %r12, %r12
; CHECK-APPLE: jne
; Access part of the error object and save it to error_ref
; CHECK-APPLE: movb 8(%r12)
; CHECK-APPLE: movq %r12, %rdi
; CHECK_APPLE: callq {{.*}}free
; The second swifterror value:
; CHECK-APPLE: xorl %r12d, %r12d
; CHECK-APPLE: callq {{.*}}foo
; CHECK-APPLE: testq %r12, %r12
; CHECK-APPLE: jne
; Access part of the error object and save it to error_ref
; CHECK-APPLE: movb 8(%r12)
; CHECK-APPLE: movq %r12, %rdi
; CHECK_APPLE: callq {{.*}}free
; CHECK-O0-LABEL: caller_with_multiple_swifterror_values:
; The first swifterror value:
; CHECK-O0: xorl
; CHECK-O0: movl %{{.*}}, %r12d
; CHECK-O0: callq {{.*}}foo
; CHECK-O0: jne
; The second swifterror value:
; CHECK-O0: xorl
; CHECK-O0: movl %{{.*}}, %r12d
; CHECK-O0: callq {{.*}}foo
; CHECK-O0: jne
entry:
%error_ptr_ref = alloca swifterror %swift_error*
store %swift_error* null, %swift_error** %error_ptr_ref
%call = call float @foo(%swift_error** swifterror %error_ptr_ref)
%error_from_foo = load %swift_error*, %swift_error** %error_ptr_ref
%had_error_from_foo = icmp ne %swift_error* %error_from_foo, null
%tmp = bitcast %swift_error* %error_from_foo to i8*
br i1 %had_error_from_foo, label %handler, label %cont
cont:
%v1 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo, i64 0, i32 1
%t = load i8, i8* %v1
store i8 %t, i8* %error_ref
br label %handler
handler:
call void @free(i8* %tmp)
%error_ptr_ref2 = alloca swifterror %swift_error*
store %swift_error* null, %swift_error** %error_ptr_ref2
%call2 = call float @foo(%swift_error** swifterror %error_ptr_ref2)
%error_from_foo2 = load %swift_error*, %swift_error** %error_ptr_ref2
%had_error_from_foo2 = icmp ne %swift_error* %error_from_foo2, null
%bitcast2 = bitcast %swift_error* %error_from_foo2 to i8*
br i1 %had_error_from_foo2, label %handler2, label %cont2
cont2:
%v2 = getelementptr inbounds %swift_error, %swift_error* %error_from_foo2, i64 0, i32 1
%t2 = load i8, i8* %v2
store i8 %t2, i8* %error_ref2
br label %handler2
handler2:
call void @free(i8* %bitcast2)
ret float 1.0
}