Index: lib/Target/X86/X86FrameLowering.cpp =================================================================== --- lib/Target/X86/X86FrameLowering.cpp +++ lib/Target/X86/X86FrameLowering.cpp @@ -484,6 +484,35 @@ } } +static unsigned calculateSetFPREG(uint64_t SPAdjust) { + // Win64 ABI has a less restrictive limitation of 240; 128 works equally well + // and might require smaller successive adjustments. + const uint64_t Win64MaxSEHOffset = 128; + uint64_t SEHFrameOffset = std::min(SPAdjust, Win64MaxSEHOffset); + // Win64 ABI requires 16-byte alignment for the UWOP_SET_FPREG opcode. + return static_cast(RoundUpToAlignment(SEHFrameOffset, 16)); +} + +// If we're forcing a stack realignment we can't rely on just the frame +// info, we need to know the ABI stack alignment as well in case we +// have a call out. Otherwise just make sure we have some alignment - we'll +// go with the minimum SlotSize. +static uint64_t calculateMaxStackAlign(const MachineFunction &MF) { + const MachineFrameInfo *MFI = MF.getFrameInfo(); + uint64_t MaxAlign = MFI->getMaxAlignment(); // Desired stack alignment. + const X86Subtarget &STI = MF.getSubtarget(); + const X86RegisterInfo *RegInfo = STI.getRegisterInfo(); + unsigned SlotSize = RegInfo->getSlotSize(); + unsigned StackAlign = STI.getFrameLowering()->getStackAlignment(); + if (ForceStackAlign) { + if (MFI->hasCalls()) + MaxAlign = (StackAlign > MaxAlign) ? StackAlign : MaxAlign; + else if (MaxAlign < SlotSize) + MaxAlign = SlotSize; + } + return MaxAlign; +} + /// emitPrologue - Push callee-saved registers onto the stack, which /// automatically adjust the stack pointer. Adjust the stack pointer to allocate /// space for local variables. Also emit labels used by the exception handler to @@ -578,7 +607,7 @@ const TargetInstrInfo &TII = *STI.getInstrInfo(); MachineModuleInfo &MMI = MF.getMMI(); X86MachineFunctionInfo *X86FI = MF.getInfo(); - uint64_t MaxAlign = MFI->getMaxAlignment(); // Desired stack alignment. + uint64_t MaxAlign = calculateMaxStackAlign(MF); // Desired stack alignment. uint64_t StackSize = MFI->getStackSize(); // Number of bytes to allocate. bool HasFP = hasFP(MF); bool Is64Bit = STI.is64Bit(); @@ -591,7 +620,6 @@ bool NeedsDwarfCFI = !IsWinEH && (MMI.hasDebugInfo() || Fn->needsUnwindTableEntry()); bool UseLEA = STI.useLeaForSP(); - unsigned StackAlign = getStackAlignment(); unsigned SlotSize = RegInfo->getSlotSize(); unsigned FramePtr = RegInfo->getFrameRegister(MF); const unsigned MachineFramePtr = @@ -602,19 +630,11 @@ unsigned BasePtr = RegInfo->getBaseRegister(); DebugLoc DL; - // If we're forcing a stack realignment we can't rely on just the frame - // info, we need to know the ABI stack alignment as well in case we - // have a call out. Otherwise just make sure we have some alignment - we'll - // go with the minimum SlotSize. - if (ForceStackAlign) { - if (MFI->hasCalls()) - MaxAlign = (StackAlign > MaxAlign) ? StackAlign : MaxAlign; - else if (MaxAlign < SlotSize) - MaxAlign = SlotSize; - } - // Add RETADDR move area to callee saved frame size. int TailCallReturnAddrDelta = X86FI->getTCReturnAddrDelta(); + if (TailCallReturnAddrDelta && IsWinEH) + report_fatal_error("Can't handle guaranteed tail call under win64 yet"); + if (TailCallReturnAddrDelta < 0) X86FI->setCalleeSavedFrameSize( X86FI->getCalleeSavedFrameSize() - TailCallReturnAddrDelta); @@ -689,7 +709,7 @@ // Callee-saved registers are pushed on stack before the stack // is realigned. FrameSize -= X86FI->getCalleeSavedFrameSize(); - NumBytes = (FrameSize + MaxAlign - 1) / MaxAlign * MaxAlign; + NumBytes = RoundUpToAlignment(FrameSize, MaxAlign); } else { NumBytes = FrameSize - X86FI->getCalleeSavedFrameSize(); } @@ -728,11 +748,14 @@ .setMIFlag(MachineInstr::FrameSetup); } - // Update EBP with the new base value. - BuildMI(MBB, MBBI, DL, - TII.get(Uses64BitFramePtr ? X86::MOV64rr : X86::MOV32rr), FramePtr) - .addReg(StackPtr) - .setMIFlag(MachineInstr::FrameSetup); + if (!IsWinEH) { + // Update EBP with the new base value. + BuildMI(MBB, MBBI, DL, + TII.get(Uses64BitFramePtr ? X86::MOV64rr : X86::MOV32rr), + FramePtr) + .addReg(StackPtr) + .setMIFlag(MachineInstr::FrameSetup); + } if (NeedsDwarfCFI) { // Mark effective beginning of when frame pointer becomes valid. @@ -781,15 +804,16 @@ // Realign stack after we pushed callee-saved registers (so that we'll be // able to calculate their offsets from the frame pointer). - if (RegInfo->needsStackRealignment(MF)) { + // Don't do this for Win64, it needs to realign the stack after the prologue. + if (!IsWinEH && RegInfo->needsStackRealignment(MF)) { assert(HasFP && "There should be a frame pointer if stack is realigned."); uint64_t Val = -MaxAlign; MachineInstr *MI = - BuildMI(MBB, MBBI, DL, - TII.get(getANDriOpcode(Uses64BitFramePtr, Val)), StackPtr) - .addReg(StackPtr) - .addImm(Val) - .setMIFlag(MachineInstr::FrameSetup); + BuildMI(MBB, MBBI, DL, TII.get(getANDriOpcode(Uses64BitFramePtr, Val)), + StackPtr) + .addReg(StackPtr) + .addImm(Val) + .setMIFlag(MachineInstr::FrameSetup); // The EFLAGS implicit def is dead. MI->getOperand(3).setIsDead(); @@ -867,50 +891,28 @@ UseLEA, TII, *RegInfo); } + if (NeedsWinEH && NumBytes) + BuildMI(MBB, MBBI, DL, TII.get(X86::SEH_StackAlloc)) + .addImm(NumBytes) + .setMIFlag(MachineInstr::FrameSetup); + int SEHFrameOffset = 0; - if (NeedsWinEH) { - if (HasFP) { - // We need to set frame base offset low enough such that all saved - // register offsets would be positive relative to it, but we can't - // just use NumBytes, because .seh_setframe offset must be <=240. - // So we pretend to have only allocated enough space to spill the - // non-volatile registers. - // We don't care about the rest of stack allocation, because unwinder - // will restore SP to (BP - SEHFrameOffset) - for (const CalleeSavedInfo &Info : MFI->getCalleeSavedInfo()) { - int offset = MFI->getObjectOffset(Info.getFrameIdx()); - SEHFrameOffset = std::max(SEHFrameOffset, std::abs(offset)); - } - SEHFrameOffset += SEHFrameOffset % 16; // ensure alignmant - - // This only needs to account for XMM spill slots, GPR slots - // are covered by the .seh_pushreg's emitted above. - unsigned Size = SEHFrameOffset - X86FI->getCalleeSavedFrameSize(); - if (Size) { - BuildMI(MBB, MBBI, DL, TII.get(X86::SEH_StackAlloc)) - .addImm(Size) - .setMIFlag(MachineInstr::FrameSetup); - } + if (IsWinEH && HasFP) { + SEHFrameOffset = calculateSetFPREG(NumBytes); + addRegOffset(BuildMI(MBB, MBBI, DL, TII.get(X86::LEA64r), FramePtr), + StackPtr, false, SEHFrameOffset); + if (NeedsWinEH) BuildMI(MBB, MBBI, DL, TII.get(X86::SEH_SetFrame)) .addImm(FramePtr) .addImm(SEHFrameOffset) .setMIFlag(MachineInstr::FrameSetup); - } else { - // SP will be the base register for restoring XMMs - if (NumBytes) { - BuildMI(MBB, MBBI, DL, TII.get(X86::SEH_StackAlloc)) - .addImm(NumBytes) - .setMIFlag(MachineInstr::FrameSetup); - } - } } // Skip the rest of register spilling code while (MBBI != MBB.end() && MBBI->getFlag(MachineInstr::FrameSetup)) ++MBBI; - // Emit SEH info for non-GPRs if (NeedsWinEH) { for (const CalleeSavedInfo &Info : MFI->getCalleeSavedInfo()) { unsigned Reg = Info.getReg(); @@ -931,6 +933,23 @@ .setMIFlag(MachineInstr::FrameSetup); } + // Realign stack after we spilled callee-saved registers (so that we'll be + // able to calculate their offsets from the frame pointer). + // Win64 requires aligning the stack after the prologue. + if (IsWinEH && RegInfo->needsStackRealignment(MF)) { + assert(HasFP && "There should be a frame pointer if stack is realigned."); + uint64_t Val = -MaxAlign; + MachineInstr *MI = + BuildMI(MBB, MBBI, DL, TII.get(getANDriOpcode(Uses64BitFramePtr, Val)), + StackPtr) + .addReg(StackPtr) + .addImm(Val) + .setMIFlag(MachineInstr::FrameSetup); + + // The EFLAGS implicit def is dead. + MI->getOperand(3).setIsDead(); + } + // If we need a base pointer, set it up here. It's whatever the value // of the stack pointer is at this point. Any variable size objects // will be allocated after this, so we can still use the base pointer @@ -986,7 +1005,6 @@ const bool Uses64BitFramePtr = STI.isTarget64BitLP64() || STI.isTargetNaCl64(); const bool Is64BitILP32 = STI.isTarget64BitILP32(); bool UseLEA = STI.useLeaForSP(); - unsigned StackAlign = getStackAlignment(); unsigned SlotSize = RegInfo->getSlotSize(); unsigned FramePtr = RegInfo->getFrameRegister(MF); unsigned MachineFramePtr = @@ -1017,21 +1035,10 @@ // Get the number of bytes to allocate from the FrameInfo. uint64_t StackSize = MFI->getStackSize(); - uint64_t MaxAlign = MFI->getMaxAlignment(); + uint64_t MaxAlign = calculateMaxStackAlign(MF); unsigned CSSize = X86FI->getCalleeSavedFrameSize(); uint64_t NumBytes = 0; - // If we're forcing a stack realignment we can't rely on just the frame - // info, we need to know the ABI stack alignment as well in case we - // have a call out. Otherwise just make sure we have some alignment - we'll - // go with the minimum. - if (ForceStackAlign) { - if (MFI->hasCalls()) - MaxAlign = (StackAlign > MaxAlign) ? StackAlign : MaxAlign; - else - MaxAlign = MaxAlign ? MaxAlign : 4; - } - if (hasFP(MF)) { // Calculate required stack adjustment. uint64_t FrameSize = StackSize - SlotSize; @@ -1050,6 +1057,7 @@ } else { NumBytes = StackSize - CSSize; } + uint64_t SEHStackAllocAmt = NumBytes; // Skip the callee-saved pop instructions. while (MBBI != MBB.begin()) { @@ -1077,7 +1085,12 @@ if (RegInfo->needsStackRealignment(MF) || MFI->hasVarSizedObjects()) { if (RegInfo->needsStackRealignment(MF)) MBBI = FirstCSPop; - if (CSSize != 0) { + if (IsWinEH) { + unsigned SEHFrameOffset = calculateSetFPREG(SEHStackAllocAmt); + addRegOffset(BuildMI(MBB, MBBI, DL, TII.get(X86::LEA64r), StackPtr), + FramePtr, false, SEHStackAllocAmt - SEHFrameOffset); + --MBBI; + } else if (CSSize != 0) { unsigned Opc = getLEArOpcode(Uses64BitFramePtr); addRegOffset(BuildMI(MBB, MBBI, DL, TII.get(Opc), StackPtr), FramePtr, false, -CSSize); @@ -1195,14 +1208,53 @@ const X86RegisterInfo *RegInfo = MF.getSubtarget().getRegisterInfo(); const MachineFrameInfo *MFI = MF.getFrameInfo(); + // Offset will hold the offset from the stack pointer at function entry to the + // object. + // We need to factor in additional offsets applied during the prologue to the + // frame, base, and stack pointer depending on which is used. int Offset = MFI->getObjectOffset(FI) - getOffsetOfLocalArea(); + const X86MachineFunctionInfo *X86FI = MF.getInfo(); + unsigned CSSize = X86FI->getCalleeSavedFrameSize(); uint64_t StackSize = MFI->getStackSize(); + unsigned SlotSize = RegInfo->getSlotSize(); + bool HasFP = hasFP(MF); + bool IsWinEH = MF.getTarget().getMCAsmInfo()->usesWindowsCFI(); + int64_t FPDelta = 0; + + if (IsWinEH) { + uint64_t NumBytes = 0; + // Calculate required stack adjustment. + uint64_t FrameSize = StackSize - SlotSize; + // If required, include space for extra hidden slot for stashing base pointer. + if (X86FI->getRestoreBasePointer()) + FrameSize += SlotSize; + uint64_t SEHStackAllocAmt = StackSize; + if (RegInfo->needsStackRealignment(MF)) { + // Callee-saved registers are pushed on stack before the stack + // is realigned. + FrameSize -= CSSize; + + uint64_t MaxAlign = + calculateMaxStackAlign(MF); // Desired stack alignment. + NumBytes = RoundUpToAlignment(FrameSize, MaxAlign); + SEHStackAllocAmt = RoundUpToAlignment(SEHStackAllocAmt, 16); + } else { + NumBytes = FrameSize - CSSize; + } + uint64_t SEHFrameOffset = calculateSetFPREG(NumBytes); + // FPDelta is the offset from the "traditional" FP location of the old base + // pointer followed by return address and the location required by the + // restricted Win64 prologue. + // Add FPDelta to all offsets below that go through the frame pointer. + FPDelta = SEHStackAllocAmt - SEHFrameOffset; + } + if (RegInfo->hasBasePointer(MF)) { - assert (hasFP(MF) && "VLAs and dynamic stack realign, but no FP?!"); + assert(HasFP && "VLAs and dynamic stack realign, but no FP?!"); if (FI < 0) { // Skip the saved EBP. - return Offset + RegInfo->getSlotSize(); + return Offset + SlotSize + FPDelta; } else { assert((-(Offset + StackSize)) % MFI->getObjectAlignment(FI) == 0); return Offset + StackSize; @@ -1210,21 +1262,22 @@ } else if (RegInfo->needsStackRealignment(MF)) { if (FI < 0) { // Skip the saved EBP. - return Offset + RegInfo->getSlotSize(); + return Offset + SlotSize + FPDelta; } else { assert((-(Offset + StackSize)) % MFI->getObjectAlignment(FI) == 0); return Offset + StackSize; } // FIXME: Support tail calls } else { - if (!hasFP(MF)) + if (!HasFP) return Offset + StackSize; + if (IsWinEH) + return Offset + FPDelta; // Skip the saved EBP. - Offset += RegInfo->getSlotSize(); + Offset += SlotSize; // Skip the RETADDR move area - const X86MachineFunctionInfo *X86FI = MF.getInfo(); int TailCallReturnAddrDelta = X86FI->getTCReturnAddrDelta(); if (TailCallReturnAddrDelta < 0) Offset -= TailCallReturnAddrDelta; @@ -1959,8 +2012,8 @@ // We need to keep the stack aligned properly. To do this, we round the // amount of space needed for the outgoing arguments up to the next // alignment boundary. - unsigned StackAlign = STI.getFrameLowering()->getStackAlignment(); - Amount = (Amount + StackAlign - 1) / StackAlign * StackAlign; + unsigned StackAlign = getStackAlignment(); + Amount = RoundUpToAlignment(Amount, StackAlign); MachineInstr *New = nullptr; Index: test/CodeGen/X86/frameaddr.ll =================================================================== --- test/CodeGen/X86/frameaddr.ll +++ test/CodeGen/X86/frameaddr.ll @@ -1,7 +1,7 @@ ; RUN: llc < %s -march=x86 | FileCheck %s --check-prefix=CHECK-32 ; RUN: llc < %s -march=x86 -fast-isel -fast-isel-abort | FileCheck %s --check-prefix=CHECK-32 -; RUN: llc < %s -march=x86-64 | FileCheck %s --check-prefix=CHECK-64 -; RUN: llc < %s -march=x86-64 -fast-isel -fast-isel-abort | FileCheck %s --check-prefix=CHECK-64 +; RUN: llc < %s -mtriple=x86_64-unknown | FileCheck %s --check-prefix=CHECK-64 +; RUN: llc < %s -mtriple=x86_64-unknown -fast-isel -fast-isel-abort | FileCheck %s --check-prefix=CHECK-64 ; RUN: llc < %s -mtriple=x86_64-gnux32 | FileCheck %s --check-prefix=CHECK-X32ABI ; RUN: llc < %s -mtriple=x86_64-gnux32 -fast-isel -fast-isel-abort | FileCheck %s --check-prefix=CHECK-X32ABI ; RUN: llc < %s -mtriple=x86_64-nacl | FileCheck %s --check-prefix=CHECK-NACL64 Index: test/CodeGen/X86/gcc_except_table.ll =================================================================== --- test/CodeGen/X86/gcc_except_table.ll +++ test/CodeGen/X86/gcc_except_table.ll @@ -15,7 +15,7 @@ ; MINGW64: .seh_proc ; MINGW64: .seh_handler __gxx_personality_v0 -; MINGW64: .seh_setframe 5, 0 +; MINGW64: .seh_setframe 5, 32 ; MINGW64: callq _Unwind_Resume ; MINGW64: .seh_handlerdata ; MINGW64: GCC_except_table0: Index: test/CodeGen/X86/win64_alloca_dynalloca.ll =================================================================== --- test/CodeGen/X86/win64_alloca_dynalloca.ll +++ test/CodeGen/X86/win64_alloca_dynalloca.ll @@ -14,26 +14,24 @@ %buf0 = alloca i8, i64 4096, align 1 ; ___chkstk_ms does not adjust %rsp. -; M64: movq %rsp, %rbp ; M64: $4096, %rax ; M64: callq ___chkstk_ms ; M64: subq %rax, %rsp +; M64: leaq 128(%rsp), %rbp ; __chkstk does not adjust %rsp. -; W64: movq %rsp, %rbp ; W64: $4096, %rax ; W64: callq __chkstk ; W64: subq %rax, %rsp +; W64: leaq 128(%rsp), %rbp ; Use %r11 for the large model. -; L64: movq %rsp, %rbp ; L64: $4096, %rax ; L64: movabsq $__chkstk, %r11 ; L64: callq *%r11 ; L64: subq %rax, %rsp ; Freestanding -; EFI: movq %rsp, %rbp ; EFI: $[[B0OFS:4096|4104]], %rsp ; EFI-NOT: call @@ -68,12 +66,12 @@ ; M64: subq $48, %rsp ; M64: movq %rax, 32(%rsp) -; M64: leaq -4096(%rbp), %r9 +; M64: leaq -128(%rbp), %r9 ; M64: callq bar ; W64: subq $48, %rsp ; W64: movq %rax, 32(%rsp) -; W64: leaq -4096(%rbp), %r9 +; W64: leaq -128(%rbp), %r9 ; W64: callq bar ; EFI: subq $48, %rsp @@ -83,9 +81,9 @@ ret i64 %r -; M64: movq %rbp, %rsp +; M64: leaq 3968(%rbp), %rsp -; W64: movq %rbp, %rsp +; W64: leaq 3968(%rbp), %rsp } Index: test/CodeGen/X86/win64_alloca_dynalloca.s =================================================================== --- /dev/null +++ test/CodeGen/X86/win64_alloca_dynalloca.s @@ -0,0 +1,29 @@ + .text + .def unaligned; + .scl 2; + .type 32; + .endef + .globl unaligned + .align 16, 0x90 +unaligned: # @unaligned +# BB#0: # %entry + pushq %rbp + movabsq $4096, %rax # imm = 0x1000 + callq __chkstk + subq %rax, %rsp + leaq 128(%rsp), %rbp + leaq 15(%rcx), %rax + andq $-16, %rax + callq __chkstk + subq %rax, %rsp + movq %rsp, %rax + subq $48, %rsp + movq %rax, 32(%rsp) + leaq -128(%rbp), %r9 + movq %rcx, %r8 + callq bar + leaq 4016(%rbp), %rsp + popq %rbp + retq + + Index: test/CodeGen/X86/win64_eh.ll =================================================================== --- test/CodeGen/X86/win64_eh.ll +++ test/CodeGen/X86/win64_eh.ll @@ -146,23 +146,23 @@ ; WIN64: .seh_proc foo5 ; WIN64: pushq %rbp ; WIN64: .seh_pushreg 5 -; WIN64: movq %rsp, %rbp ; WIN64: pushq %rdi ; WIN64: .seh_pushreg 7 ; WIN64: pushq %rbx ; WIN64: .seh_pushreg 3 -; WIN64: andq $-64, %rsp ; WIN64: subq $128, %rsp -; WIN64: .seh_stackalloc 48 -; WIN64: .seh_setframe 5, 64 +; WIN64: .seh_stackalloc 128 +; WIN64: leaq 128(%rsp), %rbp +; WIN64: .seh_setframe 5, 128 ; WIN64: movaps %xmm7, -32(%rbp) # 16-byte Spill ; WIN64: movaps %xmm6, -48(%rbp) # 16-byte Spill -; WIN64: .seh_savexmm 6, 16 -; WIN64: .seh_savexmm 7, 32 +; WIN64: .seh_savexmm 6, 80 +; WIN64: .seh_savexmm 7, 96 ; WIN64: .seh_endprologue +; WIN64: andq $-64, %rsp ; WIN64: movaps -48(%rbp), %xmm6 # 16-byte Reload ; WIN64: movaps -32(%rbp), %xmm7 # 16-byte Reload -; WIN64: leaq -16(%rbp), %rsp +; WIN64: leaq (%rbp), %rsp ; WIN64: popq %rbx ; WIN64: popq %rdi ; WIN64: popq %rbp Index: test/CodeGen/X86/win64_eh.s =================================================================== --- /dev/null +++ test/CodeGen/X86/win64_eh.s @@ -0,0 +1,50 @@ + .text + .def foo5; + .scl 2; + .type 32; + .endef + .globl foo5 + .align 16, 0x90 +foo5: # @foo5 +.Ltmp0: +.seh_proc foo5 +# BB#0: # %entry + pushq %rbp +.Ltmp1: + .seh_pushreg 5 + pushq %rdi +.Ltmp2: + .seh_pushreg 7 + pushq %rbx +.Ltmp3: + .seh_pushreg 3 + subq $384, %rsp # imm = 0x180 +.Ltmp4: + .seh_stackalloc 384 + leaq 128(%rsp), %rbp +.Ltmp5: + .seh_setframe 5, 128 + movaps %xmm7, -32(%rbp) # 16-byte Spill + movaps %xmm6, -48(%rbp) # 16-byte Spill +.Ltmp6: + .seh_savexmm 6, 80 +.Ltmp7: + .seh_savexmm 7, 96 +.Ltmp8: + .seh_endprologue + andq $-64, %rsp + #APP + #NO_APP + movl $42, (%rsp) + movaps -48(%rbp), %xmm6 # 16-byte Reload + movaps -32(%rbp), %xmm7 # 16-byte Reload + leaq 256(%rbp), %rsp + popq %rbx + popq %rdi + popq %rbp + retq +.Leh_func_end0: +.Ltmp9: + .seh_endproc + + Index: test/CodeGen/X86/win64_frame.ll =================================================================== --- /dev/null +++ test/CodeGen/X86/win64_frame.ll @@ -0,0 +1,121 @@ +; RUN: llc < %s -mtriple=x86_64-pc-win32 | FileCheck %s + +define i32 @f1(i32 %p1, i32 %p2, i32 %p3, i32 %p4, i32 %p5) "no-frame-pointer-elim"="true" { + ; CHECK-LABEL: f1: + ; CHECK: movl 48(%rbp), %eax + ret i32 %p5 +} + +define void @f2(i32 %p, ...) "no-frame-pointer-elim"="true" { + ; CHECK-LABEL: f2: + ; CHECK: .seh_stackalloc 8 + ; CHECK: leaq 16(%rsp), %rbp + ; CHECK: .seh_setframe 5, 16 + ; CHECK: movq %rdx, 16(%rbp) + ; CHECK: leaq 16(%rbp), %rax + %ap = alloca i8, align 8 + call void @llvm.va_start(i8* %ap) + ret void +} + +define i8* @f3() "no-frame-pointer-elim"="true" { + ; CHECK-LABEL: f3: + ; CHECK: leaq (%rsp), %rbp + ; CHECK: .seh_setframe 5, 0 + ; CHECK: movq 8(%rbp), %rax + %ra = call i8* @llvm.returnaddress(i32 0) + ret i8* %ra +} + +define i8* @f4() "no-frame-pointer-elim"="true" { + ; CHECK-LABEL: f4: + ; CHECK: pushq %rbp + ; CHECK: .seh_pushreg 5 + ; CHECK: subq $304, %rsp + ; CHECK: .seh_stackalloc 304 + ; CHECK: leaq 128(%rsp), %rbp + ; CHECK: .seh_setframe 5, 128 + ; CHECK: .seh_endprologue + ; CHECK: movq 184(%rbp), %rax + alloca [300 x i8] + %ra = call i8* @llvm.returnaddress(i32 0) + ret i8* %ra +} + +declare void @external(i8*) + +define void @f5() "no-frame-pointer-elim"="true" { + ; CHECK-LABEL: f5: + ; CHECK: subq $336, %rsp + ; CHECK: .seh_stackalloc 336 + ; CHECK: leaq 128(%rsp), %rbp + ; CHECK: .seh_setframe 5, 128 + ; CHECK: leaq -92(%rbp), %rcx + ; CHECK: callq external + %a = alloca [300 x i8] + %gep = getelementptr [300 x i8]* %a, i32 0, i32 0 + call void @external(i8* %gep) + ret void +} + +define void @f6(i32 %p, ...) "no-frame-pointer-elim"="true" { + ; CHECK-LABEL: f6: + ; CHECK: subq $336, %rsp + ; CHECK: .seh_stackalloc 336 + ; CHECK: leaq 128(%rsp), %rbp + ; CHECK: .seh_setframe 5, 128 + ; CHECK: leaq -92(%rbp), %rcx + ; CHECK: callq external + %a = alloca [300 x i8] + %gep = getelementptr [300 x i8]* %a, i32 0, i32 0 + call void @external(i8* %gep) + ret void +} + +define i32 @f7(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) "no-frame-pointer-elim"="true" { + ; CHECK-LABEL: f7: + ; CHECK: pushq %rbp + ; CHECK: .seh_pushreg 5 + ; CHECK: subq $320, %rsp + ; CHECK: .seh_stackalloc 320 + ; CHECK: leaq 128(%rsp), %rbp + ; CHECK: .seh_setframe 5, 128 + ; CHECK: movl 240(%rbp), %eax + ; CHECK: leaq 192(%rbp), %rsp + alloca [300 x i8], align 64 + ret i32 %e +} + +define i32 @f8(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) "no-frame-pointer-elim"="true" { + ; CHECK-LABEL: f8: + ; CHECK: subq $384, %rsp + ; CHECK: .seh_stackalloc 384 + ; CHECK: leaq 128(%rsp), %rbp + ; CHECK: .seh_setframe 5, 128 + + %alloca = alloca [300 x i8], align 64 + ; CHECK: andq $-64, %rsp + ; CHECK: movq %rsp, %rbx + + alloca i32, i32 %a + ; CHECK: movl %ecx, %eax + ; CHECK: leaq 15(,%rax,4), %rax + ; CHECK: andq $-16, %rax + ; CHECK: callq __chkstk + ; CHECK: subq %rax, %rsp + + %gep = getelementptr [300 x i8]* %alloca, i32 0, i32 0 + call void @external(i8* %gep) + ; CHECK: subq $32, %rsp + ; CHECK: leaq (%rbx), %rcx + ; CHECK: callq external + ; CHECK: addq $32, %rsp + + ret i32 %e + ; CHECK: movl %esi, %eax + ; CHECK: leaq 256(%rbp), %rsp +} + +declare i8* @llvm.returnaddress(i32) nounwind readnone + +declare void @llvm.va_start(i8*) nounwind