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author | Michael J. Spencer <bigcheesegs@gmail.com> | 2010-10-21 01:41:01 +0000 |
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committer | Michael J. Spencer <bigcheesegs@gmail.com> | 2010-10-21 01:41:01 +0000 |
commit | e9c253e0bc01fd50bf788efb62093a5fa6ef5849 (patch) | |
tree | 21d1c5fc581b0862ac7e284917f1c64515091985 /lib/Target/X86/X86ISelLowering.cpp | |
parent | d6865de2d205d501e20d312ac66463be57dc44a1 (diff) | |
download | external_llvm-e9c253e0bc01fd50bf788efb62093a5fa6ef5849.zip external_llvm-e9c253e0bc01fd50bf788efb62093a5fa6ef5849.tar.gz external_llvm-e9c253e0bc01fd50bf788efb62093a5fa6ef5849.tar.bz2 |
X86: Add alloca probing to dynamic alloca on Windows. Fixes PR8424.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116984 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
-rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 55f66c8..d9b0ef2 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -424,7 +424,7 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM) setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand); if (Subtarget->is64Bit()) setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand); - if (Subtarget->isTargetCygMing()) + if (Subtarget->isTargetCygMing() || Subtarget->isTargetWindows()) setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom); else setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand); @@ -7483,8 +7483,8 @@ SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const { SDValue X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) const { - assert(Subtarget->isTargetCygMing() && - "This should be used only on Cygwin/Mingw targets"); + assert(Subtarget->isTargetCygMing() || Subtarget->isTargetWindows() && + "This should be used only on Windows targets"); DebugLoc dl = Op.getDebugLoc(); // Get the inputs. @@ -7501,7 +7501,7 @@ X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op, SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag); - Chain = DAG.getNode(X86ISD::MINGW_ALLOCA, dl, NodeTys, Chain, Flag); + Chain = DAG.getNode(X86ISD::WIN_ALLOCA, dl, NodeTys, Chain, Flag); Flag = Chain.getValue(1); Chain = DAG.getCopyFromReg(Chain, dl, X86StackPtr, SPTy).getValue(1); @@ -8911,7 +8911,7 @@ const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const { case X86ISD::PUNPCKHQDQ: return "X86ISD::PUNPCKHQDQ"; case X86ISD::VASTART_SAVE_XMM_REGS: return "X86ISD::VASTART_SAVE_XMM_REGS"; case X86ISD::VAARG_64: return "X86ISD::VAARG_64"; - case X86ISD::MINGW_ALLOCA: return "X86ISD::MINGW_ALLOCA"; + case X86ISD::WIN_ALLOCA: return "X86ISD::WIN_ALLOCA"; } } @@ -9874,7 +9874,7 @@ X86TargetLowering::EmitLoweredSelect(MachineInstr *MI, } MachineBasicBlock * -X86TargetLowering::EmitLoweredMingwAlloca(MachineInstr *MI, +X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI, MachineBasicBlock *BB) const { const TargetInstrInfo *TII = getTargetMachine().getInstrInfo(); DebugLoc DL = MI->getDebugLoc(); @@ -9884,8 +9884,11 @@ X86TargetLowering::EmitLoweredMingwAlloca(MachineInstr *MI, // FIXME: The code should be tweaked as soon as we'll try to do codegen for // mingw-w64. + const char *StackProbeSymbol = + Subtarget->isTargetWindows() ? "_chkstk" : "_alloca"; + BuildMI(*BB, MI, DL, TII->get(X86::CALLpcrel32)) - .addExternalSymbol("_alloca") + .addExternalSymbol(StackProbeSymbol) .addReg(X86::EAX, RegState::Implicit) .addReg(X86::ESP, RegState::Implicit) .addReg(X86::EAX, RegState::Define | RegState::Implicit) @@ -9952,8 +9955,8 @@ X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock *BB) const { switch (MI->getOpcode()) { default: assert(false && "Unexpected instr type to insert"); - case X86::MINGW_ALLOCA: - return EmitLoweredMingwAlloca(MI, BB); + case X86::WIN_ALLOCA: + return EmitLoweredWinAlloca(MI, BB); case X86::TLSCall_32: case X86::TLSCall_64: return EmitLoweredTLSCall(MI, BB); |