From 2457f2c66184e978d4ed8fa9e2128effff26cb0b Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Sat, 22 May 2010 01:47:14 +0000 Subject: Implement @llvm.returnaddress. rdar://8015977. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104421 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/CodeGen/MachineFrameInfo.h | 11 +++++++++++ include/llvm/Target/TargetInstrInfo.h | 6 ++++-- 2 files changed, 15 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/llvm/CodeGen/MachineFrameInfo.h b/include/llvm/CodeGen/MachineFrameInfo.h index 25622c6..fe2c298 100644 --- a/include/llvm/CodeGen/MachineFrameInfo.h +++ b/include/llvm/CodeGen/MachineFrameInfo.h @@ -125,6 +125,10 @@ class MachineFrameInfo { /// to builtin \@llvm.frameaddress. bool FrameAddressTaken; + /// ReturnAddressTaken - This boolean keeps track of whether there is a call + /// to builtin \@llvm.returnaddress. + bool ReturnAddressTaken; + /// StackSize - The prolog/epilog code inserter calculates the final stack /// offsets for all of the fixed size objects, updating the Objects list /// above. It then updates StackSize to contain the number of bytes that need @@ -193,6 +197,7 @@ public: StackSize = NumFixedObjects = OffsetAdjustment = MaxAlignment = 0; HasVarSizedObjects = false; FrameAddressTaken = false; + ReturnAddressTaken = false; AdjustsStack = false; HasCalls = false; StackProtectorIdx = -1; @@ -223,6 +228,12 @@ public: bool isFrameAddressTaken() const { return FrameAddressTaken; } void setFrameAddressIsTaken(bool T) { FrameAddressTaken = T; } + /// isReturnAddressTaken - This method may be called any time after instruction + /// selection is complete to determine if there is a call to + /// \@llvm.returnaddress in this function. + bool isReturnAddressTaken() const { return ReturnAddressTaken; } + void setReturnAddressIsTaken(bool s) { ReturnAddressTaken = s; } + /// getObjectIndexBegin - Return the minimum frame object index. /// int getObjectIndexBegin() const { return -NumFixedObjects; } diff --git a/include/llvm/Target/TargetInstrInfo.h b/include/llvm/Target/TargetInstrInfo.h index 43005c0..2e5697e 100644 --- a/include/llvm/Target/TargetInstrInfo.h +++ b/include/llvm/Target/TargetInstrInfo.h @@ -352,7 +352,8 @@ public: /// storeRegToStackSlot(). Returns false otherwise. virtual bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, - const std::vector &CSI) const { + const std::vector &CSI, + const TargetRegisterInfo *TRI) const { return false; } @@ -362,7 +363,8 @@ public: /// Returns false otherwise. virtual bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, - const std::vector &CSI) const { + const std::vector &CSI, + const TargetRegisterInfo *TRI) const { return false; } -- cgit v1.1