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don't repeat function / variable names in comments; NFC
llvm-svn: 240035
This commit is contained in:
Sanjay Patel
parent
708853c4e2
commit
314cd16f5d
@ -79,9 +79,9 @@ public:
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/// @brief Abstract Stack Frame Information
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class MachineFrameInfo {
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// StackObject - Represent a single object allocated on the stack.
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// Represent a single object allocated on the stack.
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struct StackObject {
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// SPOffset - The offset of this object from the stack pointer on entry to
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// The offset of this object from the stack pointer on entry to
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// the function. This field has no meaning for a variable sized element.
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int64_t SPOffset;
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@ -89,23 +89,23 @@ class MachineFrameInfo {
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// ~0ULL means a dead object.
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uint64_t Size;
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// Alignment - The required alignment of this stack slot.
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// The required alignment of this stack slot.
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unsigned Alignment;
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// isImmutable - If true, the value of the stack object is set before
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// If true, the value of the stack object is set before
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// entering the function and is not modified inside the function. By
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// default, fixed objects are immutable unless marked otherwise.
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bool isImmutable;
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// isSpillSlot - If true the stack object is used as spill slot. It
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// If true the stack object is used as spill slot. It
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// cannot alias any other memory objects.
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bool isSpillSlot;
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/// Alloca - If this stack object is originated from an Alloca instruction
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/// If this stack object is originated from an Alloca instruction
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/// this value saves the original IR allocation. Can be NULL.
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const AllocaInst *Alloca;
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// PreAllocated - If true, the object was mapped into the local frame
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// If true, the object was mapped into the local frame
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// block and doesn't need additional handling for allocation beyond that.
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bool PreAllocated;
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@ -121,51 +121,47 @@ class MachineFrameInfo {
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isSpillSlot(isSS), Alloca(Val), PreAllocated(false), isAliased(A) {}
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};
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/// StackAlignment - The alignment of the stack.
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/// The alignment of the stack.
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unsigned StackAlignment;
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/// StackRealignable - Can the stack be realigned.
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/// Can the stack be realigned.
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bool StackRealignable;
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/// Objects - The list of stack objects allocated...
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///
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/// The list of stack objects allocated.
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std::vector<StackObject> Objects;
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/// NumFixedObjects - This contains the number of fixed objects contained on
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/// This contains the number of fixed objects contained on
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/// the stack. Because fixed objects are stored at a negative index in the
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/// Objects list, this is also the index to the 0th object in the list.
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///
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unsigned NumFixedObjects;
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/// HasVarSizedObjects - This boolean keeps track of whether any variable
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/// This boolean keeps track of whether any variable
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/// sized objects have been allocated yet.
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///
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bool HasVarSizedObjects;
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/// FrameAddressTaken - This boolean keeps track of whether there is a call
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/// This boolean keeps track of whether there is a call
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/// to builtin \@llvm.frameaddress.
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bool FrameAddressTaken;
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/// ReturnAddressTaken - This boolean keeps track of whether there is a call
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/// This boolean keeps track of whether there is a call
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/// to builtin \@llvm.returnaddress.
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bool ReturnAddressTaken;
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/// HasStackMap - This boolean keeps track of whether there is a call
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/// This boolean keeps track of whether there is a call
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/// to builtin \@llvm.experimental.stackmap.
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bool HasStackMap;
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/// HasPatchPoint - This boolean keeps track of whether there is a call
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/// This boolean keeps track of whether there is a call
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/// to builtin \@llvm.experimental.patchpoint.
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bool HasPatchPoint;
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/// StackSize - The prolog/epilog code inserter calculates the final stack
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/// The prolog/epilog code inserter calculates the final stack
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/// offsets for all of the fixed size objects, updating the Objects list
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/// above. It then updates StackSize to contain the number of bytes that need
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/// to be allocated on entry to the function.
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///
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uint64_t StackSize;
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/// OffsetAdjustment - The amount that a frame offset needs to be adjusted to
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/// The amount that a frame offset needs to be adjusted to
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/// have the actual offset from the stack/frame pointer. The exact usage of
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/// this is target-dependent, but it is typically used to adjust between
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/// SP-relative and FP-relative offsets. E.G., if objects are accessed via
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@ -176,52 +172,49 @@ class MachineFrameInfo {
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/// corresponding adjustments are performed directly.
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int OffsetAdjustment;
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/// MaxAlignment - The prolog/epilog code inserter may process objects
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/// that require greater alignment than the default alignment the target
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/// provides. To handle this, MaxAlignment is set to the maximum alignment
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/// The prolog/epilog code inserter may process objects that require greater
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/// alignment than the default alignment the target provides.
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/// To handle this, MaxAlignment is set to the maximum alignment
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/// needed by the objects on the current frame. If this is greater than the
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/// native alignment maintained by the compiler, dynamic alignment code will
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/// be needed.
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///
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unsigned MaxAlignment;
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/// AdjustsStack - Set to true if this function adjusts the stack -- e.g.,
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/// Set to true if this function adjusts the stack -- e.g.,
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/// when calling another function. This is only valid during and after
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/// prolog/epilog code insertion.
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bool AdjustsStack;
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/// HasCalls - Set to true if this function has any function calls.
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/// Set to true if this function has any function calls.
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bool HasCalls;
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/// StackProtectorIdx - The frame index for the stack protector.
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/// The frame index for the stack protector.
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int StackProtectorIdx;
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/// FunctionContextIdx - The frame index for the function context. Used for
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/// SjLj exceptions.
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/// The frame index for the function context. Used for SjLj exceptions.
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int FunctionContextIdx;
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/// MaxCallFrameSize - This contains the size of the largest call frame if the
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/// target uses frame setup/destroy pseudo instructions (as defined in the
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/// TargetFrameInfo class). This information is important for frame pointer
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/// elimination. If is only valid during and after prolog/epilog code
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/// insertion.
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///
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/// This contains the size of the largest call frame if the target uses frame
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/// setup/destroy pseudo instructions (as defined in the TargetFrameInfo
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/// class). This information is important for frame pointer elimination.
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/// If is only valid during and after prolog/epilog code insertion.
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unsigned MaxCallFrameSize;
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/// CSInfo - The prolog/epilog code inserter fills in this vector with each
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/// The prolog/epilog code inserter fills in this vector with each
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/// callee saved register saved in the frame. Beyond its use by the prolog/
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/// epilog code inserter, this data used for debug info and exception
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/// handling.
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std::vector<CalleeSavedInfo> CSInfo;
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/// CSIValid - Has CSInfo been set yet?
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/// Has CSInfo been set yet?
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bool CSIValid;
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/// LocalFrameObjects - References to frame indices which are mapped
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/// References to frame indices which are mapped
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/// into the local frame allocation block. <FrameIdx, LocalOffset>
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SmallVector<std::pair<int, int64_t>, 32> LocalFrameObjects;
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/// LocalFrameSize - Size of the pre-allocated local frame block.
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/// Size of the pre-allocated local frame block.
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int64_t LocalFrameSize;
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/// Required alignment of the local object blob, which is the strictest
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@ -284,101 +277,90 @@ public:
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HasTailCall = false;
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}
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/// hasStackObjects - Return true if there are any stack objects in this
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/// function.
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///
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/// Return true if there are any stack objects in this function.
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bool hasStackObjects() const { return !Objects.empty(); }
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/// hasVarSizedObjects - This method may be called any time after instruction
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/// This method may be called any time after instruction
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/// selection is complete to determine if the stack frame for this function
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/// contains any variable sized objects.
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///
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bool hasVarSizedObjects() const { return HasVarSizedObjects; }
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/// getStackProtectorIndex/setStackProtectorIndex - Return the index for the
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/// stack protector object.
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///
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/// Return the index for the stack protector object.
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int getStackProtectorIndex() const { return StackProtectorIdx; }
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void setStackProtectorIndex(int I) { StackProtectorIdx = I; }
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/// getFunctionContextIndex/setFunctionContextIndex - Return the index for the
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/// function context object. This object is used for SjLj exceptions.
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/// Return the index for the function context object.
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/// This object is used for SjLj exceptions.
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int getFunctionContextIndex() const { return FunctionContextIdx; }
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void setFunctionContextIndex(int I) { FunctionContextIdx = I; }
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/// isFrameAddressTaken - This method may be called any time after instruction
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/// This method may be called any time after instruction
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/// selection is complete to determine if there is a call to
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/// \@llvm.frameaddress in this function.
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bool isFrameAddressTaken() const { return FrameAddressTaken; }
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void setFrameAddressIsTaken(bool T) { FrameAddressTaken = T; }
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/// isReturnAddressTaken - This method may be called any time after
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/// This method may be called any time after
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/// instruction selection is complete to determine if there is a call to
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/// \@llvm.returnaddress in this function.
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bool isReturnAddressTaken() const { return ReturnAddressTaken; }
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void setReturnAddressIsTaken(bool s) { ReturnAddressTaken = s; }
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/// hasStackMap - This method may be called any time after instruction
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/// This method may be called any time after instruction
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/// selection is complete to determine if there is a call to builtin
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/// \@llvm.experimental.stackmap.
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bool hasStackMap() const { return HasStackMap; }
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void setHasStackMap(bool s = true) { HasStackMap = s; }
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/// hasPatchPoint - This method may be called any time after instruction
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/// This method may be called any time after instruction
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/// selection is complete to determine if there is a call to builtin
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/// \@llvm.experimental.patchpoint.
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bool hasPatchPoint() const { return HasPatchPoint; }
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void setHasPatchPoint(bool s = true) { HasPatchPoint = s; }
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/// getObjectIndexBegin - Return the minimum frame object index.
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///
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/// Return the minimum frame object index.
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int getObjectIndexBegin() const { return -NumFixedObjects; }
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/// getObjectIndexEnd - Return one past the maximum frame object index.
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///
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/// Return one past the maximum frame object index.
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int getObjectIndexEnd() const { return (int)Objects.size()-NumFixedObjects; }
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/// getNumFixedObjects - Return the number of fixed objects.
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/// Return the number of fixed objects.
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unsigned getNumFixedObjects() const { return NumFixedObjects; }
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/// getNumObjects - Return the number of objects.
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///
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/// Return the number of objects.
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unsigned getNumObjects() const { return Objects.size(); }
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/// mapLocalFrameObject - Map a frame index into the local object block
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/// Map a frame index into the local object block
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void mapLocalFrameObject(int ObjectIndex, int64_t Offset) {
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LocalFrameObjects.push_back(std::pair<int, int64_t>(ObjectIndex, Offset));
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Objects[ObjectIndex + NumFixedObjects].PreAllocated = true;
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}
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/// getLocalFrameObjectMap - Get the local offset mapping for a for an object
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/// Get the local offset mapping for a for an object.
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std::pair<int, int64_t> getLocalFrameObjectMap(int i) {
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assert (i >= 0 && (unsigned)i < LocalFrameObjects.size() &&
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"Invalid local object reference!");
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return LocalFrameObjects[i];
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}
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/// getLocalFrameObjectCount - Return the number of objects allocated into
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/// the local object block.
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/// Return the number of objects allocated into the local object block.
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int64_t getLocalFrameObjectCount() { return LocalFrameObjects.size(); }
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/// setLocalFrameSize - Set the size of the local object blob.
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/// Set the size of the local object blob.
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void setLocalFrameSize(int64_t sz) { LocalFrameSize = sz; }
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/// getLocalFrameSize - Get the size of the local object blob.
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/// Get the size of the local object blob.
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int64_t getLocalFrameSize() const { return LocalFrameSize; }
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/// setLocalFrameMaxAlign - Required alignment of the local object blob,
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/// Required alignment of the local object blob,
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/// which is the strictest alignment of any object in it.
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void setLocalFrameMaxAlign(unsigned Align) { LocalFrameMaxAlign = Align; }
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/// getLocalFrameMaxAlign - Return the required alignment of the local
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/// object blob.
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/// Return the required alignment of the local object blob.
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unsigned getLocalFrameMaxAlign() const { return LocalFrameMaxAlign; }
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/// getUseLocalStackAllocationBlock - Get whether the local allocation blob
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/// should be allocated together or let PEI allocate the locals in it
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/// directly.
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/// Get whether the local allocation blob should be allocated together or
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/// let PEI allocate the locals in it directly.
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bool getUseLocalStackAllocationBlock() {return UseLocalStackAllocationBlock;}
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/// setUseLocalStackAllocationBlock - Set whether the local allocation blob
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@ -388,30 +370,28 @@ public:
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UseLocalStackAllocationBlock = v;
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}
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/// isObjectPreAllocated - Return true if the object was pre-allocated into
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/// the local block.
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/// Return true if the object was pre-allocated into the local block.
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bool isObjectPreAllocated(int ObjectIdx) const {
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assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
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"Invalid Object Idx!");
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return Objects[ObjectIdx+NumFixedObjects].PreAllocated;
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}
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/// getObjectSize - Return the size of the specified object.
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///
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/// Return the size of the specified object.
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int64_t getObjectSize(int ObjectIdx) const {
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assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
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"Invalid Object Idx!");
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return Objects[ObjectIdx+NumFixedObjects].Size;
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}
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/// setObjectSize - Change the size of the specified stack object.
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/// Change the size of the specified stack object.
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void setObjectSize(int ObjectIdx, int64_t Size) {
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assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
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"Invalid Object Idx!");
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Objects[ObjectIdx+NumFixedObjects].Size = Size;
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}
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/// getObjectAlignment - Return the alignment of the specified stack object.
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/// Return the alignment of the specified stack object.
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unsigned getObjectAlignment(int ObjectIdx) const {
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assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
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"Invalid Object Idx!");
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@ -426,7 +406,7 @@ public:
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ensureMaxAlignment(Align);
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}
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/// getObjectAllocation - Return the underlying Alloca of the specified
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/// Return the underlying Alloca of the specified
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/// stack object if it exists. Returns 0 if none exists.
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const AllocaInst* getObjectAllocation(int ObjectIdx) const {
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assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
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@ -434,9 +414,8 @@ public:
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return Objects[ObjectIdx+NumFixedObjects].Alloca;
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}
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/// getObjectOffset - Return the assigned stack offset of the specified object
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/// Return the assigned stack offset of the specified object
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/// from the incoming stack pointer.
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///
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int64_t getObjectOffset(int ObjectIdx) const {
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assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
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"Invalid Object Idx!");
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@ -445,9 +424,8 @@ public:
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return Objects[ObjectIdx+NumFixedObjects].SPOffset;
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}
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/// setObjectOffset - Set the stack frame offset of the specified object. The
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/// Set the stack frame offset of the specified object. The
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/// offset is relative to the stack pointer on entry to the function.
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///
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void setObjectOffset(int ObjectIdx, int64_t SPOffset) {
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assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
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"Invalid Object Idx!");
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@ -456,44 +434,37 @@ public:
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Objects[ObjectIdx+NumFixedObjects].SPOffset = SPOffset;
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}
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/// getStackSize - Return the number of bytes that must be allocated to hold
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/// Return the number of bytes that must be allocated to hold
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/// all of the fixed size frame objects. This is only valid after
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/// Prolog/Epilog code insertion has finalized the stack frame layout.
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///
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uint64_t getStackSize() const { return StackSize; }
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/// setStackSize - Set the size of the stack...
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///
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/// Set the size of the stack.
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void setStackSize(uint64_t Size) { StackSize = Size; }
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/// Estimate and return the size of the stack frame.
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unsigned estimateStackSize(const MachineFunction &MF) const;
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/// getOffsetAdjustment - Return the correction for frame offsets.
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///
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/// Return the correction for frame offsets.
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int getOffsetAdjustment() const { return OffsetAdjustment; }
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/// setOffsetAdjustment - Set the correction for frame offsets.
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///
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/// Set the correction for frame offsets.
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void setOffsetAdjustment(int Adj) { OffsetAdjustment = Adj; }
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/// getMaxAlignment - Return the alignment in bytes that this function must be
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/// aligned to, which is greater than the default stack alignment provided by
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/// the target.
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///
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/// Return the alignment in bytes that this function must be aligned to,
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/// which is greater than the default stack alignment provided by the target.
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unsigned getMaxAlignment() const { return MaxAlignment; }
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/// ensureMaxAlignment - Make sure the function is at least Align bytes
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/// aligned.
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/// Make sure the function is at least Align bytes aligned.
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void ensureMaxAlignment(unsigned Align);
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/// AdjustsStack - Return true if this function adjusts the stack -- e.g.,
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/// Return true if this function adjusts the stack -- e.g.,
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/// when calling another function. This is only valid during and after
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/// prolog/epilog code insertion.
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bool adjustsStack() const { return AdjustsStack; }
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void setAdjustsStack(bool V) { AdjustsStack = V; }
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/// hasCalls - Return true if the current function has any function calls.
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/// Return true if the current function has any function calls.
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bool hasCalls() const { return HasCalls; }
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void setHasCalls(bool V) { HasCalls = V; }
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@ -513,7 +484,7 @@ public:
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bool hasTailCall() const { return HasTailCall; }
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void setHasTailCall() { HasTailCall = true; }
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/// getMaxCallFrameSize - Return the maximum size of a call frame that must be
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/// Return the maximum size of a call frame that must be
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/// allocated for an outgoing function call. This is only available if
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/// CallFrameSetup/Destroy pseudo instructions are used by the target, and
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/// then only during or after prolog/epilog code insertion.
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@ -521,25 +492,23 @@ public:
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unsigned getMaxCallFrameSize() const { return MaxCallFrameSize; }
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void setMaxCallFrameSize(unsigned S) { MaxCallFrameSize = S; }
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/// CreateFixedObject - Create a new object at a fixed location on the stack.
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/// Create a new object at a fixed location on the stack.
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/// All fixed objects should be created before other objects are created for
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/// efficiency. By default, fixed objects are not pointed to by LLVM IR
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/// values. This returns an index with a negative value.
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///
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int CreateFixedObject(uint64_t Size, int64_t SPOffset, bool Immutable,
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bool isAliased = false);
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/// CreateFixedSpillStackObject - Create a spill slot at a fixed location
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/// on the stack. Returns an index with a negative value.
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||||
/// Create a spill slot at a fixed location on the stack.
|
||||
/// Returns an index with a negative value.
|
||||
int CreateFixedSpillStackObject(uint64_t Size, int64_t SPOffset);
|
||||
|
||||
/// isFixedObjectIndex - Returns true if the specified index corresponds to a
|
||||
/// fixed stack object.
|
||||
/// Returns true if the specified index corresponds to a fixed stack object.
|
||||
bool isFixedObjectIndex(int ObjectIdx) const {
|
||||
return ObjectIdx < 0 && (ObjectIdx >= -(int)NumFixedObjects);
|
||||
}
|
||||
|
||||
/// isAliasedObjectIndex - Returns true if the specified index corresponds
|
||||
/// Returns true if the specified index corresponds
|
||||
/// to an object that might be pointed to by an LLVM IR value.
|
||||
bool isAliasedObjectIndex(int ObjectIdx) const {
|
||||
assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
|
||||
@ -558,61 +527,52 @@ public:
|
||||
return Objects[ObjectIdx+NumFixedObjects].isImmutable;
|
||||
}
|
||||
|
||||
/// isSpillSlotObjectIndex - Returns true if the specified index corresponds
|
||||
/// to a spill slot..
|
||||
/// Returns true if the specified index corresponds to a spill slot.
|
||||
bool isSpillSlotObjectIndex(int ObjectIdx) const {
|
||||
assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
|
||||
"Invalid Object Idx!");
|
||||
return Objects[ObjectIdx+NumFixedObjects].isSpillSlot;
|
||||
}
|
||||
|
||||
/// isDeadObjectIndex - Returns true if the specified index corresponds to
|
||||
/// a dead object.
|
||||
/// Returns true if the specified index corresponds to a dead object.
|
||||
bool isDeadObjectIndex(int ObjectIdx) const {
|
||||
assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
|
||||
"Invalid Object Idx!");
|
||||
return Objects[ObjectIdx+NumFixedObjects].Size == ~0ULL;
|
||||
}
|
||||
|
||||
/// CreateStackObject - Create a new statically sized stack object, returning
|
||||
/// Create a new statically sized stack object, returning
|
||||
/// a nonnegative identifier to represent it.
|
||||
///
|
||||
int CreateStackObject(uint64_t Size, unsigned Alignment, bool isSS,
|
||||
const AllocaInst *Alloca = nullptr);
|
||||
|
||||
/// CreateSpillStackObject - Create a new statically sized stack object that
|
||||
/// represents a spill slot, returning a nonnegative identifier to represent
|
||||
/// it.
|
||||
///
|
||||
/// Create a new statically sized stack object that represents a spill slot,
|
||||
/// returning a nonnegative identifier to represent it.
|
||||
int CreateSpillStackObject(uint64_t Size, unsigned Alignment);
|
||||
|
||||
/// RemoveStackObject - Remove or mark dead a statically sized stack object.
|
||||
///
|
||||
/// Remove or mark dead a statically sized stack object.
|
||||
void RemoveStackObject(int ObjectIdx) {
|
||||
// Mark it dead.
|
||||
Objects[ObjectIdx+NumFixedObjects].Size = ~0ULL;
|
||||
}
|
||||
|
||||
/// CreateVariableSizedObject - Notify the MachineFrameInfo object that a
|
||||
/// variable sized object has been created. This must be created whenever a
|
||||
/// variable sized object is created, whether or not the index returned is
|
||||
/// actually used.
|
||||
///
|
||||
/// Notify the MachineFrameInfo object that a variable sized object has been
|
||||
/// created. This must be created whenever a variable sized object is
|
||||
/// created, whether or not the index returned is actually used.
|
||||
int CreateVariableSizedObject(unsigned Alignment, const AllocaInst *Alloca);
|
||||
|
||||
/// getCalleeSavedInfo - Returns a reference to call saved info vector for the
|
||||
/// current function.
|
||||
/// Returns a reference to call saved info vector for the current function.
|
||||
const std::vector<CalleeSavedInfo> &getCalleeSavedInfo() const {
|
||||
return CSInfo;
|
||||
}
|
||||
|
||||
/// setCalleeSavedInfo - Used by prolog/epilog inserter to set the function's
|
||||
/// callee saved information.
|
||||
/// Used by prolog/epilog inserter to set the function's callee saved
|
||||
/// information.
|
||||
void setCalleeSavedInfo(const std::vector<CalleeSavedInfo> &CSI) {
|
||||
CSInfo = CSI;
|
||||
}
|
||||
|
||||
/// isCalleeSavedInfoValid - Has the callee saved info been calculated yet?
|
||||
/// Has the callee saved info been calculated yet?
|
||||
bool isCalleeSavedInfoValid() const { return CSIValid; }
|
||||
|
||||
void setCalleeSavedInfoValid(bool v) { CSIValid = v; }
|
||||
@ -632,9 +592,8 @@ public:
|
||||
/// method always returns an empty set.
|
||||
BitVector getPristineRegs(const MachineFunction &MF) const;
|
||||
|
||||
/// print - Used by the MachineFunction printer to print information about
|
||||
/// stack objects. Implemented in MachineFunction.cpp
|
||||
///
|
||||
/// Used by the MachineFunction printer to print information about
|
||||
/// stack objects. Implemented in MachineFunction.cpp.
|
||||
void print(const MachineFunction &MF, raw_ostream &OS) const;
|
||||
|
||||
/// dump - Print the function to stderr.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user