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author | Chris Lattner <sabre@nondot.org> | 2002-12-28 20:12:10 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2002-12-28 20:12:10 +0000 |
commit | fd529d2e4aed9a455d539962248fda8583d6ba8e (patch) | |
tree | 366552aa156612ea76b397948d755741824ff94c /include/llvm/Target/TargetFrameInfo.h | |
parent | f9b332b59d1c008268551572557dca6ab6028a4d (diff) | |
download | external_llvm-fd529d2e4aed9a455d539962248fda8583d6ba8e.zip external_llvm-fd529d2e4aed9a455d539962248fda8583d6ba8e.tar.gz external_llvm-fd529d2e4aed9a455d539962248fda8583d6ba8e.tar.bz2 |
Expose some very simple information about the frame, rather than in-depth
target specific information. Rename MachineFrameInfo to TargetFrameInfo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5168 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Target/TargetFrameInfo.h')
-rw-r--r-- | include/llvm/Target/TargetFrameInfo.h | 111 |
1 files changed, 65 insertions, 46 deletions
diff --git a/include/llvm/Target/TargetFrameInfo.h b/include/llvm/Target/TargetFrameInfo.h index 699966a..dd17eab 100644 --- a/include/llvm/Target/TargetFrameInfo.h +++ b/include/llvm/Target/TargetFrameInfo.h @@ -1,76 +1,95 @@ -//===-- llvm/CodeGen/MachineFrameInfo.h -------------------------*- C++ -*-===// +//===-- llvm/Target/TargetFrameInfo.h ---------------------------*- C++ -*-===// // -// Interface to layout of stack frame on target machine. +// Interface to describe the layout of a stack frame on the target machine. // //===----------------------------------------------------------------------===// -#ifndef LLVM_CODEGEN_FRAMEINFO_H -#define LLVM_CODEGEN_FRAMEINFO_H - -#include "Support/NonCopyable.h" -#include <vector> +#ifndef LLVM_TARGET_TARGETFRAMEINFO_H +#define LLVM_TARGET_TARGETFRAMEINFO_H class MachineFunction; -class TargetMachine; -struct MachineFrameInfo : public NonCopyableV { - const TargetMachine ⌖ - +struct TargetFrameInfo { + enum StackDirection { + StackGrowsUp, // Adding to the stack increases the stack address + StackGrowsDown // Adding to the stack decreases the stack address + }; +private: + StackDirection StackDir; + unsigned StackAlignment; + int LocalAreaOffset; public: - MachineFrameInfo(const TargetMachine& tgt) : target(tgt) {} - - // These methods provide constant parameters of the frame layout. - // - virtual int getStackFrameSizeAlignment () const = 0; - virtual int getMinStackFrameSize () const = 0; - virtual int getNumFixedOutgoingArgs () const = 0; - virtual int getSizeOfEachArgOnStack () const = 0; - virtual bool argsOnStackHaveFixedSize () const = 0; + TargetFrameInfo(StackDirection D, unsigned StackAl, int LAO) + : StackDir(D), StackAlignment(StackAl), LocalAreaOffset(LAO) {} + + // These methods return information that describes the abstract stack layout + // of the target machine. + + /// getStackGrowthDirection - Return the direction the stack grows + /// + StackDirection getStackGrowthDirection() const { return StackDir; } + + /// getStackAlignment - This method returns the number of bytes that the stack + /// pointer must be aligned to. Typically, this is the largest alignment for + /// any data object in the target. + /// + unsigned getStackAlignment() const { return StackAlignment; } + + /// getOffsetOfLocalArea - This method returns the offset of the local area + /// from the stack pointer on entrance to a function. + /// + int getOffsetOfLocalArea() const { return LocalAreaOffset; } + + //===--------------------------------------------------------------------===// + // These methods provide details of the stack frame used by Sparc, thus they + // are Sparc specific. + //===--------------------------------------------------------------------===// + + virtual int getStackFrameSizeAlignment () const { abort(); } + virtual int getMinStackFrameSize () const { abort(); } + virtual int getNumFixedOutgoingArgs () const { abort(); } + virtual int getSizeOfEachArgOnStack () const { abort(); } + virtual bool argsOnStackHaveFixedSize () const { abort(); } // This method adjusts a stack offset to meet alignment rules of target. - // - virtual int adjustAlignment (int unalignedOffset, - bool growUp, - unsigned int align) const { - return unalignedOffset + (growUp? +1:-1)*(unalignedOffset % align); - } + virtual int adjustAlignment(int unalignedOffset, bool growUp, + unsigned align) const { abort(); } - // These methods compute offsets using the frame contents for a - // particular method. The frame contents are obtained from the - // MachineCodeInfoForMethod object for the given method. - // The first few methods have default machine-independent implementations. - // The rest must be implemented by the machine-specific subclass. + // These methods compute offsets using the frame contents for a particular + // function. The frame contents are obtained from the MachineFunction object + // for the given function. The rest must be implemented by the + // machine-specific subclass. // virtual int getIncomingArgOffset (MachineFunction& mcInfo, - unsigned argNum) const; + unsigned argNum)const{abort();} virtual int getOutgoingArgOffset (MachineFunction& mcInfo, - unsigned argNum) const; + unsigned argNum)const{abort();} virtual int getFirstIncomingArgOffset (MachineFunction& mcInfo, - bool& growUp) const=0; + bool& growUp) const { abort();} virtual int getFirstOutgoingArgOffset (MachineFunction& mcInfo, - bool& growUp) const=0; + bool& growUp) const {abort();} virtual int getFirstOptionalOutgoingArgOffset (MachineFunction&, - bool& growUp) const=0; + bool& growUp) const {abort();} virtual int getFirstAutomaticVarOffset (MachineFunction& mcInfo, - bool& growUp) const=0; + bool& growUp) const {abort();} virtual int getRegSpillAreaOffset (MachineFunction& mcInfo, - bool& growUp) const=0; + bool& growUp) const {abort();} virtual int getTmpAreaOffset (MachineFunction& mcInfo, - bool& growUp) const=0; + bool& growUp) const {abort();} virtual int getDynamicAreaOffset (MachineFunction& mcInfo, - bool& growUp) const=0; + bool& growUp) const {abort();} // // These methods specify the base register used for each stack area // (generally FP or SP) // - virtual int getIncomingArgBaseRegNum() const=0; - virtual int getOutgoingArgBaseRegNum() const=0; - virtual int getOptionalOutgoingArgBaseRegNum() const=0; - virtual int getAutomaticVarBaseRegNum() const=0; - virtual int getRegSpillAreaBaseRegNum() const=0; - virtual int getDynamicAreaBaseRegNum() const=0; + virtual int getIncomingArgBaseRegNum() const { abort(); } + virtual int getOutgoingArgBaseRegNum() const { abort(); } + virtual int getOptionalOutgoingArgBaseRegNum() const { abort(); } + virtual int getAutomaticVarBaseRegNum() const { abort(); } + virtual int getRegSpillAreaBaseRegNum() const { abort(); } + virtual int getDynamicAreaBaseRegNum() const { abort(); } }; #endif |