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Add method adjustAlignment so that stack slot alignments can be computed

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in a target-dependent manner (because of the dang OFFSET in Sparc v9).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3745 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve 2002-09-16 15:57:43 +00:00
parent e102a64beb
commit aa500f3f43
1 changed files with 9 additions and 3 deletions
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8
include/llvm/Target/TargetFrameInfo.h
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@ -19,7 +19,6 @@ struct MachineFrameInfo : public NonCopyableV {
public: public:
MachineFrameInfo(const TargetMachine& tgt) : target(tgt) {} MachineFrameInfo(const TargetMachine& tgt) : target(tgt) {}
//
// These methods provide constant parameters of the frame layout. // These methods provide constant parameters of the frame layout.
// //
virtual int getStackFrameSizeAlignment () const = 0; virtual int getStackFrameSizeAlignment () const = 0;
@ -28,7 +27,14 @@ public:
virtual int getSizeOfEachArgOnStack () const = 0; virtual int getSizeOfEachArgOnStack () const = 0;
virtual bool argsOnStackHaveFixedSize () const = 0; virtual bool argsOnStackHaveFixedSize () const = 0;
// 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);
}
// These methods compute offsets using the frame contents for a // These methods compute offsets using the frame contents for a
// particular method. The frame contents are obtained from the // particular method. The frame contents are obtained from the
// MachineCodeInfoForMethod object for the given method. // MachineCodeInfoForMethod object for the given method.