Add method adjustAlignment so that stack slot alignments can be computed
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
diff --git a/include/llvm/Target/TargetFrameInfo.h b/include/llvm/Target/TargetFrameInfo.h
index 659955c..c6d2a94 100644
--- a/include/llvm/Target/TargetFrameInfo.h
+++ b/include/llvm/Target/TargetFrameInfo.h
@@ -19,7 +19,6 @@
public:
MachineFrameInfo(const TargetMachine& tgt) : target(tgt) {}
- //
// These methods provide constant parameters of the frame layout.
//
virtual int getStackFrameSizeAlignment () const = 0;
@@ -27,8 +26,15 @@
virtual int getNumFixedOutgoingArgs () const = 0;
virtual int getSizeOfEachArgOnStack () 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
// particular method. The frame contents are obtained from the
// MachineCodeInfoForMethod object for the given method.