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Stack Alignment: move functions from header file MachineFrameInfo.h.

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No functional change for this commit. The follow-up patch will add more stuff to
these functions.

rdar://12713765


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169186 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Manman Ren
2012-12-04 00:26:44 +00:00
parent 4af1ca5229
commit dc8126bbb8
2 changed files with 48 additions and 24 deletions
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44
lib/CodeGen/MachineFunction.cpp
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@ -445,6 +445,50 @@ MCSymbol *MachineFunction::getPICBaseSymbol() const {
// MachineFrameInfo implementation
//===----------------------------------------------------------------------===//
/// ensureMaxAlignment - Make sure the function is at least Align bytes
/// aligned.
void MachineFrameInfo::ensureMaxAlignment(unsigned Align) {
if (MaxAlignment < Align) MaxAlignment = Align;
}
/// CreateStackObject - Create a new statically sized stack object, returning
/// a nonnegative identifier to represent it.
///
int MachineFrameInfo::CreateStackObject(uint64_t Size, unsigned Alignment,
bool isSS, bool MayNeedSP, const AllocaInst *Alloca) {
assert(Size != 0 && "Cannot allocate zero size stack objects!");
Objects.push_back(StackObject(Size, Alignment, 0, false, isSS, MayNeedSP,
Alloca));
int Index = (int)Objects.size() - NumFixedObjects - 1;
assert(Index >= 0 && "Bad frame index!");
ensureMaxAlignment(Alignment);
return Index;
}
/// CreateSpillStackObject - Create a new statically sized stack object that
/// represents a spill slot, returning a nonnegative identifier to represent
/// it.
///
int MachineFrameInfo::CreateSpillStackObject(uint64_t Size,
unsigned Alignment) {
CreateStackObject(Size, Alignment, true, false);
int Index = (int)Objects.size() - NumFixedObjects - 1;
ensureMaxAlignment(Alignment);
return Index;
}
/// 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.
///
int MachineFrameInfo::CreateVariableSizedObject(unsigned Alignment) {
HasVarSizedObjects = true;
Objects.push_back(StackObject(0, Alignment, 0, false, false, true, 0));
ensureMaxAlignment(Alignment);
return (int)Objects.size()-NumFixedObjects-1;
}
/// CreateFixedObject - Create a new object at a fixed location on the stack.
/// All fixed objects should be created before other objects are created for
/// efficiency. By default, fixed objects are immutable. This returns an