Stack Alignment: move functions from header file MachineFrameInfo.h.
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
diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
index dc65eec..f13fe14 100644
--- a/lib/CodeGen/MachineFunction.cpp
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -445,6 +445,50 @@
// 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