Add an ID field to StackObjects

On AMDGPU SGPR spills are really spilled to another register.
The spiller creates the spills to new frame index objects,
which is used as a placeholder.

This will eventually be replaced with a reference to a position
in a VGPR to write to and the frame index deleted. It is
most likely not a real stack location that can be shared
with another stack object.

This is a problem when StackSlotColoring decides it should
combine a frame index used for a normal VGPR spill with
a real stack location and a frame index used for an SGPR.

Add an ID field so that StackSlotColoring has a way
of knowing the different frame index types are
incompatible.

llvm-svn: 308673

1 files changed, 3 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
index 78b57f3..d0b46c4 100644
--- a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
@@ -587,6 +587,7 @@ bool MIRParserImpl::initializeFrameInfo(PerFunctionMIParsingState &PFS,
     else
       ObjectIdx = MFI.CreateFixedSpillStackObject(Object.Size, Object.Offset);
     MFI.setObjectAlignment(ObjectIdx, Object.Alignment);
+    MFI.setStackID(ObjectIdx, Object.StackID);
     if (!PFS.FixedStackObjectSlots.insert(std::make_pair(Object.ID.Value,
                                                          ObjectIdx))
              .second)
@@ -619,6 +620,8 @@ bool MIRParserImpl::initializeFrameInfo(PerFunctionMIParsingState &PFS,
           Object.Size, Object.Alignment,
           Object.Type == yaml::MachineStackObject::SpillSlot, Alloca);
     MFI.setObjectOffset(ObjectIdx, Object.Offset);
+    MFI.setStackID(ObjectIdx, Object.StackID);
+
     if (!PFS.StackObjectSlots.insert(std::make_pair(Object.ID.Value, ObjectIdx))
              .second)
       return error(Object.ID.SourceRange.Start,