Describe stack-id as an enum

This patch changes MIR stack-id from an integer to an enum,
and adds printing/parsing support for this in MIR files. The default
stack-id '0' is now renamed to 'default'.

This should make MIR tests that have stack objects with different stack-ids
more descriptive. It also clarifies code operating on StackID.

Reviewers: arsenm, thegameg, qcolombet

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D60137

llvm-svn: 363533

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/MachineFrameInfo.cpp b/llvm/lib/CodeGen/MachineFrameInfo.cpp
index e8a3dda8..989a6a7 100644
--- a/llvm/lib/CodeGen/MachineFrameInfo.cpp
+++ b/llvm/lib/CodeGen/MachineFrameInfo.cpp
@@ -143,14 +143,14 @@ unsigned MachineFrameInfo::estimateStackSize(const MachineFunction &MF) const {
 
   for (int i = getObjectIndexBegin(); i != 0; ++i) {
     // Only estimate stack size of default stack.
-    if (getStackID(i))
+    if (getStackID(i) != TargetStackID::Default)
       continue;
     int FixedOff = -getObjectOffset(i);
     if (FixedOff > Offset) Offset = FixedOff;
   }
   for (unsigned i = 0, e = getObjectIndexEnd(); i != e; ++i) {
     // Only estimate stack size of live objects on default stack.
-    if (isDeadObjectIndex(i) || getStackID(i))
+    if (isDeadObjectIndex(i) || getStackID(i) != TargetStackID::Default)
       continue;
     Offset += getObjectSize(i);
     unsigned Align = getObjectAlignment(i);