[MIR] Add support for debug metadata for fixed stack objects

Debug var, expr and loc were only supported for non-fixed stack objects.

This patch adds the following fields to the "fixedStack:" entries, and
renames the ones from "stack:" to:

* debug-info-variable
* debug-info-expression
* debug-info-location

Differential Revision: https://reviews.llvm.org/D46032

llvm-svn: 330859

1 files changed, 7 insertions, 4 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
index 378102403b3..3d2db97acb4 100644
--- a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
@@ -122,8 +122,9 @@ public:
                                 const yaml::StringValue &RegisterSource,
                                 bool IsRestored, int FrameIdx);
 
+  template <typename T>
   bool parseStackObjectsDebugInfo(PerFunctionMIParsingState &PFS,
-                                  const yaml::MachineStackObject &Object,
+                                  const T &Object,
                                   int FrameIdx);
 
   bool initializeConstantPool(PerFunctionMIParsingState &PFS,
@@ -616,6 +617,8 @@ bool MIRParserImpl::initializeFrameInfo(PerFunctionMIParsingState &PFS,
     if (parseCalleeSavedRegister(PFS, CSIInfo, Object.CalleeSavedRegister,
                                  Object.CalleeSavedRestored, ObjectIdx))
       return true;
+    if (parseStackObjectsDebugInfo(PFS, Object, ObjectIdx))
+      return true;
   }
 
   // Initialize the ordinary frame objects.
@@ -700,11 +703,11 @@ static bool typecheckMDNode(T *&Result, MDNode *Node,
   return false;
 }
 
+template <typename T>
 bool MIRParserImpl::parseStackObjectsDebugInfo(PerFunctionMIParsingState &PFS,
-    const yaml::MachineStackObject &Object, int FrameIdx) {
+    const T &Object, int FrameIdx) {
   // Debug information can only be attached to stack objects; Fixed stack
   // objects aren't supported.
-  assert(FrameIdx >= 0 && "Expected a stack object frame index");
   MDNode *Var = nullptr, *Expr = nullptr, *Loc = nullptr;
   if (parseMDNode(PFS, Var, Object.DebugVar) ||
       parseMDNode(PFS, Expr, Object.DebugExpr) ||
@@ -719,7 +722,7 @@ bool MIRParserImpl::parseStackObjectsDebugInfo(PerFunctionMIParsingState &PFS,
       typecheckMDNode(DIExpr, Expr, Object.DebugExpr, "DIExpression", *this) ||
       typecheckMDNode(DILoc, Loc, Object.DebugLoc, "DILocation", *this))
     return true;
-  PFS.MF.setVariableDbgInfo(DIVar, DIExpr, unsigned(FrameIdx), DILoc);
+  PFS.MF.setVariableDbgInfo(DIVar, DIExpr, FrameIdx, DILoc);
   return false;
 }