[PATCH] D11654: Add a TargetMachine hook that verifies DataLayout compatibility

[Mehdi AMINI]

joker.eph updated this revision to Diff 31062.
joker.eph added a comment.

Remove the virtual keyword, we can bring it back when we'll have a use-case


http://reviews.llvm.org/D11654

Files:
  include/llvm/Target/TargetMachine.h
  lib/CodeGen/MachineFunction.cpp

Index: lib/CodeGen/MachineFunction.cpp
===================================================================
--- lib/CodeGen/MachineFunction.cpp
+++ lib/CodeGen/MachineFunction.cpp
@@ -85,6 +85,10 @@
 
   FunctionNumber = FunctionNum;
   JumpTableInfo = nullptr;
+
+  assert(TM.isCompatibleDataLayout(getDataLayout()) &&
+         "Can't create a MachineFunction using a Module with a "
+         "Target-incompatible DataLayout attached\n");
 }
 
 MachineFunction::~MachineFunction() {
Index: include/llvm/Target/TargetMachine.h
===================================================================
--- include/llvm/Target/TargetMachine.h
+++ include/llvm/Target/TargetMachine.h
@@ -133,6 +133,15 @@
   /// Create a DataLayout.
   const DataLayout createDataLayout() const { return DL; }
 
+  /// Test if a DataLayout if compatible with the CodeGen for this target.
+  ///
+  /// The LLVM Module owns a DataLayout that is used for the target independent
+  /// optimizations and code generation. This hook provides a target specific
+  /// check on the validity of this DataLayout.
+  bool isCompatibleDataLayout(const DataLayout &Candidate) const {
+    return DL == Candidate;
+  }
+
   /// Get the pointer size for this target.
   ///
   /// This is the only time the DataLayout in the TargetMachine is used.


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