1 files changed, 23 insertions, 5 deletions
diff --git a/include/llvm/CodeGen/Analysis.h b/include/llvm/CodeGen/Analysis.h
index b791ba09adaf5..c4b94ede4f559 100644
--- a/include/llvm/CodeGen/Analysis.h
+++ b/include/llvm/CodeGen/Analysis.h
@@ -22,7 +22,7 @@
 #include "llvm/IR/Instructions.h"
 
 namespace llvm {
-class GlobalVariable;
+class GlobalValue;
 class TargetLoweringBase;
 class TargetLowering;
 class TargetMachine;
@@ -31,10 +31,21 @@ class SDValue;
 class SelectionDAG;
 struct EVT;
 
-/// ComputeLinearIndex - Given an LLVM IR aggregate type and a sequence
-/// of insertvalue or extractvalue indices that identify a member, return
-/// the linearized index of the start of the member.
+/// \brief Compute the linearized index of a member in a nested
+/// aggregate/struct/array.
 ///
+/// Given an LLVM IR aggregate type and a sequence of insertvalue or
+/// extractvalue indices that identify a member, return the linearized index of
+/// the start of the member, i.e the number of element in memory before the
+/// seeked one. This is disconnected from the number of bytes.
+///
+/// \param Ty is the type indexed by \p Indices.
+/// \param Indices is an optional pointer in the indices list to the current
+/// index.
+/// \param IndicesEnd is the end of the indices list.
+/// \param CurIndex is the current index in the recursion.
+///
+/// \returns \p CurIndex plus the linear index in \p Ty  the indices list.
 unsigned ComputeLinearIndex(Type *Ty,
                             const unsigned *Indices,
                             const unsigned *IndicesEnd,
@@ -59,7 +70,7 @@ void ComputeValueVTs(const TargetLowering &TLI, Type *Ty,
                      uint64_t StartingOffset = 0);
 
 /// ExtractTypeInfo - Returns the type info, possibly bitcast, encoded in V.
-GlobalVariable *ExtractTypeInfo(Value *V);
+GlobalValue *ExtractTypeInfo(Value *V);
 
 /// hasInlineAsmMemConstraint - Return true if the inline asm instruction being
 /// processed uses a memory 'm' constraint.
@@ -97,6 +108,13 @@ bool returnTypeIsEligibleForTailCall(const Function *F,
                                      const ReturnInst *Ret,
                                      const TargetLoweringBase &TLI);
 
+// True if GV can be left out of the object symbol table. This is the case
+// for linkonce_odr values whose address is not significant. While legal, it is
+// not normally profitable to omit them from the .o symbol table. Using this
+// analysis makes sense when the information can be passed down to the linker
+// or we are in LTO.
+bool canBeOmittedFromSymbolTable(const GlobalValue *GV);
+
 } // End llvm namespace
 
 #endif