X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FAnalysis.h;h=c4b94ede4f5596165099fbc2028bbd6ac8364563;hb=5c7f7462e40e98bf6fa02baadec7337586192b7e;hp=c5060fb5441cdc889a786847934fd0ba1c383816;hpb=ad3aa5eb5a0c5ccd11c9b7210d6d3b90004b05c9;p=oota-llvm.git

diff --git a/include/llvm/CodeGen/Analysis.h b/include/llvm/CodeGen/Analysis.h
index c5060fb5441..c4b94ede4f5 100644
--- a/include/llvm/CodeGen/Analysis.h
+++ b/include/llvm/CodeGen/Analysis.h
@@ -22,18 +22,30 @@
 #include "llvm/IR/Instructions.h"
 
 namespace llvm {
-class GlobalVariable;
+class GlobalValue;
 class TargetLoweringBase;
+class TargetLowering;
+class TargetMachine;
 class SDNode;
 class SDValue;
 class SelectionDAG;
-class TargetLowering;
 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,
@@ -58,7 +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.
@@ -86,7 +98,7 @@ ISD::CondCode getICmpCondCode(ICmpInst::Predicate Pred);
 /// between it and the return.
 ///
 /// This function only tests target-independent requirements.
-bool isInTailCallPosition(ImmutableCallSite CS, const SelectionDAG &DAG);
+bool isInTailCallPosition(ImmutableCallSite CS, const TargetMachine &TM);
 
 /// Test if given that the input instruction is in the tail call position if the
 /// return type or any attributes of the function will inhibit tail call
@@ -96,6 +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