1 //===- CodeGen/Analysis.h - CodeGen LLVM IR Analysis Utilities --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares several CodeGen-specific LLVM IR analysis utilties.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CODEGEN_ANALYSIS_H
15 #define LLVM_CODEGEN_ANALYSIS_H
17 #include "llvm/Instructions.h"
18 #include "llvm/InlineAsm.h"
19 #include "llvm/ADT/SmallVector.h"
20 #include "llvm/CodeGen/ValueTypes.h"
21 #include "llvm/CodeGen/ISDOpcodes.h"
22 #include "llvm/Support/CallSite.h"
29 /// ComputeLinearIndex - Given an LLVM IR aggregate type and a sequence
30 /// of insertvalue or extractvalue indices that identify a member, return
31 /// the linearized index of the start of the member.
33 unsigned ComputeLinearIndex(const Type *Ty,
34 const unsigned *Indices,
35 const unsigned *IndicesEnd,
36 unsigned CurIndex = 0);
38 /// ComputeValueVTs - Given an LLVM IR type, compute a sequence of
39 /// EVTs that represent all the individual underlying
40 /// non-aggregate types that comprise it.
42 /// If Offsets is non-null, it points to a vector to be filled in
43 /// with the in-memory offsets of each of the individual values.
45 void ComputeValueVTs(const TargetLowering &TLI, const Type *Ty,
46 SmallVectorImpl<EVT> &ValueVTs,
47 SmallVectorImpl<uint64_t> *Offsets = 0,
48 uint64_t StartingOffset = 0);
50 /// ExtractTypeInfo - Returns the type info, possibly bitcast, encoded in V.
51 GlobalVariable *ExtractTypeInfo(Value *V);
53 /// hasInlineAsmMemConstraint - Return true if the inline asm instruction being
54 /// processed uses a memory 'm' constraint.
55 bool hasInlineAsmMemConstraint(std::vector<InlineAsm::ConstraintInfo> &CInfos,
56 const TargetLowering &TLI);
58 /// getFCmpCondCode - Return the ISD condition code corresponding to
59 /// the given LLVM IR floating-point condition code. This includes
60 /// consideration of global floating-point math flags.
62 ISD::CondCode getFCmpCondCode(FCmpInst::Predicate Pred);
64 /// getICmpCondCode - Return the ISD condition code corresponding to
65 /// the given LLVM IR integer condition code.
67 ISD::CondCode getICmpCondCode(ICmpInst::Predicate Pred);
69 /// Test if the given instruction is in a position to be optimized
70 /// with a tail-call. This roughly means that it's in a block with
71 /// a return and there's nothing that needs to be scheduled
72 /// between it and the return.
74 /// This function only tests target-independent requirements.
75 bool isInTailCallPosition(ImmutableCallSite CS, Attributes CalleeRetAttr,
76 const TargetLowering &TLI);
78 } // End llvm namespace