LLVM  14.0.0git
IntrinsicLowering.h
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1 //===-- IntrinsicLowering.h - Intrinsic Function Lowering -------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file defines the IntrinsicLowering interface. This interface allows
10 // addition of domain-specific or front-end specific intrinsics to LLVM without
11 // having to modify all of the C backend or interpreter.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_CODEGEN_INTRINSICLOWERING_H
16 #define LLVM_CODEGEN_INTRINSICLOWERING_H
17 
18 #include "llvm/IR/Intrinsics.h"
19 
20 namespace llvm {
21 class CallInst;
22 class DataLayout;
23 
25  const DataLayout &DL;
26 
27  bool Warned;
28 
29 public:
30  explicit IntrinsicLowering(const DataLayout &DL) : DL(DL), Warned(false) {}
31 
32  /// Replace a call to the specified intrinsic function.
33  /// If an intrinsic function must be implemented by the code generator
34  /// (such as va_start), this function should print a message and abort.
35  ///
36  /// Otherwise, if an intrinsic function call can be lowered, the code to
37  /// implement it (often a call to a non-intrinsic function) is inserted
38  /// _after_ the call instruction and the call is deleted. The caller must
39  /// be capable of handling this kind of change.
40  void LowerIntrinsicCall(CallInst *CI);
41 
42  /// Try to replace a call instruction with a call to a bswap intrinsic. Return
43  /// false if the call is not a simple integer bswap.
44  static bool LowerToByteSwap(CallInst *CI);
45 };
46 }
47 
48 #endif
llvm
---------------------— PointerInfo ------------------------------------—
Definition: AllocatorList.h:23
llvm::DataLayout
A parsed version of the target data layout string in and methods for querying it.
Definition: DataLayout.h:112
llvm::IntrinsicLowering::LowerToByteSwap
static bool LowerToByteSwap(CallInst *CI)
Try to replace a call instruction with a call to a bswap intrinsic.
Definition: IntrinsicLowering.cpp:454
llvm::IntrinsicLowering
Definition: IntrinsicLowering.h:24
Intrinsics.h
false
Definition: StackSlotColoring.cpp:142
llvm::IntrinsicLowering::IntrinsicLowering
IntrinsicLowering(const DataLayout &DL)
Definition: IntrinsicLowering.h:30
DL
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
Definition: AArch64SLSHardening.cpp:76
llvm::CallInst
This class represents a function call, abstracting a target machine's calling convention.
Definition: Instructions.h:1475
llvm::IntrinsicLowering::LowerIntrinsicCall
void LowerIntrinsicCall(CallInst *CI)
Replace a call to the specified intrinsic function.
Definition: IntrinsicLowering.cpp:224