LLVM 17.0.0git
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
18namespace llvm {
19class CallInst;
20class DataLayout;
21
23 const DataLayout &DL;
24
25 bool Warned = false;
26
27public:
28 explicit IntrinsicLowering(const DataLayout &DL) : DL(DL) {}
29
30 /// Replace a call to the specified intrinsic function.
31 /// If an intrinsic function must be implemented by the code generator
32 /// (such as va_start), this function should print a message and abort.
33 ///
34 /// Otherwise, if an intrinsic function call can be lowered, the code to
35 /// implement it (often a call to a non-intrinsic function) is inserted
36 /// _after_ the call instruction and the call is deleted. The caller must
37 /// be capable of handling this kind of change.
39
40 /// Try to replace a call instruction with a call to a bswap intrinsic. Return
41 /// false if the call is not a simple integer bswap.
42 static bool LowerToByteSwap(CallInst *CI);
43};
44}
45
46#endif
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
This class represents a function call, abstracting a target machine's calling convention.
A parsed version of the target data layout string in and methods for querying it.
Definition: DataLayout.h:114
void LowerIntrinsicCall(CallInst *CI)
Replace a call to the specified intrinsic function.
static bool LowerToByteSwap(CallInst *CI)
Try to replace a call instruction with a call to a bswap intrinsic.
IntrinsicLowering(const DataLayout &DL)
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18