LLVM 20.0.0git
EHPersonalities.h
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1//===- EHPersonalities.h - Compute EH-related information -----------------===//
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#ifndef LLVM_IR_EHPERSONALITIES_H
10#define LLVM_IR_EHPERSONALITIES_H
11
12#include "llvm/ADT/DenseMap.h"
14
15namespace llvm {
16class BasicBlock;
17class Function;
18class Triple;
19class Value;
20
21enum class EHPersonality {
22 Unknown,
23 GNU_Ada,
24 GNU_C,
26 GNU_CXX,
32 CoreCLR,
33 Rust,
35 XL_CXX,
36 ZOS_CXX,
37};
38
39/// See if the given exception handling personality function is one
40/// that we understand. If so, return a description of it; otherwise return
41/// Unknown.
42EHPersonality classifyEHPersonality(const Value *Pers);
43
45
47
48/// Returns true if this personality function catches asynchronous
49/// exceptions.
51 // The two SEH personality functions can catch asynch exceptions. We assume
52 // unknown personalities don't catch asynch exceptions.
53 switch (Pers) {
56 return true;
57 default:
58 return false;
59 }
60 llvm_unreachable("invalid enum");
61}
62
63/// Returns true if this is a personality function that invokes
64/// handler funclets (which must return to it).
66 switch (Pers) {
71 return true;
72 default:
73 return false;
74 }
75 llvm_unreachable("invalid enum");
76}
77
78/// Returns true if this personality uses scope-style EH IR instructions:
79/// catchswitch, catchpad/ret, and cleanuppad/ret.
81 switch (Pers) {
87 return true;
88 default:
89 return false;
90 }
91 llvm_unreachable("invalid enum");
92}
93
94/// Return true if this personality may be safely removed if there
95/// are no invoke instructions remaining in the current function.
97 switch (Pers) {
99 return false;
100 // All known personalities currently have this behavior
101 default:
102 return true;
103 }
104 llvm_unreachable("invalid enum");
105}
106
107bool canSimplifyInvokeNoUnwind(const Function *F);
108
110
111/// If an EH funclet personality is in use (see isFuncletEHPersonality),
112/// this will recompute which blocks are in which funclet. It is possible that
113/// some blocks are in multiple funclets. Consider this analysis to be
114/// expensive.
116
117} // end namespace llvm
118
119#endif // LLVM_IR_EHPERSONALITIES_H
This file defines the DenseMap class.
#define F(x, y, z)
Definition: MD5.cpp:55
TinyPtrVector - This class is specialized for cases where there are normally 0 or 1 element in a vect...
Definition: TinyPtrVector.h:29
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
@ BasicBlock
Various leaf nodes.
Definition: ISDOpcodes.h:71
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
StringRef getEHPersonalityName(EHPersonality Pers)
DenseMap< BasicBlock *, ColorVector > colorEHFunclets(Function &F)
If an EH funclet personality is in use (see isFuncletEHPersonality), this will recompute which blocks...
bool isScopedEHPersonality(EHPersonality Pers)
Returns true if this personality uses scope-style EH IR instructions: catchswitch,...
bool isNoOpWithoutInvoke(EHPersonality Pers)
Return true if this personality may be safely removed if there are no invoke instructions remaining i...
bool canSimplifyInvokeNoUnwind(const Function *F)
EHPersonality classifyEHPersonality(const Value *Pers)
See if the given exception handling personality function is one that we understand.
bool isFuncletEHPersonality(EHPersonality Pers)
Returns true if this is a personality function that invokes handler funclets (which must return to it...
bool isAsynchronousEHPersonality(EHPersonality Pers)
Returns true if this personality function catches asynchronous exceptions.
TinyPtrVector< BasicBlock * > ColorVector
EHPersonality getDefaultEHPersonality(const Triple &T)