llvm-project.git/llvm/lib/FuzzMutate/RandomIRBuilder.cpp, branch main

[FuzzMutate] Prevent the mutator from generating illegal memory operations (#144885)

2025-07-04T14:48:31+00:00

This PR prevents the mutator from generating illegal memory operations
for AMDGCN. In particular, direct store and load instructions on
addrspace(8) are not permitted. This PR fixes that by properly
introducing casts to addrspace(7) when required.

[llvm] Remove unused includes (NFC) (#142733)

2025-06-04T19:30:52+00:00

These are identified by misc-include-cleaner.  I've filtered out those
that break builds.  Also, I'm staying away from llvm-config.h,
config.h, and Compiler.h, which likely cause platform- or
compiler-specific build failures.

[llvm] Construct SmallVector with iterator ranges (NFC) (#136460)

2025-04-20T02:07:10+00:00

[IR] Replace of PointerType::get(Type) with opaque version (NFC) (#123617)

2025-01-20T15:32:56+00:00

In accordance with https://github.com/llvm/llvm-project/issues/123569

In order to keep the patch at reasonable size, this PR only covers for
the llvm subproject, unittests excluded.

[FuzzMutate] replace undef placeholders with poison

2024-11-20T14:09:39+00:00

[DataLayout] Remove constructor accepting a pointer to Module (#102841)

2024-08-13T01:00:19+00:00

The constructor initializes `*this` with `M->getDataLayout()`, which
is effectively the same as calling the copy constructor.
There does not seem to be a case where a copy would be necessary.

Pull Request: https://github.com/llvm/llvm-project/pull/102841

[DebugInfo][RemoveDIs] Use iterator-insertion in unittests and fuzzer (#102015)

2024-08-08T14:18:34+00:00

These are the final few places in LLVM that use instruction pointers to
insert instructions -- use iterators instead, which is needed for
debug-info correctness in the future. Most of this is a gentle
scattering of getIterator calls or not deref-then-addrofing iterators.
libfuzzer does require a storage change to keep built instruction
positions in a container though. The unit-test changes are very
straightforwards.

This leaves us in a position where libfuzzer can't fuzz on either of
debug-info records, however I don't believe that fuzzing of debug-info
is in scope for the library.

[RandomIRBuilder] Remove use of getNonOpaquePointerElementType() (NFC)

2023-07-14T08:54:38+00:00

[llvm][clang] Remove uses of isOpaquePointerTy() (NFC)

2023-07-14T08:27:58+00:00

This now always returns true (for pointer types).

[FuzzMutate] Handle BB without predecessor, avoid insertion after `musttail call`, avoid sinking token type

2023-06-02T02:52:16+00:00

FuzzMutate didn't consider some corner cases and leads to mutation failure when mutating some modules.
This patch fixes 3 bugs:

- Add null check when encountering basic blocks without predecessor to avoid segmentation fault
- Avoid insertion after `musttail call` instruction
- Avoid sinking token type

Unit tests are also added.

Reviewed By: Peter

Differential Revision: https://reviews.llvm.org/D151936