llvm-project.git/llvm/lib/CodeGen/SafeStackLayout.cpp, branch main

Cleanup codegen includes

2022-03-16T07:43:00+00:00

This is a (fixed) recommit of https://reviews.llvm.org/D121169

after:  1061034926
before: 1063332844

Discourse thread: https://discourse.llvm.org/t/include-what-you-use-include-cleanup
Differential Revision: https://reviews.llvm.org/D121681

Revert "Cleanup codegen includes"

2022-03-10T12:59:22+00:00

This reverts commit 7f230feeeac8a67b335f52bd2e900a05c6098f20.
Breaks CodeGenCUDA/link-device-bitcode.cu in check-clang,
and many LLVM tests, see comments on https://reviews.llvm.org/D121169

Cleanup codegen includes

2022-03-10T09:00:30+00:00

after:  1061034926
before: 1063332844

Differential Revision: https://reviews.llvm.org/D121169

[SafeStack] Use Align instead of uint64_t

2021-12-15T22:40:56+00:00

It is better typed, and the calls to getAlignment() are deprecated.

Differential Revision: https://reviews.llvm.org/D115466

Reland [IR] Increase max alignment to 4GB

2021-10-06T20:29:23+00:00

Currently the max alignment representable is 1GB, see D108661.
Setting the align of an object to 4GB is desirable in some cases to make sure the lower 32 bits are clear which can be used for some optimizations, e.g. https://crbug.com/1016945.

This uses an extra bit in instructions that carry an alignment. We can store 15 bits of "free" information, and with this change some instructions (e.g. AtomicCmpXchgInst) use 14 bits.
We can increase the max alignment representable above 4GB (up to 2^62) since we're only using 33 of the 64 values, but I've just limited it to 4GB for now.

The one place we have to update the bitcode format is for the alloca instruction. It stores its alignment into 5 bits of a 32 bit bitfield. I've added another field which is 8 bits and should be future proof for a while. For backward compatibility, we check if the old field has a value and use that, otherwise use the new field.

Updating clang's max allowed alignment will come in a future patch.

Reviewed By: hans

Differential Revision: https://reviews.llvm.org/D110451

[llvm] Use the default value of drop_begin (NFC)

2021-01-18T18:16:36+00:00

[llvm] Use llvm::stable_sort (NFC)

2021-01-14T03:14:43+00:00

SafeStackLayout.cpp - remove unnecessary StackLifetime.h include. NFCI.

2020-09-17T13:56:46+00:00

Already included in SafeStackLayout.h

[SafeStack,NFC] Fix names after files move

2020-06-17T08:08:40+00:00

Summary: Depends on D81831.

Reviewers: eugenis, pcc

Reviewed By: eugenis

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D81832

[SafeStack,NFC] Move SafeStackColoring code

2020-06-17T08:07:47+00:00

Summary:
This code is going to be used in StackSafety.
This patch is file move with minimal changes. Identifiers
will be fixed in the followup patch.

Reviewers: eugenis, pcc

Reviewed By: eugenis

Subscribers: mgorny, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D81831