Commit Graph

5 Commits

Author SHA1 Message Date
Nicolai Hähnle a888e492f6 [IR] Memory intrinsics are not unconditionally `nosync`
Remove the `nosync` attribute from the memory intrinsic definitions
(i.e. memset, memcpy, memmove).

Like native memory accesses, memory intrinsics can be volatile. This is
indicated by an immarg in the intrinsic call. All else equal, a volatile
memory intrinsic is `sync`, so we cannot annotate the intrinsic functions
themselves as `nosync`. The attributor and function-attr passes know to
take the volatile bit into account.

Since `nosync` is a default attribute, this means we have to stop using
the DefaultAttrIntrinsic tablegen class for memory intrinsics, and
specify all default attributes other than `nosync` explicitly.

Most of the test changes are trivial churn, but one test case
(in nosync.ll) was in fact incorrect before this change.

Differential Revision: https://reviews.llvm.org/D102295
2021-05-21 03:40:59 +02:00
Johannes Doerfert 9c2074dccb [Attributor][NFC] Update tests after D94741
The update_test_checks script can now check for global symbols and is able
to handle them properly when they differ across prefixes, e.g.,
attribute #0 might be different in different runs.

This patch simply updates all the Attributor tests with the new script.

Reviewed By: sstefan1

Differential Revision: https://reviews.llvm.org/D97906
2021-03-11 23:31:39 -06:00
William S. Moses d163e75c81 [Attributor] Enable heap-to-stack of any size
Enable Attributor's heap-to-stack to lower unbounded allocations given a max size of -1

Differential Revision: https://reviews.llvm.org/D97873
2021-03-06 12:57:32 -05:00
William S. Moses 2b896e39bf Revert "[Attributor] Enable heap-to-stack of any size"
This reverts commit 51bd42ef9b.
2021-03-04 17:24:56 -05:00
William S. Moses 51bd42ef9b [Attributor] Enable heap-to-stack of any size
Enable Attributor's heap-to-stack to lower unbounded allocations given a max size of -1

Differential Revision: https://reviews.llvm.org/D97873
2021-03-04 17:17:23 -05:00