Commit Graph

3 Commits

Author SHA1 Message Date
Xiangling Liao 6b1e2fc893 [FE] Manipulate the first byte of guard variable type in both load and store operation
As Itanium ABI[http://itanium-cxx-abi.github.io/cxx-abi/abi.html#once-ctor]
points out:

"The size of the guard variable is 64 bits. The first byte (i.e. the byte at
the address of the full variable) shall contain the value 0 prior to
initialization of the associated variable, and 1 after initialization is complete."

Differential Revision: https://reviews.llvm.org/D95822
2021-02-08 11:14:34 -05:00
CJ Johnson 69cd776e1e [CodeGen] Apply 'nonnull' and 'dereferenceable(N)' to 'this' pointer
arguments.

* Adds 'nonnull' and 'dereferenceable(N)' to 'this' pointer arguments
* Gates 'nonnull' on -f(no-)delete-null-pointer-checks
* Introduces this-nonnull.cpp and microsoft-abi-this-nullable.cpp tests to
  explicitly test the behavior of this change
* Refactors hundreds of over-constrained clang tests to permit these
  attributes, where needed
* Updates Clang12 patch notes mentioning this change

Reviewed-by: rsmith, jdoerfert

Differential Revision: https://reviews.llvm.org/D17993
2020-11-16 17:39:17 -08:00
Xiangling Liao 6ef801aa6b [AIX] Static init frontend recovery and backend support
On the frontend side, this patch recovers AIX static init implementation to
use the linkage type and function names Clang chooses for sinit related function.

On the backend side, this patch sets correct linkage and function names on aliases
created for sinit/sterm functions.

Differential Revision: https://reviews.llvm.org/D84534
2020-08-10 10:10:49 -04:00