Support the following BCD format conversion builtins for PowerPC.
- `__builtin_bcdshift` – Shifts a packed decimal value by a specified
number of decimal digits.
- `__builtin_bcdshiftround` – Shifts a packed decimal value by a
specified number of decimal digits, with rounding applied.
- `__builtin_bcdtruncate` –Truncates a packed decimal value to a
specified number of digits.
- `__builtin_bcdunsignedtruncate` – Truncates a packed decimal value and
returns the result as an unsigned packed decimal.
- `__builtin_bcdunsignedshift` – Shifts an unsigned packed decimal value
by a specified number of digits.
> Note: This built-in functions are valid only when all following
conditions are met:
> -qarch is set to utilize POWER9 technology.
> The bcd.h file is included.
## Prototypes
```c
vector unsigned char __builtin_bcdshift(vector unsigned char, int, unsigned char);
vector unsigned char __builtin_bcdshiftround(vector unsigned char, int, unsigned char);
vector unsigned char __builtin_bcdtruncate(vector unsigned char, int, unsigned char);
vector unsigned char __builtin_bcdunsignedtruncate(vector unsigned char, int);
vector unsigned char __builtin_bcdunsignedshift(vector unsigned char, int);
```
---------
This commit adds 4 Clang builtins for PowerPC AMO store operations:
__builtin_amo_stwat for 32-bit unsigned operations
__builtin_amo_stdat for 64-bit unsigned operations
__builtin_amo_stwat_s for 32-bit signed operations
__builtin_amo_stdat_s for 64-bit signed operations
and maps GCC's AMO store functions to these Clang builtins for
compatibility.
This commit adds 4 Clang builtins for PowerPC AMO load conditional
increment and decrement operations:
__builtin_amo_lwat_cond for 32-bit unsigned operations
__builtin_amo_ldat_cond for 64-bit unsigned operations
__builtin_amo_lwat_cond_s for 32-bit signed operations
__builtin_amo_ldat_cond_s for 64-bit signed operations
This commit adds two Clang builtins for AMO load signed operations:
__builtin_amo_lwat_s for 32-bit signed operations
__builtin_amo_ldat_s for 64-bit signed operations
This commit adds two Clang builtins for PowerPC AMO load operations:
__builtin_amo_lwat for 32-bit unsigned operations
__builtin_amo_ldat for 64-bit unsigned operations
Also adds an amo.h header that maps GCC's AMO functions to these Clang
builtins for compatibility.
This reintroduces `Type.h`, having earlier been renamed to `TypeBase.h`,
as a redirection to `TypeBase.h`, and redirects most users to include
the former instead.
This is a preparatory patch for being able to provide inline definitions
for `Type` methods which would otherwise cause a circular dependency
with `Decl{,CXX}.h`.
Doing these operations into their own NFC patch helps the git rename
detection logic work, preserving the history.
This patch makes clang just a little slower to build (~0.17%), just
because it makes more code indirectly include `DeclCXX.h`.
This is a preparatory patch, to be able to provide inline definitions
for `Type` functions which depend on `Decl{,CXX}.h`. As the latter also
depends on `Type.h`, this would not be possible without some
reorganizing.
Splitting this rename into its own patch allows git to track this as a
rename, and preserve all git history, and not force any code
reformatting.
A later NFC patch will reintroduce `Type.h` as redirection to
`TypeBase.h`, rewriting most places back to directly including `Type.h`
instead of `TypeBase.h`, leaving only a handful of places where this is
necessary.
Then yet a later patch will exploit this by making more stuff inline.
Support the following BCD format conversion builtins for PowerPC.
- `__builtin_bcdcopysign` – Conversion that returns the decimal value of
the first parameter combined with the sign code of the second parameter.
`
- `__builtin_bcdsetsign` – Conversion that sets the sign code of the
input parameter in packed decimal format.
> Note: This built-in function is valid only when all following
conditions are met:
> -qarch is set to utilize POWER9 technology.
> The bcd.h file is included.
## Prototypes
```c
vector unsigned char __builtin_bcdcopysign(vector unsigned char, vector unsigned char);
vector unsigned char __builtin_bcdsetsign(vector unsigned char, unsigned char);
```
## Usage Details
`__builtin_bcdsetsign`: Returns the packed decimal value of the first
parameter combined with the sign code.
The sign code is set according to the following rules:
- If the packed decimal value of the first parameter is positive, the
following rules apply:
- If the second parameter is 0, the sign code is set to 0xC.
- If the second parameter is 1, the sign code is set to 0xF.
- If the packed decimal value of the first parameter is negative, the
sign code is set to 0xD.
> notes:
> The second parameter can only be 0 or 1.
> You can determine whether a packed decimal value is positive or
negative as follows:
> - Packed decimal values with sign codes **0xA, 0xC, 0xE, or 0xF** are
interpreted as positive.
> - Packed decimal values with sign codes **0xB or 0xD** are interpreted
as negative.
---------
Co-authored-by: Aditi-Medhane <aditi.medhane@ibm.com>
This is a major change on how we represent nested name qualifications in
the AST.
* The nested name specifier itself and how it's stored is changed. The
prefixes for types are handled within the type hierarchy, which makes
canonicalization for them super cheap, no memory allocation required.
Also translating a type into nested name specifier form becomes a no-op.
An identifier is stored as a DependentNameType. The nested name
specifier gains a lightweight handle class, to be used instead of
passing around pointers, which is similar to what is implemented for
TemplateName. There is still one free bit available, and this handle can
be used within a PointerUnion and PointerIntPair, which should keep
bit-packing aficionados happy.
* The ElaboratedType node is removed, all type nodes in which it could
previously apply to can now store the elaborated keyword and name
qualifier, tail allocating when present.
* TagTypes can now point to the exact declaration found when producing
these, as opposed to the previous situation of there only existing one
TagType per entity. This increases the amount of type sugar retained,
and can have several applications, for example in tracking module
ownership, and other tools which care about source file origins, such as
IWYU. These TagTypes are lazily allocated, in order to limit the
increase in AST size.
This patch offers a great performance benefit.
It greatly improves compilation time for
[stdexec](https://github.com/NVIDIA/stdexec). For one datapoint, for
`test_on2.cpp` in that project, which is the slowest compiling test,
this patch improves `-c` compilation time by about 7.2%, with the
`-fsyntax-only` improvement being at ~12%.
This has great results on compile-time-tracker as well:
This patch also further enables other optimziations in the future, and
will reduce the performance impact of template specialization resugaring
when that lands.
It has some other miscelaneous drive-by fixes.
About the review: Yes the patch is huge, sorry about that. Part of the
reason is that I started by the nested name specifier part, before the
ElaboratedType part, but that had a huge performance downside, as
ElaboratedType is a big performance hog. I didn't have the steam to go
back and change the patch after the fact.
There is also a lot of internal API changes, and it made sense to remove
ElaboratedType in one go, versus removing it from one type at a time, as
that would present much more churn to the users. Also, the nested name
specifier having a different API avoids missing changes related to how
prefixes work now, which could make existing code compile but not work.
How to review: The important changes are all in
`clang/include/clang/AST` and `clang/lib/AST`, with also important
changes in `clang/lib/Sema/TreeTransform.h`.
The rest and bulk of the changes are mostly consequences of the changes
in API.
PS: TagType::getDecl is renamed to `getOriginalDecl` in this patch, just
for easier to rebasing. I plan to rename it back after this lands.
Fixes#136624
Fixes https://github.com/llvm/llvm-project/issues/43179
Fixes https://github.com/llvm/llvm-project/issues/68670
Fixes https://github.com/llvm/llvm-project/issues/92757
Support the following packed BCD builtins for PowerPC.
```
__builtin_national2packed - Conversion of National format to Packed decimal format.
__builtin_packed2national - Conversion of Packed decimal format to national format.
__builtin_packed2zoned - Conversion of Packed decimal format to Zoned decimal format.
__builtin_zoned2packed - Conversion of Zoned decimal format to Packed decimal format.
```
### Prototypes:
`vector unsigned char __builtin_national2packed(vector unsigned char a,
unsigned char b);`
`vector unsigned char __builtin_packed2zoned(vector unsigned char,
unsigned char);`
`vector unsigned char __builtin_zoned2packed(vector unsigned char,
unsigned char);`
The condition for the 2nd parameter is consistent over all the 3
prototypes (0 or 1 only).
`vector unsigned char __builtin_packed2national(vector unsigned char);`
Co-authored-by: himadhith <himadhith.v@ibm.com>
Co-authored-by: Tony Varghese <tonypalampalliyil@gmail.com>
When various `Sema*.h` and `Sema*.cpp` files were created, cleanup of
`Sema.h` includes and forward declarations was left for the later.
Now's the time. This commit touches `Sema.h` and Sema components:
1. Unused includes are removed.
2. Unused forward declarations are removed.
3. Missing includes are added (those files are largely IWYU-clean now).
4. Includes were converted into forward declarations where possible.
As this commit focuses on headers, all changes to `.cpp` files were
minimal, and were aiming at keeping everything buildable.
Implement BCD assist builtins for XL and GCC compatibility.
GCC compat:
```
unsigned int __builtin_cdtbcd (unsigned int);
unsigned int __builtin_cbcdtd (unsigned int);
unsigned int __builtin_addg6s (unsigned int, unsigned int);
```
64BIT XL compat:
```
long long __cdtbcd (long long);
long long __cbcdtd (long long);
long long __addg6s (long long source1, long long source2)
```
This patch introduces `SemaAMDGPU`, `SemaARM`, `SemaBPF`, `SemaHexagon`,
`SemaLoongArch`, `SemaMIPS`, `SemaNVPTX`, `SemaPPC`, `SemaSystemZ`,
`SemaWasm`. This continues previous efforts to split Sema up. Additional
context can be found in #84184 and #92682.
I decided to bundle target-specific components together because of their
low impact on `Sema`. That said, their impact on `SemaChecking.cpp` is
far from low, and I consider it a success.
Somewhat accidentally, I also moved Wasm- and AMDGPU-specific function
from `SemaDeclAttr.cpp`, because they were exposed in `Sema`. That went
well, and I consider it a success, too. I'd like to move the rest of
static target-specific functions out of `SemaDeclAttr.cpp` like we're
doing with built-ins in `SemaChecking.cpp` .
