AaronBallman wrote:
> I'd rather keep the libc++ tests green while landing this PR. I tried
> something out, let's see if that works.
It looks like some further adjustments may be needed as some stage1 builders
are failing:
```
# .---command stderr
# |
AaronBallman wrote:
> I don't think this feature warrants deviating from our policy that on-by
> default warnings should be actionable and have a low false-positive rate, nor
> the complexity to actually produce the warning.
Specific to this point, what concerns me is that there are uses
cor3ntin wrote:
For the record, I am fairly opposed to a warning on normal use of a standard
function.
I'm not very concerned about users using different target flags across TUs
because this is already a massive foot gun and I do not buy that we are making
things materially worse.
Instead,
@@ -1792,6 +1792,11 @@ class TargetInfo : public TransferrableTargetInfo,
/// Whether to support HIP image/texture API's.
virtual bool hasHIPImageSupport() const { return true; }
+ /// The minimum offset between two objects to avoid false sharing.
+ virtual unsigned
@@ -1792,6 +1792,11 @@ class TargetInfo : public TransferrableTargetInfo,
/// Whether to support HIP image/texture API's.
virtual bool hasHIPImageSupport() const { return true; }
+ /// The minimum offset between two objects to avoid false sharing.
@@ -89,6 +89,19 @@ sections with improvements to Clang's support for those
languages.
C++ Language Changes
+C++17 Feature Support
+^
+- Clang now exposes ``__GCC_DESTRUCTIVE_SIZE`` and ``__GCC_CONSTRUCTIVE_SIZE``
+ predefined macros
@@ -89,6 +89,19 @@ sections with improvements to Clang's support for those
languages.
C++ Language Changes
+C++17 Feature Support
+^
+- Clang now exposes ``__GCC_DESTRUCTIVE_SIZE`` and ``__GCC_CONSTRUCTIVE_SIZE``
+ predefined macros
@@ -1792,6 +1792,11 @@ class TargetInfo : public TransferrableTargetInfo,
/// Whether to support HIP image/texture API's.
virtual bool hasHIPImageSupport() const { return true; }
+ /// The minimum offset between two objects to avoid false sharing.
+ virtual unsigned
@@ -1792,6 +1792,11 @@ class TargetInfo : public TransferrableTargetInfo,
/// Whether to support HIP image/texture API's.
virtual bool hasHIPImageSupport() const { return true; }
+ /// The minimum offset between two objects to avoid false sharing.
https://github.com/jyknight edited
https://github.com/llvm/llvm-project/pull/89446
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https://github.com/jyknight commented:
I think having the on-by-default diagnostic before we release this
functionality is critically important -- but the primarily-useful part of that
is going to be for the public libc++ APIs which expose these values (and, that
already landed in mainline).
@@ -89,6 +89,19 @@ sections with improvements to Clang's support for those
languages.
C++ Language Changes
+C++17 Feature Support
+^
+- Clang now exposes ``__GCC_DESTRUCTIVE_SIZE`` and ``__GCC_CONSTRUCTIVE_SIZE``
+ predefined macros
@@ -89,6 +89,19 @@ sections with improvements to Clang's support for those
languages.
C++ Language Changes
+C++17 Feature Support
+^
+- Clang now exposes ``__GCC_DESTRUCTIVE_SIZE`` and ``__GCC_CONSTRUCTIVE_SIZE``
+ predefined macros
@@ -89,6 +89,19 @@ sections with improvements to Clang's support for those
languages.
C++ Language Changes
+C++17 Feature Support
+^
+- Clang now exposes ``__GCC_DESTRUCTIVE_SIZE`` and ``__GCC_CONSTRUCTIVE_SIZE``
+ predefined macros
https://github.com/ldionne approved this pull request.
I'd rather keep the libc++ tests green while landing this PR. I tried something
out, let's see if that works.
Otherwise LGTM, thanks for tackling this long-standing item on our TODO list :-)
https://github.com/llvm/llvm-project/pull/89446
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