For both GCC and LLVM, `__builtin_expect` and `llvm_expect` respectively
return an integer, not a boolean. This triggers a compiler error as
implicit narrow conversions are not allowed.

* Use const when possible

* Fix error

matters.

…20699)

API instead.

handled by allocating an empty array with metadata!

…!20702)

Move all array and finalizer functionality into the GC

Co-authored-by: Dennis Korpel <[email protected]>

…lang/dmd!20711)

…md!20710)

* Fix build on i686, arm64 and x86_64+32b multilib for Darwin.

osthread.d needs to import the thread state definitions for each
supported arch (but was only importing x86_64).

NOTE1: Iain Buclaw pointed out that the ucontext import was unused
and do I have removed that too.

NOTE2: I did not add the data for 32bit Arm (as distinct from the
possible use of AArch64/ILP32), because there is no way I know
to test that - since there's no upstream 32b Arm implementation.

NOTE3: The earlier Darwin versions (equivalent to MacOSX 10.5) have
quite limited D support - but both i686 and PowerPC should be able
(at least) to build the druntime.

I tested on x86_64,i686-Darwin17 and aarch64-darwin23.

Signed-off-by: Iain Sandoe <[email protected]>

* Address code reviews.

---------

Signed-off-by: Iain Sandoe <[email protected]>
Co-authored-by: Iain Buclaw <[email protected]>

* Fix dlang/dmd!21024 - Optimize x^^c expressions

Reason for the *magic* constraint c<8 on inlining x^^c:

https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/x86_64/fpu/e_powl.S;h=47f129f34d368d7c67b8e5f2462b36b0bebb7621;hb=HEAD#l136

* Fix poor assumption about expression state

* Restrict optimization to floating point expressions

* Generalize optimization to any scalar data type

* Fix segfault on x^^c where x is a single member anonymous enum

DMD segfaulted on compiling the unittests in std/algorithm/sorting.o, the
unittest that caused the segfault can be reduced to:

    enum real Two = 2.0;
    auto _ = Two^^3;

I'm not sure why copying the anonymous enum into a `const` variable causes
the compiler to segfault.

* Add tests to x^^c inlining optimization

* Fix missing type for e1 ^^ -1 to 1 / e1 rewrite

* Move rewrites from constant folding to expression semantic and restrict them to [-1, 2]

* Improve error message for the x^^2 rewrite.

Before:
    ex.d(4): Error: can implicitly convert expression `(const const(double) __powtmp2 = x + 5.0;) , __powtmp2 * ...` of type `double` to `int`
        int y = ( x + 5 ) ^^ 2;
                ^
and after:
    ex.d(4): Error: cannot implicitly convert expression `(x + 5.0) ^^ 2L` of type `double` to `int`
        int y = ( x + 5 ) ^^ 2;
                ^

* Update C++ frontend header to match change in `CommaExp`

* Address code review feedback

Co-authored-by: Dennis Korpel <[email protected]>

---------

Co-authored-by: Dennis Korpel <[email protected]>

…082)" (dlang/dmd!21114)

This reverts commit 601bef5.

….111

Partially reverts the regressing change in 0a9b845. The "fixed"
refactoring should be applied to master/development branch.

Fixes: dlang/dmd#21183

The previous MR put the macro in a `#if linux` which meant it
didn't actually solve the problem of being unable to
`#include <math.h>` on macos. So put it in a better spot.

Also enable the test that includes that header for macos so that
it stays solved.

…UPPORT_SANITIZERS=ON for now

…used in cast() (dlang/dmd!21201)

Strips off additional bits that are not part of the actual TLV key to avoid applications using DRuntime crashing during initialization.

Fixes dlang/dmd!21126.

….111