Re: LLVM 22

On Sun, Jan 4, 2026 at 6:02 PM Thomas Munro <thomas(dot)munro(at)gmail(dot)com> wrote:
> On Sat, Jan 3, 2026 at 3:02 PM Thomas Munro <thomas(dot)munro(at)gmail(dot)com> wrote:
> > 1. We won't need our local llvm::backport::SectionMemoryManager for
> > LLVM 22, so it will be nice to draw a line under that messy business.
> > See commit message for details.
>
> While that's true, there is a problem with the patch I posted:
> "ReserveAlloc" is not enabled when called from C. I can't actually
> reproduce the issue locally due to lack of RAM connected to an ARM
> CPU, or I'd have noticed that... I'll attempt to do something about
> that upstream[1], let's see... if not, we can still use the new
> in-tree SectionMemoryManager, but we'll still need some C++ glue code.

That was successful, so here is an update.

A new unrelated assertion started firing in LLVM main/22 a few days ago:

v_nullbytemask = l_int8_const(lc, 1 << ((attnum) & 0x07));
Assertion failed: (llvm::isUIntN(BitWidth, val) && "Value is not
an N-bit unsigned value")

Here is a fix for that.