These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.66 s (backtrack: 0/20).

[ebuild  N     ] dev-lang/ocaml-5.5.1:0/5.5.1::gentoo  USE="ocamlopt -emacs -flambda -latex -test -xemacs" 6457 KiB
[ebuild  N     ] dev-ml/dune-3.23.1:0/3.23.1::gentoo  USE="-emacs -test" 3624 KiB
[ebuild  N     ] dev-ml/findlib-1.9.8-r1:0/1::gentoo  USE="ocamlopt -doc -tk" 269 KiB
[ebuild  N     ] dev-ml/result-1.5:0/1.5::gentoo  USE="ocamlopt" 3 KiB
[ebuild  N     ] dev-ml/stdlib-shims-0.3.0::gentoo  USE="ocamlopt" 10 KiB
[ebuild  N     ] dev-ml/integers-0.8.0:0/0.8.0::gentoo  USE="ocamlopt" 15 KiB
[ebuild  N     ] dev-ml/csexp-1.5.2-r1:0/1.5.2::gentoo  USE="ocamlopt -test" 12 KiB
[ebuild  N     ] dev-ml/dune-configurator-3.21.1:0/3.21.1::gentoo  USE="ocamlopt" 3352 KiB
[ebuild  N     ] dev-ml/ocaml-ctypes-0.24.0:0/0.24.0::gentoo  USE="ocamlopt -test" 196 KiB
[ebuild  NS    ] llvm-core/llvm-20.1.8:20/20.1::gentoo [22.1.1:22/22.1::gentoo] USE="binutils-plugin libffi zstd -debug (-debuginfod) -doc -exegesis -libedit -test -verify-sig -xml -z3" LLVM_TARGETS="(AArch64) (AMDGPU) (ARM) (AVR) (BPF) (Hexagon) (Lanai) (LoongArch) (MSP430) (Mips) (NVPTX) (PowerPC) (RISCV) (SPIRV) (Sparc) (SystemZ) (VE) (WebAssembly) (X86) (XCore) -ARC -CSKY -DirectX -M68k -Xtensa" 144082 KiB
[ebuild  NS    ] llvm-core/llvm-toolchain-symlinks-20-r1:20::gentoo [22:22::gentoo] USE="-multilib-symlinks -native-symlinks" 0 KiB
[ebuild  N     ] dev-ml/llvm-20.1.8:0/20.1.8::gentoo  USE="-debug -test -verify-sig" LLVM_TARGETS="AMDGPU BPF NVPTX (X86) -AArch64 -ARC -ARM -AVR -CSKY -DirectX -Hexagon -Lanai -LoongArch -M68k -MSP430 -Mips -PowerPC -RISCV -SPIRV -Sparc -SystemZ -VE -WebAssembly -XCore -Xtensa" 0 KiB

Total: 12 packages (10 new, 2 in new slots), Size of downloads: 158014 KiB