[LLVMdev] Non-standard byte sizes

[David Given]

For a hypothetical Evil Project(tm), I would like to do a LLVM backend
for a virtual machine that does not use 8-bit bytes. Does LLVM support
this sort of thing?

The details are: each addressing unit in the virtual machine can store a
single value of any type, except for data pointers, which are stored as
pairs (handle and offset). As such, sizeof(char) == sizeof(int) ==
sizeof(long long) == sizeof(float) == sizeof(double) ==
sizeof(void(*)()) == 1, and sizeof(void*) == 2.

I did achieve success with another compiler framework a while back ---
but I did have to fix some bugs in it first. This isn't something people
tend to want to do much!

On a related note, I remember seeing compile-time flags to clang to tell
it the sizes of the various primitive types, but I can't find them any
more. Do they still exist or will I need to do a custom clang build to
change them?

-- 
┌─── ｄｇ＠ｃｏｗｌａｒｋ．ｃｏｍ ───── http://www.cowlark.com ─────
│
│ life←{ ↑1 ⍵∨.^3 4=+/,¯1 0 1∘.⊖¯1 0 1∘.⌽⊂⍵ }
│ --- Conway's Game Of Life, in one line of APL

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