view tests/mini/asm10.d @ 1346:6f4154b318ef

Remove an old workaround that was kept around for ABI-compatibility on x86-64 between different LLVM versions. This means LLVM r67588 is required if you want to compile for x86-64, otherwise the backend will assert when you try to return e.g. struct { int i; char c; } from a function. (In particular, this is no longer compatible with LLVM 2.5) It also means that any code returning small structs on x86-64 will probably need to be recompiled in order to be linkable to code compiled with this change.
author Frits van Bommel <fvbommel wxs.nl>
date Tue, 12 May 2009 15:50:48 +0200
parents 97d80437cb80
children
line wrap: on
line source

module asm10;

struct S {
    ushort first;
    ushort second;
    int unaccessed;
}

void main() {
    auto s = S(512, 42, -1);
    ushort x = 0;
    version(D_InlineAsm_X86) {
        asm {
            lea EAX, s;
            mov CX, S.second[EAX];
            mov x, CX;
            mov S.first[EAX], 640;
        }
    } else version(D_InlineAsm_X86_64) {
        asm {
            lea RAX, s;
            mov CX, S.second[RAX];
            mov x, CX;
            mov S.first[RAX], 640;
        }
    }
    assert(x == 42);
    assert(s.first == 640);
    assert(s.second == 42);
    assert(s.unaccessed == -1);
}