Bug 20629 – atomicStore does not compile for struct using -m64

The following code fails to compile with -m64 but passes with -m32: atomics.d: ------------------------------------- import core.atomic : atomicStore; void main() { static struct Struct { uint a, b; } shared Struct s1 = Struct(1, 2); atomicStore(s1, Struct(3, 4)); assert(cast(uint) s1.a == 3); assert(cast(uint) s1.b == 4); } ------------------------------------- Compiler output: ------------------------------------- core\internal\atomic.d(231): Error: template core.internal.atomic.atomicExchange cannot deduce function from argument types !(cast(MemoryOrder)5, false)(Struct*, Struct), candidates are: core\internal\atomic.d(289): atomicExchange(MemoryOrder order = MemoryOrder.seq, bool result = true, T)(T* dest, T value) with order = order, result = false, T = Struct must satisfy one of the following constraints: is(T : ulong) is(T == class) is(T == interface) is(T U : U*) core\atomic.d(127): Error: template instance core.internal.atomic.atomicStore!(cast(MemoryOrder)5, Struct) error instantiating core\atomic.d(142): instantiated from here: atomicStore!(cast(MemoryOrder)5, Struct, Struct) .\atomics.d(12): instantiated from here: atomicStore!(cast(MemoryOrder)5, Struct, Struct) ------------------------------------- Reduced from https://forum.dlang.org/post/[email protected].

@MoonlightSentinel created dlang/druntime pull request #2971 "Fix Issue 20629 - atomicStore does not compile for struct using -m64" fixing this issue: - Fix Issue 20629 - atomicStore does not compile for struct using -m64 https://github.com/dlang/druntime/pull/2971

dlang/druntime pull request #2971 "Fix Issue 20629 - atomicStore does not compile for struct using -m64" was merged into stable: - 963f2cd1b6dcae56b9684603b5987f6fce17b3cf by MoonlightSentinel: Fix Issue 20629 - atomicStore does not compile for struct using -m64 https://github.com/dlang/druntime/pull/2971