SPIRV-Cross/reference/shaders-msl/asm/comp/multiple-entry.asm.comp
Chip Davis 058f1a0933 MSL: Handle coherent, volatile, and restrict.
This maps them to their MSL equivalents. I've mapped `Coherent` to
`volatile` since MSL doesn't have anything weaker than `volatile` but
stronger than nothing.

As part of this, I had to remove the implicit `volatile` added for
atomic operation casts. If the buffer is already `coherent` or
`volatile`, then we would add a second `volatile`, which would be
redundant. I think this is OK even when the buffer *doesn't* have
`coherent`: `T *` is implicitly convertible to `volatile T *`, but not
vice-versa. It seems to compile OK at any rate. (Note that the
non-`volatile` overloads of the atomic functions documented in the spec
aren't present in the MSL 2.2 stdlib headers.)

`restrict` is tricky, because in MSL, as in C++, it needs to go *after*
the asterisk or ampersand for the pointer type it's modifying.

Another issue is that, in the `Simple`, `GLSL450`, and `Vulkan` memory
models, `Restrict` is the default (i.e. does not need to be specified);
but MSL likely follows the `OpenCL` model where `Aliased` is the
default. We probably need to implicitly set either `Restrict` or
`Aliased` depending on the module's declared memory model.
2019-07-11 10:22:30 -05:00

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#include <metal_stdlib>
#include <simd/simd.h>
using namespace metal;
struct _6
{
int4 _m0;
uint4 _m1;
};
struct _7
{
uint4 _m0;
int4 _m1;
};
kernel void main0(device _6& restrict _8 [[buffer(0)]], device _7& restrict _9 [[buffer(1)]])
{
_9._m0 = _8._m1 + uint4(_8._m0);
_9._m0 = uint4(_8._m0) + _8._m1;
_9._m0 = _8._m1 + _8._m1;
_9._m0 = uint4(_8._m0 + _8._m0);
_9._m1 = int4(_8._m1 + _8._m1);
_9._m1 = _8._m0 + _8._m0;
_9._m1 = int4(_8._m1) + _8._m0;
_9._m1 = _8._m0 + int4(_8._m1);
}