dawn-cmake/test/tint/expressions/swizzle/write/vec3/f32.wgsl.expected.msl
James Price 0e22bdbae7 tint/msl: Fix emission of private variables
In order to avoid declaring too many function parameters, we
previously modified this transform to redeclare private variables that
are only used inside a single function as function-scope
variables. This was broken as it meant that their values did not
persist across multiple calls to the same function.

Instead, wrap all private variables in a structure and pass it around
as a pointer.

Fixed: tint:1875
Change-Id: I83f5eb1071d57b9c6af56d6cf21b3a32c6e94260
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/124800
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: James Price <jrprice@google.com>
2023-03-20 21:46:01 +00:00

19 lines
367 B
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#include <metal_stdlib>
using namespace metal;
struct S {
float3 v;
};
struct tint_private_vars_struct {
S P;
};
void f(thread tint_private_vars_struct* const tint_private_vars) {
(*(tint_private_vars)).P.v = float3(1.0f, 2.0f, 3.0f);
(*(tint_private_vars)).P.v[0] = 1.0f;
(*(tint_private_vars)).P.v[1] = 2.0f;
(*(tint_private_vars)).P.v[2] = 3.0f;
}