dawn-cmake/test/tint/bug/tint/1703.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

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#include <metal_stdlib>
using namespace metal;
struct tint_private_vars_struct {
float4 my_global;
};
void foo_member_initialize(thread tint_private_vars_struct* const tint_private_vars, const constant float* const tint_symbol, texture2d<float, access::sample> tint_symbol_1, sampler tint_symbol_2) {
bool2 vb2 = false;
vb2[0] = ((*(tint_private_vars)).my_global[2] != 0.0f);
vb2[0] = (*(tint_symbol) == -1.0f);
vb2 = bool2((*(tint_symbol) == -1.0f), false);
if (vb2[0]) {
float4 const r = tint_symbol_1.sample(tint_symbol_2, float2(0.0f), bias(0.0f));
}
}
void foo_default_initialize(thread tint_private_vars_struct* const tint_private_vars, const constant float* const tint_symbol_3, texture2d<float, access::sample> tint_symbol_4, sampler tint_symbol_5) {
bool2 vb2 = false;
vb2[0] = ((*(tint_private_vars)).my_global[2] != 0.0f);
vb2[0] = (*(tint_symbol_3) == -1.0f);
vb2 = bool2(false);
if (vb2[0]) {
float4 const r = tint_symbol_4.sample(tint_symbol_5, float2(0.0f), bias(0.0f));
}
}