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f47887d207
And remove the WrapArraysInStructs transform. Wrapping arrays in structures becomes troublesome for `const` arrays, as currently WGSL does not allow `const` structures. MSL 2.0+ has a builtin array<> helper, but we're targetting MSL 1.2, so we have to emit our own. Fortunately, it can be done with a few lines of templated code. This produces significantly cleaner output. Change-Id: Ifc92ef21e09befa252a07c856c4b5afdc51cc2e4 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/94540 Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Ben Clayton <bclayton@chromium.org> Reviewed-by: David Neto <dneto@google.com>
39 lines
1.2 KiB
Plaintext
39 lines
1.2 KiB
Plaintext
#include <metal_stdlib>
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using namespace metal;
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template<typename T, size_t N>
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struct tint_array {
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const constant T& operator[](size_t i) const constant { return elements[i]; }
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device T& operator[](size_t i) device { return elements[i]; }
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const device T& operator[](size_t i) const device { return elements[i]; }
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thread T& operator[](size_t i) thread { return elements[i]; }
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const thread T& operator[](size_t i) const thread { return elements[i]; }
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threadgroup T& operator[](size_t i) threadgroup { return elements[i]; }
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const threadgroup T& operator[](size_t i) const threadgroup { return elements[i]; }
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T elements[N];
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};
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float f1(tint_array<float, 4> a) {
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return a[3];
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}
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float f2(tint_array<tint_array<float, 4>, 3> a) {
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return a[2][3];
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}
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float f3(tint_array<tint_array<tint_array<float, 4>, 3>, 2> a) {
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return a[1][2][3];
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}
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kernel void tint_symbol() {
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tint_array<float, 4> const a1 = tint_array<float, 4>{};
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tint_array<tint_array<float, 4>, 3> const a2 = tint_array<tint_array<float, 4>, 3>{};
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tint_array<tint_array<tint_array<float, 4>, 3>, 2> const a3 = tint_array<tint_array<tint_array<float, 4>, 3>, 2>{};
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float const v1 = f1(a1);
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float const v2 = f2(a2);
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float const v3 = f3(a3);
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return;
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}
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