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tint/writer/msl: Generate an array<T,N> helper

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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>
This commit is contained in:
Ben Clayton
2022-06-24 17:01:59 +00:00
committed by Dawn LUCI CQ
parent 3c054304a8
commit f47887d207
218 changed files with 3637 additions and 2269 deletions
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22
test/tint/buffer/storage/static_index/read.wgsl.expected.msl
View File

@@ -12,12 +12,20 @@ inline vec<T, N> operator*(packed_vec<T, M> lhs, matrix<T, N, M> rhs) {
return vec<T, M>(lhs) * rhs;
}
struct Inner {
/* 0x0000 */ int x;
template<typename T, size_t N>
struct tint_array {
const constant T& operator[](size_t i) const constant { return elements[i]; }
device T& operator[](size_t i) device { return elements[i]; }
const device T& operator[](size_t i) const device { return elements[i]; }
thread T& operator[](size_t i) thread { return elements[i]; }
const thread T& operator[](size_t i) const thread { return elements[i]; }
threadgroup T& operator[](size_t i) threadgroup { return elements[i]; }
const threadgroup T& operator[](size_t i) const threadgroup { return elements[i]; }
T elements[N];
};
struct tint_array_wrapper {
/* 0x0000 */ Inner arr[4];
struct Inner {
/* 0x0000 */ int x;
};
struct S {
@@ -30,8 +38,8 @@ struct S {
/* 0x0030 */ float2x3 g;
/* 0x0050 */ float3x2 h;
/* 0x0068 */ Inner i;
/* 0x006c */ tint_array_wrapper j;
/* 0x007c */ int8_t tint_pad[4];
/* 0x006c */ tint_array<Inner, 4> j;
/* 0x007c */ tint_array<int8_t, 4> tint_pad;
};
kernel void tint_symbol(const device S* tint_symbol_1 [[buffer(0)]]) {
@@ -44,7 +52,7 @@ kernel void tint_symbol(const device S* tint_symbol_1 [[buffer(0)]]) {
float2x3 const g = (*(tint_symbol_1)).g;
float3x2 const h = (*(tint_symbol_1)).h;
Inner const i = (*(tint_symbol_1)).i;
tint_array_wrapper const j = (*(tint_symbol_1)).j;
tint_array<Inner, 4> const j = (*(tint_symbol_1)).j;
return;
}

22
test/tint/buffer/storage/static_index/write.wgsl.expected.msl
View File

@@ -12,12 +12,20 @@ inline vec<T, N> operator*(packed_vec<T, M> lhs, matrix<T, N, M> rhs) {
return vec<T, M>(lhs) * rhs;
}
struct Inner {
/* 0x0000 */ int x;
template<typename T, size_t N>
struct tint_array {
const constant T& operator[](size_t i) const constant { return elements[i]; }
device T& operator[](size_t i) device { return elements[i]; }
const device T& operator[](size_t i) const device { return elements[i]; }
thread T& operator[](size_t i) thread { return elements[i]; }
const thread T& operator[](size_t i) const thread { return elements[i]; }
threadgroup T& operator[](size_t i) threadgroup { return elements[i]; }
const threadgroup T& operator[](size_t i) const threadgroup { return elements[i]; }
T elements[N];
};
struct tint_array_wrapper {
/* 0x0000 */ Inner arr[4];
struct Inner {
/* 0x0000 */ int x;
};
struct S {
@@ -30,8 +38,8 @@ struct S {
/* 0x0030 */ float2x3 g;
/* 0x0050 */ float3x2 h;
/* 0x0068 */ Inner i;
/* 0x006c */ tint_array_wrapper j;
/* 0x007c */ int8_t tint_pad[4];
/* 0x006c */ tint_array<Inner, 4> j;
/* 0x007c */ tint_array<int8_t, 4> tint_pad;
};
kernel void tint_symbol(device S* tint_symbol_3 [[buffer(0)]]) {
@@ -45,7 +53,7 @@ kernel void tint_symbol(device S* tint_symbol_3 [[buffer(0)]]) {
(*(tint_symbol_3)).h = float3x2(float2(0.0f), float2(0.0f), float2(0.0f));
Inner const tint_symbol_1 = {};
(*(tint_symbol_3)).i = tint_symbol_1;
tint_array_wrapper const tint_symbol_2 = {.arr={}};
tint_array<Inner, 4> const tint_symbol_2 = tint_array<Inner, 4>{};
(*(tint_symbol_3)).j = tint_symbol_2;
return;
}