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Allow array size to be a module-scope constant

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Change ast::Array to use an ast::Expression for its `size` field. The
WGSL frontend now parses the array size as an `primary_expression`,
and the Resolver is responsible for validating the expression is a
signed or unsigned integer, and either a literal or a non-overridable
module-scope constant.

The Resolver evaluates the constant value of the size expression, and
so the resolved sem::Array type still has a constant size as before.

Fixed: tint:1068
Fixed: tint:1117

Change-Id: Icfa141482ea1e47ea8c21a25e9eb48221f176e9a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/63061
Auto-Submit: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: James Price <jrprice@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
This commit is contained in:
James Price
2021-09-02 13:49:59 +00:00
committed by Tint LUCI CQ
parent 69ce5f74ed
commit 4cc4315d6c
41 changed files with 861 additions and 261 deletions
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8
test/layout/storage/mat2x2/stride/16.spvasm.expected.wgsl
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@@ -1,16 +1,16 @@
[[block]]
struct SSBO {
m : [[stride(16)]] array<vec2<f32>, 2>;
m : [[stride(16)]] array<vec2<f32>, 2u>;
};
[[group(0), binding(0)]] var<storage, read_write> ssbo : SSBO;
fn arr_to_mat2x2_stride_16(arr : [[stride(16)]] array<vec2<f32>, 2>) -> mat2x2<f32> {
fn arr_to_mat2x2_stride_16(arr : [[stride(16)]] array<vec2<f32>, 2u>) -> mat2x2<f32> {
return mat2x2<f32>(arr[0u], arr[1u]);
}
fn mat2x2_stride_16_to_arr(mat : mat2x2<f32>) -> [[stride(16)]] array<vec2<f32>, 2> {
return [[stride(16)]] array<vec2<f32>, 2>(mat[0u], mat[1u]);
fn mat2x2_stride_16_to_arr(mat : mat2x2<f32>) -> [[stride(16)]] array<vec2<f32>, 2u> {
return [[stride(16)]] array<vec2<f32>, 2u>(mat[0u], mat[1u]);
}
fn f_1() {