skia2/tests/sksl/shared/ConstArray.metal
John Stiles 76c1ff1566 Optimize indexing into an array with a constant-expression.
Previously, SkSL was unable to resolve the constant expression `x[y]`
for a constant-array `x` and a constant-integer-scalar `y`. Now, if `x`
and `y` are known, we can replace `x[y]` with the indexed array element.

Note that we need to be careful here, as it's not a valid optimization
to eliminate array elements that have side effects. We preserve side-
effecting expressions using the comma operator.

Change-Id: I5721337eb42b48c0b05f919c1cadfae19dd3b84f
Bug: skia:12472
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/469839
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2021-11-10 19:43:58 +00:00

15 lines
379 B
Metal

#include <metal_stdlib>
#include <simd/simd.h>
using namespace metal;
struct Inputs {
};
struct Outputs {
half4 sk_FragColor [[color(0)]];
};
fragment Outputs fragmentMain(Inputs _in [[stage_in]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) {
Outputs _out;
(void)_out;
_out.sk_FragColor = half4(0.0h, 1.0h, 0.0h, 1.0h);
return _out;
}