acae607703
This is required to avoid relying on complex sub-expression elimination in compilers, and generates cleaner code. The problem case is if a complex expression is used in an access chain, like: Composite comp = buffer[texture(...)]; vec4 a = comp.a + comp.b + comp.c; Before, we did not have common subexpression tracking for OpLoad/OpAccessChain, so we easily ended up with code like: vec4 a = buffer[texture(...)].a + buffer[texture(...)].b + buffer[texture(...)].c; A good compiler will optimize this, but we should not rely on it, and forcing texture(...) to a temporary also looks better. The solution is to add a vector "implied_expression_reads", which works similarly to expression_dependencies. We also need an extra mechanism in to_expression which lets us skip expression read checking and do it later. E.g. for expr -> access chain -> load, we should only trigger a read of expr when using the loaded expression.
30 lines
661 B
GLSL
30 lines
661 B
GLSL
#include <metal_stdlib>
|
|
#include <simd/simd.h>
|
|
|
|
using namespace metal;
|
|
|
|
struct UBO
|
|
{
|
|
float4 results[1024];
|
|
};
|
|
|
|
struct main0_out
|
|
{
|
|
float4 FragColor [[color(0)]];
|
|
};
|
|
|
|
struct main0_in
|
|
{
|
|
int vIn [[user(locn0)]];
|
|
int vIn2 [[user(locn1)]];
|
|
};
|
|
|
|
fragment main0_out main0(main0_in in [[stage_in]], device UBO& _34 [[buffer(0)]], texture2d<int> Buf [[texture(1)]], sampler BufSmplr [[sampler(1)]], float4 gl_FragCoord [[position]])
|
|
{
|
|
main0_out out = {};
|
|
int _40 = Buf.read(uint2(int2(gl_FragCoord.xy)), 0).x % 16;
|
|
out.FragColor = (_34.results[_40] + _34.results[_40]) + _34.results[(in.vIn * in.vIn) + (in.vIn2 * in.vIn2)];
|
|
return out;
|
|
}
|
|
|