dawn-cmake/test/tint/bug/dawn/947.wgsl.expected.msl

bug/dawn/947.wgsl:59:20 warning: 'textureSample' must only be called from uniform control flow
    var srcColor = textureSample(myTexture, mySampler, texcoord);
                   ^^^^^^^^^^^^^

bug/dawn/947.wgsl:55:5 note: control flow depends on non-uniform value
    if (!all(clampedTexcoord == texcoord)) {
    ^^

bug/dawn/947.wgsl:55:33 note: reading from user-defined input 'texcoord' may result in a non-uniform value
    if (!all(clampedTexcoord == texcoord)) {
                                ^^^^^^^^

#include <metal_stdlib>

using namespace metal;

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 Uniforms {
  /* 0x0000 */ float2 u_scale;
  /* 0x0008 */ float2 u_offset;
};

struct VertexOutputs {
  float2 texcoords;
  float4 position;
};

struct tint_symbol {
  float2 texcoords [[user(locn0)]];
  float4 position [[position]];
};

VertexOutputs vs_main_inner(uint VertexIndex, const constant Uniforms* const tint_symbol_5) {
  tint_array<float2, 3> texcoord = tint_array<float2, 3>{float2(-0.5f, 0.0f), float2(1.5f, 0.0f), float2(0.5f, 2.0f)};
  VertexOutputs output = {};
  output.position = float4(((texcoord[VertexIndex] * 2.0f) - float2(1.0f)), 0.0f, 1.0f);
  bool flipY = ((*(tint_symbol_5)).u_scale[1] < 0.0f);
  if (flipY) {
    output.texcoords = ((((texcoord[VertexIndex] * (*(tint_symbol_5)).u_scale) + (*(tint_symbol_5)).u_offset) * float2(1.0f, -1.0f)) + float2(0.0f, 1.0f));
  } else {
    output.texcoords = ((((texcoord[VertexIndex] * float2(1.0f, -1.0f)) + float2(0.0f, 1.0f)) * (*(tint_symbol_5)).u_scale) + (*(tint_symbol_5)).u_offset);
  }
  return output;
}

vertex tint_symbol vs_main(const constant Uniforms* tint_symbol_6 [[buffer(0)]], uint VertexIndex [[vertex_id]]) {
  VertexOutputs const inner_result = vs_main_inner(VertexIndex, tint_symbol_6);
  tint_symbol wrapper_result = {};
  wrapper_result.texcoords = inner_result.texcoords;
  wrapper_result.position = inner_result.position;
  return wrapper_result;
}

struct tint_symbol_2 {
  float2 texcoord [[user(locn0)]];
};

struct tint_symbol_3 {
  float4 value [[color(0)]];
};

float4 fs_main_inner(float2 texcoord, thread bool* const tint_symbol_7, texture2d<float, access::sample> tint_symbol_8, sampler tint_symbol_9) {
  float2 clampedTexcoord = clamp(texcoord, float2(0.0f), float2(1.0f));
  if (!(all((clampedTexcoord == texcoord)))) {
    *(tint_symbol_7) = true;
    return float4(0.0f);
  }
  float4 srcColor = tint_symbol_8.sample(tint_symbol_9, texcoord);
  return srcColor;
}

void tint_discard_func() {
  discard_fragment();
}

fragment tint_symbol_3 fs_main(texture2d<float, access::sample> tint_symbol_11 [[texture(0)]], sampler tint_symbol_12 [[sampler(0)]], tint_symbol_2 tint_symbol_1 [[stage_in]]) {
  thread bool tint_symbol_10 = false;
  float4 const inner_result_1 = fs_main_inner(tint_symbol_1.texcoord, &(tint_symbol_10), tint_symbol_11, tint_symbol_12);
  if (tint_symbol_10) {
    tint_discard_func();
    tint_symbol_3 const tint_symbol_4 = {};
    return tint_symbol_4;
  }
  tint_symbol_3 wrapper_result_1 = {};
  wrapper_result_1.value = inner_result_1;
  return wrapper_result_1;
}