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skia2/tests/sksl/shared/golden/GaussianBlur.metal
John Stiles 77702f1704 Eliminate inliner temporary variables for top-level-exit functions. 
When we determine that a function only contains a single return
statement and it is at the top level (i.e. not inside any scopes),
there is no need to create a temporary variable and store the
result expression into a variable. Instead, we can directly replace
the function-call expression with the return-statement's expression.

Unlike my previous solution, this does not require variable
declarations to be rewritten. The no-scopes limitation makes it
slightly less effective in theory, but in practice we still get
almost all of the benefit. The no-scope limitation bites us on
structures like

@if (true) {
    return x;
} else {
    return y;
}

Which will optimize away the if, but leave the scope:

{
    return x;
}

However, this is not a big deal; the biggest wins are single-line
helper functions like `guarded_divide` and `unpremul` which retain
the full benefit.

Change-Id: I7fbb725e65db021b9795c04c816819669815578f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/345167
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2020-12-17 20:37:21 +00:00

137 lines
8.2 KiB
Metal
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#include <metal_stdlib>
#include <simd/simd.h>
using namespace metal;
struct Inputs {
float2 vLocalCoord_Stage0 [[user(locn0)]];
};
struct Outputs {
float4 sk_FragColor [[color(0)]];
};
struct uniformBuffer {
float4 sk_RTAdjust;
float2 uIncrement_Stage1_c0;
char pad0[8];
float4 uKernel_Stage1_c0[7];
float3x3 umatrix_Stage1_c0_c0;
float4 uborder_Stage1_c0_c0_c0;
float4 usubset_Stage1_c0_c0_c0;
float4 unorm_Stage1_c0_c0_c0;
};
struct Globals {
constant uniformBuffer* _anonInterface0;
texture2d<float> uTextureSampler_0_Stage1;
sampler uTextureSampler_0_Stage1Smplr;
};
float4 MatrixEffect_Stage1_c0_c0(thread Globals* _globals, float4 _input, float2 _coords) {
float2 _1_coords = (_globals->_anonInterface0->umatrix_Stage1_c0_c0 * float3(_coords, 1.0)).xy;
float2 _2_inCoord = _1_coords;
_2_inCoord *= _globals->_anonInterface0->unorm_Stage1_c0_c0_c0.xy;
float2 _3_subsetCoord;
_3_subsetCoord.x = _2_inCoord.x;
_3_subsetCoord.y = _2_inCoord.y;
float2 _4_clampedCoord;
_4_clampedCoord = _3_subsetCoord;
float4 _5_textureColor = _globals->uTextureSampler_0_Stage1.sample(_globals->uTextureSampler_0_Stage1Smplr, _4_clampedCoord * _globals->_anonInterface0->unorm_Stage1_c0_c0_c0.zw);
float _6_snappedX = floor(_2_inCoord.x + 0.0010000000474974513) + 0.5;
if (_6_snappedX < _globals->_anonInterface0->usubset_Stage1_c0_c0_c0.x || _6_snappedX > _globals->_anonInterface0->usubset_Stage1_c0_c0_c0.z) {
_5_textureColor = _globals->_anonInterface0->uborder_Stage1_c0_c0_c0;
}
return _5_textureColor;
}
fragment Outputs fragmentMain(Inputs _in [[stage_in]], texture2d<float> uTextureSampler_0_Stage1[[texture(0)]], sampler uTextureSampler_0_Stage1Smplr[[sampler(0)]], constant uniformBuffer& _anonInterface0 [[buffer(0)]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) {
Globals globalStruct{&_anonInterface0, uTextureSampler_0_Stage1, uTextureSampler_0_Stage1Smplr};
thread Globals* _globals = &globalStruct;
(void)_globals;
Outputs _outputStruct;
thread Outputs* _out = &_outputStruct;
float4 output_Stage1;
float4 _8_output;
_8_output = float4(0.0, 0.0, 0.0, 0.0);
float2 _9_coord = _in.vLocalCoord_Stage0 - 12.0 * _globals->_anonInterface0->uIncrement_Stage1_c0;
float2 _10_coordSampled = float2(0.0, 0.0);
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[0].x;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[0].y;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[0].z;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[0].w;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[1].x;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[1].y;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[1].z;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[1].w;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[2].x;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[2].y;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[2].z;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[2].w;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[3].x;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[3].y;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[3].z;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[3].w;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[4].x;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[4].y;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[4].z;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[4].w;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[5].x;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[5].y;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[5].z;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[5].w;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
_10_coordSampled = _9_coord;
_8_output += MatrixEffect_Stage1_c0_c0(_globals, float4(1.0), _10_coordSampled) * _globals->_anonInterface0->uKernel_Stage1_c0[6].x;
_9_coord += _globals->_anonInterface0->uIncrement_Stage1_c0;
output_Stage1 = _8_output;
{
_out->sk_FragColor = output_Stage1;
}
return *_out;
}
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