SPIRV-Cross/reference/shaders/asm/vert/spec-constant-op-composite.asm.vk.vert
Hans-Kristian Arntzen d92de00cc1 Rewrite how IDs are iterated over.
This is a fairly fundamental change on how IDs are handled.
It serves many purposes:

- Improve performance. We only need to iterate over IDs which are
  relevant at any one time.
- Makes sure we iterate through IDs in SPIR-V module declaration order
  rather than ID space. IDs don't have to be monotonically increasing,
  which was an assumption SPIRV-Cross used to have. It has apparently
  never been a problem until now.
- Support LUTs of structs. We do this by interleaving declaration of
  constants and struct types in SPIR-V module order.

To support this, the ParsedIR interface needed to change slightly.
Before setting any ID with variant_set<T> we let ParsedIR know
that an ID with a specific type has been added. The surface for change
should be minimal.

ParsedIR will maintain a per-type list of IDs which the cross-compiler
will need to consider for later.

Instead of looping over ir.ids[] (which can be extremely large), we loop
over types now, using:

ir.for_each_typed_id<SPIRVariable>([&](uint32_t id, SPIRVariable &var) {
	handle_variable(var);
});

Now we make sure that we're never looking at irrelevant types.
2019-01-10 12:52:56 +01:00

35 lines
846 B
GLSL

#version 450
#ifndef SPIRV_CROSS_CONSTANT_ID_201
#define SPIRV_CROSS_CONSTANT_ID_201 -10
#endif
const int _7 = SPIRV_CROSS_CONSTANT_ID_201;
const int _20 = (_7 + 2);
#ifndef SPIRV_CROSS_CONSTANT_ID_202
#define SPIRV_CROSS_CONSTANT_ID_202 100u
#endif
const uint _8 = SPIRV_CROSS_CONSTANT_ID_202;
const uint _25 = (_8 % 5u);
const ivec4 _30 = ivec4(20, 30, _20, _20);
const ivec2 _32 = ivec2(_30.y, _30.x);
const int _33 = _30.y;
#ifndef SPIRV_CROSS_CONSTANT_ID_200
#define SPIRV_CROSS_CONSTANT_ID_200 3.141590118408203125
#endif
const float _9 = SPIRV_CROSS_CONSTANT_ID_200;
layout(location = 0) flat out int _4;
void main()
{
vec4 pos = vec4(0.0);
pos.y += float(_20);
pos.z += float(_25);
pos += vec4(_30);
vec2 _56 = pos.xy + vec2(_32);
pos = vec4(_56.x, _56.y, pos.z, pos.w);
gl_Position = pos;
_4 = _33;
}