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VideoCommon: Fix D3D shader warning X3557 (single iteration loop) 

Fix warning "loop only executes for 1 iteration(s), forcing loop to
unroll" when vertex_in == 1
This commit is contained in:
Dentomologist 2022-07-07 17:00:21 -07:00
parent 71541c1324
commit e1e0f42b37
1 changed files with 8 additions and 2 deletions
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10
Source/Core/VideoCommon/GeometryShaderGen.cpp
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@ -216,7 +216,11 @@ ShaderCode GenerateGeometryShaderCode(APIType api_type, const ShaderHostConfig&
if (wireframe)
out.Write("\tVS_OUTPUT first;\n");
out.Write("\tfor (int i = 0; i < {}; ++i) {{\n", vertex_in);
// Avoid D3D warning about forced unrolling of single-iteration loop
if (vertex_in > 1)
out.Write("\tfor (int i = 0; i < {}; ++i) {{\n", vertex_in);
else
out.Write("\tint i = 0;\n");
if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
{
@ -307,7 +311,9 @@ ShaderCode GenerateGeometryShaderCode(APIType api_type, const ShaderHostConfig&
EmitVertex(out, host_config, uid_data, "f", api_type, wireframe, stereo, true);
}
out.Write("\t}}\n");
// Only close loop if previous code was in one (See D3D warning above)
if (vertex_in > 1)
out.Write("\t}}\n");
EndPrimitive(out, host_config, uid_data, api_type, wireframe, stereo);