GLSL: Unroll loads from builtin pos/point arrays.

Odd-ball case for certain geometry shaders coming from HLSL.

1 files changed, 102 insertions, 0 deletions

diff --git a/shaders/asm/geom/unroll-glposition-load.asm.geom b/shaders/asm/geom/unroll-glposition-load.asm.geom
new file mode 100644
index 00000000..8c10de39
--- /dev/null
+++ b/shaders/asm/geom/unroll-glposition-load.asm.geom
@@ -0,0 +1,102 @@
+; SPIR-V
+; Version: 1.0
+; Generator: Khronos Glslang Reference Front End; 7
+; Bound: 55
+; Schema: 0
+               OpCapability Geometry
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Geometry %main "main" %OUT_pos %positions_1
+               OpExecutionMode %main Triangles
+               OpExecutionMode %main Invocations 1
+               OpExecutionMode %main OutputTriangleStrip
+               OpExecutionMode %main OutputVertices 3
+               OpSource HLSL 500
+               OpName %main "main"
+               OpName %SceneOut "SceneOut"
+               OpMemberName %SceneOut 0 "pos"
+               OpName %_main_vf4_3__struct_SceneOut_vf41_ "@main(vf4[3];struct-SceneOut-vf41;"
+               OpName %positions "positions"
+               OpName %OUT "OUT"
+               OpName %i "i"
+               OpName %o "o"
+               OpName %OUT_pos "OUT.pos"
+               OpName %positions_0 "positions"
+               OpName %positions_1 "positions"
+               OpName %OUT_0 "OUT"
+               OpName %param "param"
+               OpName %param_0 "param"
+               OpDecorate %OUT_pos BuiltIn Position
+               OpDecorate %positions_1 BuiltIn Position
+       %void = OpTypeVoid
+          %3 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+       %uint = OpTypeInt 32 0
+     %uint_3 = OpConstant %uint 3
+%_arr_v4float_uint_3 = OpTypeArray %v4float %uint_3
+%_ptr_Function__arr_v4float_uint_3 = OpTypePointer Function %_arr_v4float_uint_3
+   %SceneOut = OpTypeStruct %v4float
+%_ptr_Function_SceneOut = OpTypePointer Function %SceneOut
+         %14 = OpTypeFunction %void %_ptr_Function__arr_v4float_uint_3 %_ptr_Function_SceneOut
+        %int = OpTypeInt 32 1
+%_ptr_Function_int = OpTypePointer Function %int
+      %int_0 = OpConstant %int 0
+      %int_3 = OpConstant %int 3
+       %bool = OpTypeBool
+%_ptr_Function_v4float = OpTypePointer Function %v4float
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+    %OUT_pos = OpVariable %_ptr_Output_v4float Output
+      %int_1 = OpConstant %int 1
+%_ptr_Input__arr_v4float_uint_3 = OpTypePointer Input %_arr_v4float_uint_3
+%positions_1 = OpVariable %_ptr_Input__arr_v4float_uint_3 Input
+       %main = OpFunction %void None %3
+          %5 = OpLabel
+%positions_0 = OpVariable %_ptr_Function__arr_v4float_uint_3 Function
+      %OUT_0 = OpVariable %_ptr_Function_SceneOut Function
+      %param = OpVariable %_ptr_Function__arr_v4float_uint_3 Function
+    %param_0 = OpVariable %_ptr_Function_SceneOut Function
+         %48 = OpLoad %_arr_v4float_uint_3 %positions_1
+               OpStore %positions_0 %48
+         %51 = OpLoad %_arr_v4float_uint_3 %positions_0
+               OpStore %param %51
+         %53 = OpFunctionCall %void %_main_vf4_3__struct_SceneOut_vf41_ %param %param_0
+         %54 = OpLoad %SceneOut %param_0
+               OpStore %OUT_0 %54
+               OpReturn
+               OpFunctionEnd
+%_main_vf4_3__struct_SceneOut_vf41_ = OpFunction %void None %14
+  %positions = OpFunctionParameter %_ptr_Function__arr_v4float_uint_3
+        %OUT = OpFunctionParameter %_ptr_Function_SceneOut
+         %18 = OpLabel
+          %i = OpVariable %_ptr_Function_int Function
+          %o = OpVariable %_ptr_Function_SceneOut Function
+               OpStore %i %int_0
+               OpBranch %23
+         %23 = OpLabel
+               OpLoopMerge %25 %26 None
+               OpBranch %27
+         %27 = OpLabel
+         %28 = OpLoad %int %i
+         %31 = OpSLessThan %bool %28 %int_3
+               OpBranchConditional %31 %24 %25
+         %24 = OpLabel
+         %33 = OpLoad %int %i
+         %35 = OpAccessChain %_ptr_Function_v4float %positions %33
+         %36 = OpLoad %v4float %35
+         %37 = OpAccessChain %_ptr_Function_v4float %o %int_0
+               OpStore %37 %36
+         %40 = OpAccessChain %_ptr_Function_v4float %o %int_0
+         %41 = OpLoad %v4float %40
+               OpStore %OUT_pos %41
+               OpEmitVertex
+               OpBranch %26
+         %26 = OpLabel
+         %42 = OpLoad %int %i
+         %44 = OpIAdd %int %42 %int_1
+               OpStore %i %44
+               OpBranch %23
+         %25 = OpLabel
+               OpEndPrimitive
+               OpReturn
+               OpFunctionEnd