Fix split access chains for builtin arrays.

reference/opt/shaders/asm/geom/split-access-chain-input.asm.geom

@@ -0,0 +1,9 @@
+#version 440
+layout(triangles) in;
+layout(max_vertices = 3, triangle_strip) out;
+
+void main()
+{
+    gl_Position = gl_in[0].gl_Position;
+}
+

reference/shaders/asm/geom/split-access-chain-input.asm.geom

@@ -0,0 +1,9 @@
+#version 440
+layout(triangles) in;
+layout(max_vertices = 3, triangle_strip) out;
+
+void main()
+{
+    gl_Position = gl_in[0].gl_Position;
+}
+

shaders/asm/geom/split-access-chain-input.asm.geom

@@ -0,0 +1,52 @@
+; SPIR-V
+; Version: 1.0
+; Generator: Khronos Glslang Reference Front End; 3
+; Bound: 23
+; Schema: 0
+               OpCapability Geometry
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Geometry %main "main" %gl_in
+               OpExecutionMode %main Triangles
+               OpExecutionMode %main Invocations 1
+               OpExecutionMode %main OutputTriangleStrip
+               OpExecutionMode %main OutputVertices 3
+               OpSource GLSL 440
+               OpName %main "main"
+               OpName %position "position"
+               OpName %gl_PerVertex "gl_PerVertex"
+               OpMemberName %gl_PerVertex 0 "gl_Position"
+               OpMemberName %gl_PerVertex 1 "gl_PointSize"
+               OpMemberName %gl_PerVertex 2 "gl_ClipDistance"
+               OpName %gl_in "gl_in"
+               OpMemberDecorate %gl_PerVertex 0 BuiltIn Position
+               OpMemberDecorate %gl_PerVertex 1 BuiltIn PointSize
+               OpMemberDecorate %gl_PerVertex 2 BuiltIn ClipDistance
+               OpDecorate %gl_PerVertex Block
+			   OpDecorate %position BuiltIn Position
+       %void = OpTypeVoid
+          %3 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+%_ptr_Function_v4float = OpTypePointer Output %v4float
+       %uint = OpTypeInt 32 0
+     %uint_1 = OpConstant %uint 1
+%_arr_float_uint_1 = OpTypeArray %float %uint_1
+%gl_PerVertex = OpTypeStruct %v4float %float %_arr_float_uint_1
+     %uint_3 = OpConstant %uint 3
+%_arr_gl_PerVertex_uint_3 = OpTypeArray %gl_PerVertex %uint_3
+%ptr_Input_gl_PerVertex = OpTypePointer Input %gl_PerVertex
+%_ptr_Input__arr_gl_PerVertex_uint_3 = OpTypePointer Input %_arr_gl_PerVertex_uint_3
+      %gl_in = OpVariable %_ptr_Input__arr_gl_PerVertex_uint_3 Input
+   %position = OpVariable %_ptr_Function_v4float Output
+        %int = OpTypeInt 32 1
+      %int_0 = OpConstant %int 0
+%_ptr_Input_v4float = OpTypePointer Input %v4float
+       %main = OpFunction %void None %3
+          %5 = OpLabel
+         %21 = OpAccessChain %ptr_Input_gl_PerVertex %gl_in %int_0
+         %22 = OpAccessChain %_ptr_Input_v4float %21 %int_0
+         %23 = OpLoad %v4float %22
+               OpStore %position %23
+               OpReturn
+               OpFunctionEnd

spirv_glsl.cpp

@@ -5051,7 +5051,7 @@ string CompilerGLSL::access_chain_internal(uint32_t base, const uint32_t *indice
 		type = &get<SPIRType>(type->parent_type);
 	}
 
-	bool access_chain_is_arrayed = false;
+	bool access_chain_is_arrayed = expr.find_first_of('[') != string::npos;
 	bool row_major_matrix_needs_conversion = is_non_native_row_major_matrix(base);
 	bool is_packed = has_decoration(base, DecorationCPacked);
 	bool pending_array_enclose = false;