Add sanity test for SPIR-V 1.6 modules.

Just verify that we don't blow up on these modules.

reference/shaders-no-opt/asm/comp/basic.spv16.asm.comp

@@ -0,0 +1,13 @@
+#version 450
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+
+layout(binding = 0, std430) buffer SSBO
+{
+    float values[];
+} _3;
+
+void main()
+{
+    _3.values[gl_GlobalInvocationID.x] += 2.0;
+}
+

shaders-no-opt/asm/comp/basic.spv16.asm.comp

@@ -0,0 +1,48 @@
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint GLCompute %main "main" %_ %gl_GlobalInvocationID
+               OpExecutionMode %main LocalSize 1 1 1
+               OpSource GLSL 450
+               OpName %main "main"
+               OpName %SSBO "SSBO"
+               OpMemberName %SSBO 0 "values"
+               OpName %_ ""
+               OpName %gl_GlobalInvocationID "gl_GlobalInvocationID"
+               OpDecorate %_runtimearr_float ArrayStride 4
+               OpMemberDecorate %SSBO 0 Offset 0
+               OpDecorate %SSBO Block
+               OpDecorate %_ DescriptorSet 0
+               OpDecorate %_ Binding 0
+               OpDecorate %gl_GlobalInvocationID BuiltIn GlobalInvocationId
+               OpDecorate %gl_WorkGroupSize BuiltIn WorkgroupSize
+       %void = OpTypeVoid
+          %3 = OpTypeFunction %void
+      %float = OpTypeFloat 32
+%_runtimearr_float = OpTypeRuntimeArray %float
+       %SSBO = OpTypeStruct %_runtimearr_float
+%_ptr_StorageBuffer_SSBO = OpTypePointer StorageBuffer %SSBO
+          %_ = OpVariable %_ptr_StorageBuffer_SSBO StorageBuffer
+        %int = OpTypeInt 32 1
+      %int_0 = OpConstant %int 0
+       %uint = OpTypeInt 32 0
+     %v3uint = OpTypeVector %uint 3
+%_ptr_Input_v3uint = OpTypePointer Input %v3uint
+%gl_GlobalInvocationID = OpVariable %_ptr_Input_v3uint Input
+     %uint_0 = OpConstant %uint 0
+%_ptr_Input_uint = OpTypePointer Input %uint
+    %float_2 = OpConstant %float 2
+%_ptr_StorageBuffer_float = OpTypePointer StorageBuffer %float
+     %uint_1 = OpConstant %uint 1
+%gl_WorkGroupSize = OpConstantComposite %v3uint %uint_1 %uint_1 %uint_1
+       %main = OpFunction %void None %3
+          %5 = OpLabel
+         %19 = OpAccessChain %_ptr_Input_uint %gl_GlobalInvocationID %uint_0
+         %20 = OpLoad %uint %19
+         %23 = OpAccessChain %_ptr_StorageBuffer_float %_ %int_0 %20
+         %24 = OpLoad %float %23
+         %25 = OpFAdd %float %24 %float_2
+         %26 = OpAccessChain %_ptr_StorageBuffer_float %_ %int_0 %20
+               OpStore %26 %25
+               OpReturn
+               OpFunctionEnd

spirv_parser.cpp

@@ -68,6 +68,7 @@ static bool is_valid_spirv_version(uint32_t version)
 	case 0x10300: // SPIR-V 1.3
 	case 0x10400: // SPIR-V 1.4
 	case 0x10500: // SPIR-V 1.5
+	case 0x10600: // SPIR-V 1.6
 		return true;
 
 	default:

test_shaders.py

@@ -516,8 +516,14 @@ def cross_compile(shader, vulkan, spirv, invalid_spirv, eliminate, is_legacy, fl
     spirv_path = create_temporary()
     glsl_path = create_temporary(os.path.basename(shader))
 
+    spirv_16 = '.spv16.' in shader
     spirv_14 = '.spv14.' in shader
-    spirv_env = 'vulkan1.1spv1.4' if spirv_14 else 'vulkan1.1'
+    if spirv_16:
+        spirv_env = 'spv1.6'
+    elif spirv_14:
+        spirv_env = 'vulkan1.1spv1.4'
+    else:
+        spirv_env = 'vulkan1.1'
 
     if vulkan or spirv:
         vulkan_glsl_path = create_temporary('vk' + os.path.basename(shader))