mirror of
https://github.com/encounter/dawn-cmake.git
synced 2025-08-05 19:55:37 +00:00
a5d73ce965
This is a major reworking of this transform. The old transform code was getting unwieldy, with part of the complication coming from the handling of multiple return statements. By generating a wrapper function instead, we can avoid a lot of this complexity. The original entry point function is stripped of all shader IO attributes (as well as `stage` and `workgroup_size`), but the body is left unmodified. A new entry point wrapper function is introduced which calls the original function, packing/unpacking the shader inputs as necessary, and propagates the result to the corresponding shader outputs. The new code has been refactored to use a state object with the different parts of the transform split into separate functions, which makes it much more manageable. Fixed: tint:1076 Bug: tint:920 Change-Id: I3490a0ea7a3509a4e198ce730e476516649d8d96 Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/60521 Auto-Submit: James Price <jrprice@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: James Price <jrprice@google.com> Reviewed-by: Ben Clayton <bclayton@google.com>
83 lines
3.5 KiB
Plaintext
83 lines
3.5 KiB
Plaintext
; SPIR-V
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; Version: 1.3
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; Generator: Google Tint Compiler; 0
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; Bound: 46
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; Schema: 0
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OpCapability Shader
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %main "main" %tint_symbol %tint_symbol_1 %tint_symbol_5 %tint_symbol_6 %tint_symbol_3
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OpExecutionMode %main OriginUpperLeft
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OpName %tint_symbol "tint_symbol"
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OpName %tint_symbol_1 "tint_symbol_1"
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OpName %tint_symbol_3 "tint_symbol_3"
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OpName %tint_symbol_5 "tint_symbol_5"
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OpName %tint_symbol_6 "tint_symbol_6"
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OpName %FragIn "FragIn"
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OpMemberName %FragIn 0 "a"
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OpMemberName %FragIn 1 "mask"
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OpName %tint_symbol_7 "tint_symbol_7"
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OpName %tint_symbol_4 "tint_symbol_4"
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OpName %main "main"
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OpDecorate %tint_symbol Location 0
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OpDecorate %_arr_uint_uint_1 ArrayStride 4
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OpDecorate %tint_symbol_1 BuiltIn SampleMask
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OpDecorate %tint_symbol_3 Location 1
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OpDecorate %tint_symbol_5 Location 0
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OpDecorate %tint_symbol_6 BuiltIn SampleMask
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OpMemberDecorate %FragIn 0 Offset 0
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OpMemberDecorate %FragIn 1 Offset 4
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%float = OpTypeFloat 32
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%_ptr_Input_float = OpTypePointer Input %float
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%tint_symbol = OpVariable %_ptr_Input_float Input
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%uint = OpTypeInt 32 0
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%uint_1 = OpConstant %uint 1
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%_arr_uint_uint_1 = OpTypeArray %uint %uint_1
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%_ptr_Input__arr_uint_uint_1 = OpTypePointer Input %_arr_uint_uint_1
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%tint_symbol_1 = OpVariable %_ptr_Input__arr_uint_uint_1 Input
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%tint_symbol_3 = OpVariable %_ptr_Input_float Input
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%_ptr_Output_float = OpTypePointer Output %float
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%12 = OpConstantNull %float
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%tint_symbol_5 = OpVariable %_ptr_Output_float Output %12
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%_ptr_Output__arr_uint_uint_1 = OpTypePointer Output %_arr_uint_uint_1
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%15 = OpConstantNull %_arr_uint_uint_1
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%tint_symbol_6 = OpVariable %_ptr_Output__arr_uint_uint_1 Output %15
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%void = OpTypeVoid
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%FragIn = OpTypeStruct %float %uint
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%16 = OpTypeFunction %void %FragIn
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%int = OpTypeInt 32 1
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%int_0 = OpConstant %int 0
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%_ptr_Output_uint = OpTypePointer Output %uint
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%28 = OpTypeFunction %void
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%_ptr_Input_uint = OpTypePointer Input %uint
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%uint_0 = OpConstant %uint 0
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%bool = OpTypeBool
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%tint_symbol_7 = OpFunction %void None %16
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%tint_symbol_4 = OpFunctionParameter %FragIn
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%21 = OpLabel
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%22 = OpCompositeExtract %float %tint_symbol_4 0
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OpStore %tint_symbol_5 %22
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%26 = OpAccessChain %_ptr_Output_uint %tint_symbol_6 %int_0
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%27 = OpCompositeExtract %uint %tint_symbol_4 1
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OpStore %26 %27
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OpReturn
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OpFunctionEnd
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%main = OpFunction %void None %28
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%30 = OpLabel
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%31 = OpLoad %float %tint_symbol
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%33 = OpAccessChain %_ptr_Input_uint %tint_symbol_1 %int_0
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%34 = OpLoad %uint %33
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%35 = OpCompositeConstruct %FragIn %31 %34
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%36 = OpCompositeExtract %uint %35 1
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%38 = OpIEqual %bool %36 %uint_0
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OpSelectionMerge %40 None
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OpBranchConditional %38 %41 %40
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%41 = OpLabel
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%42 = OpFunctionCall %void %tint_symbol_7 %35
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OpReturn
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%40 = OpLabel
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%44 = OpLoad %float %tint_symbol_3
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%45 = OpCompositeConstruct %FragIn %44 %uint_1
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%43 = OpFunctionCall %void %tint_symbol_7 %45
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OpReturn
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OpFunctionEnd
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