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2f9a98870e
The resolver now wraps sem::Expression objects with a sem::Load object anywhere that the load rule is invoked. sem::Expression provides an `UnwrapLoad()` method that returns the inner expression (or passthrough, if no load is present), which is analaguous to Type::UnwrapRef(). The logic for alias analysis in `RegisterLoadIfNeeded` has been folded into the new `Resolver::Load` method. Fixed up many transforms and tests. The only difference in output is for a single SPIR-V backend test, where some IDs have changed due to slight re-ordering of when expressions are generated. There may be further clean-ups possible (e.g. removing unnecessary calls to `UnwrapRef`, and simplifying places in the SPIR-V writer or transforms that deal with memory accesses), but these can be addressed in future patches. Fixed: tint:1654 Change-Id: I69adecfe9251faae46546b64d0cdc29eea26cd4e Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/99706 Commit-Queue: James Price <jrprice@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Antonio Maiorano <amaiorano@google.com> Reviewed-by: Ben Clayton <bclayton@google.com>
33 lines
1.1 KiB
Plaintext
33 lines
1.1 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: 20
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; Schema: 0
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OpCapability Shader
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OpMemoryModel Logical GLSL450
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OpEntryPoint GLCompute %main "main"
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OpExecutionMode %main LocalSize 1 1 1
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OpName %main "main"
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OpName %v "v"
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%void = OpTypeVoid
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%1 = OpTypeFunction %void
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%float = OpTypeFloat 32
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%v3float = OpTypeVector %float 3
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%_ptr_Function_v3float = OpTypePointer Function %v3float
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%9 = OpConstantNull %v3float
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%uint = OpTypeInt 32 0
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%uint_1 = OpConstant %uint 1
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%_ptr_Function_float = OpTypePointer Function %float
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%v2float = OpTypeVector %float 2
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%main = OpFunction %void None %1
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%4 = OpLabel
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%v = OpVariable %_ptr_Function_v3float Function %9
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%13 = OpAccessChain %_ptr_Function_float %v %uint_1
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%14 = OpLoad %float %13
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%15 = OpLoad %v3float %v
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%17 = OpVectorShuffle %v2float %15 %15 0 2
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%18 = OpLoad %v3float %v
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%19 = OpVectorShuffle %v3float %18 %18 0 2 1
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OpReturn
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OpFunctionEnd
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