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Create a local value numbering pass

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Creates a pass that removes redundant instructions within the same basic
block.  This will be implemented using a hash based value numbering
algorithm.

Added a number of functions that check for the Vulkan descriptor types.
These are used to determine if we are variables are read-only or not.

Implemented a function to check if loads and variables are read-only.
Implemented kernel specific and shader specific versions.

A big change is that the Combinator analysis in ADCE is factored out
into the IRContext as an analysis. This was done because it is being
reused in the value number table.
This commit is contained in:
Steven Perron
2017-11-10 20:26:55 -05:00
parent f407ae2b50
commit 28c415500d
22 changed files with 1780 additions and 307 deletions
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source/opcode.cpp
+56 -1
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@@ -318,7 +318,7 @@ int32_t spvOpcodeGeneratesType(SpvOp op) {
}
bool spvOpcodeIsDecoration(const SpvOp opcode) {
switch(opcode) {
switch (opcode) {
case SpvOpDecorate:
case SpvOpDecorateId:
case SpvOpMemberDecorate:
@@ -330,3 +330,58 @@ bool spvOpcodeIsDecoration(const SpvOp opcode) {
}
return false;
}
bool spvOpcodeIsLoad(const SpvOp opcode) {
switch (opcode) {
case SpvOpLoad:
case SpvOpImageSampleExplicitLod:
case SpvOpImageSampleImplicitLod:
case SpvOpImageSampleDrefImplicitLod:
case SpvOpImageSampleDrefExplicitLod:
case SpvOpImageSampleProjImplicitLod:
case SpvOpImageSampleProjExplicitLod:
case SpvOpImageSampleProjDrefImplicitLod:
case SpvOpImageSampleProjDrefExplicitLod:
case SpvOpImageFetch:
case SpvOpImageGather:
case SpvOpImageDrefGather:
case SpvOpImageRead:
case SpvOpImageSparseSampleImplicitLod:
case SpvOpImageSparseSampleExplicitLod:
case SpvOpImageSparseSampleDrefExplicitLod:
case SpvOpImageSparseSampleDrefImplicitLod:
case SpvOpImageSparseFetch:
case SpvOpImageSparseGather:
case SpvOpImageSparseDrefGather:
case SpvOpImageSparseRead:
return true;
default:
return false;
}
}
bool spvOpcodeIsAtomicOp(const SpvOp opcode) {
switch (opcode) {
case SpvOpAtomicLoad:
case SpvOpAtomicStore:
case SpvOpAtomicExchange:
case SpvOpAtomicCompareExchange:
case SpvOpAtomicCompareExchangeWeak:
case SpvOpAtomicIIncrement:
case SpvOpAtomicIDecrement:
case SpvOpAtomicIAdd:
case SpvOpAtomicISub:
case SpvOpAtomicSMin:
case SpvOpAtomicUMin:
case SpvOpAtomicSMax:
case SpvOpAtomicUMax:
case SpvOpAtomicAnd:
case SpvOpAtomicOr:
case SpvOpAtomicXor:
case SpvOpAtomicFlagTestAndSet:
case SpvOpAtomicFlagClear:
return true;
default:
return false;
}
}