Fix OCL builtins translation in case SPV_KHR_untyped_pointers is enabled #2723
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This change allows to preserve the correct builtin mangling in reverse translation.
| ; RUN: llvm-spirv -r %t.spv -o %t.rev.bc | ||
| ; RUN: llvm-dis %t.rev.bc -o - | FileCheck %s --check-prefix=CHECK-LLVM | ||
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| ; RUN: llvm-spirv %t.bc -o %t.spv --spirv-ext=+SPV_KHR_untyped_pointers |
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How did you pick this file to do additional testing with SPV_KHR_untyped_pointers?
Please add a comment explaining why this additional testing was added.
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Actually I'm just running all the tests with the extension enabled and trying to understand where the real fixes should be made, or where we just need to update Checks.
This one is testing OCL builtin so I've checked if we are working fine with them when the extension enabled (turned out that not).
Will add the comment about additional testing though.
| @@ -4757,6 +4757,17 @@ Instruction *SPIRVToLLVM::transOCLBuiltinFromExtInst(SPIRVExtInst *BC, | |||
| "Not OpenCL extended instruction"); | |||
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| std::vector<Type *> ArgTypes = transTypeVector(BC->getArgTypes(), true); | |||
| for (unsigned I = 0; I < ArgTypes.size(); I++) { | |||
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Does function transBuiltinFromInst() also need this special handling? It also calls transTypeVector() and gets a mangled name. Consider putting this special processing within transTypeVector().
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My experiments show that e.g. for OpEnqueKernel we don't meet untyped variables in arguments, but the mangling is still wrong - should be fixed elsewhere.
It's still possible to unify this fix inside transTypeVector(), but not sure if it'd be used by transBuiltinFromInst().
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I'm fine with the merge as is for now. In general we probably should implement the following algorithm:
- translate SPIR-V pointer type as LLVM's Typed pointer
- get the mangling
- 'opaquefy' the pointer to construct the function and call instruction
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This change allows to preserve the correct builtin mangling in reverse translation.