[LLVM] Auto-convert shuffle with single index to "extract element" #6006
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July 7, 2020 11:42
Data types with a single lane are treated as scalars in TVM. On the other hand, in LLVM there is a difference between a scalar type and a vector type with a single lane. Because of that, a shuffle with a single index is equivalent to extracting an element in TIR, but not in the generated LLVM IR. This patch changes the LLVM codegen for shuffle to auto-convert single-lane vectors to scalars.
tqchen
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Jul 8, 2020
trevor-m
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Jul 14, 2020
…pache#6006) * [LLVM] Auto-convert shuffle with single index to "extract element" Data types with a single lane are treated as scalars in TVM. On the other hand, in LLVM there is a difference between a scalar type and a vector type with a single lane. Because of that, a shuffle with a single index is equivalent to extracting an element in TIR, but not in the generated LLVM IR. This patch changes the LLVM codegen for shuffle to auto-convert single-lane vectors to scalars. * Try another build
trevor-m
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that referenced
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Jul 14, 2020
…pache#6006) * [LLVM] Auto-convert shuffle with single index to "extract element" Data types with a single lane are treated as scalars in TVM. On the other hand, in LLVM there is a difference between a scalar type and a vector type with a single lane. Because of that, a shuffle with a single index is equivalent to extracting an element in TIR, but not in the generated LLVM IR. This patch changes the LLVM codegen for shuffle to auto-convert single-lane vectors to scalars. * Try another build
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Data types with a single lane are treated as scalars in TVM. On the other hand, in LLVM there is a difference between a scalar type and a vector type with a single lane. Because of that, a shuffle with a single index is equivalent to extracting an element in TIR, but not in the generated LLVM IR. This patch changes the LLVM codegen for shuffle to auto-convert single-lane vectors to scalars.