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author	Simon Pilgrim <llvm-dev@redking.me.uk>
	Fri, 21 Oct 2022 09:39:57 +0000 (10:39 +0100)
committer	Simon Pilgrim <llvm-dev@redking.me.uk>
	Fri, 21 Oct 2022 09:40:13 +0000 (10:40 +0100)
commit	5ca77541446d7040638b53e0ddff3f76ee005681
tree	dcb14b0b789f6d662985ae77445cd163ef103296	tree \| snapshot
parent	daf067da04c98ce666f67ba2b3beed4cf4be7549	commit \| diff

[X86] Fold scalar_to_vector(i64 zext(x)) -> bitcast(vzext_movl(scalar_to_vector(i32 x)))

Extends existing anyextend fold to make use of the implicit zero-extension of the movd instruction

This also helps replace some nasty xmm->gpr->xmm traffic with a shuffle pattern instead

Noticed while looking at D130953

Domain: System / Toolchain;

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llvm/lib/Target/X86/X86ISelLowering.cpp		diff \| blob \| history
llvm/test/CodeGen/X86/buildvec-extract.ll		diff \| blob \| history
llvm/test/CodeGen/X86/combine-pmuldq.ll		diff \| blob \| history
llvm/test/CodeGen/X86/fast-isel-bitcast-crash.ll		diff \| blob \| history
llvm/test/CodeGen/X86/gather-addresses.ll		diff \| blob \| history
llvm/test/CodeGen/X86/insertelement-var-index.ll		diff \| blob \| history
llvm/test/CodeGen/X86/load-scalar-as-vector.ll		diff \| blob \| history
llvm/test/CodeGen/X86/vec_insert-7.ll		diff \| blob \| history
llvm/test/CodeGen/X86/vec_set-B.ll		diff \| blob \| history
llvm/test/CodeGen/X86/vector-shuffle-combining-xop.ll		diff \| blob \| history