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Luo, Yuanke 44ff98c17b [X86] Pass to transform amx intrinsics to scalar operation.
This pass runs in any situations but we skip it when it is not O0 and the
function doesn't have optnone attribute. With -O0, the def of shape to amx
intrinsics is near the amx intrinsics code. We are not able to find a
point which post-dominate all the shape and dominate all amx intrinsics.
To decouple the dependency of the shape, we transform amx intrinsics
to scalar operation, so that compiling doesn't fail. In long term, we
 should improve fast register allocation to allocate amx register.

Reviewed By: pengfei

Differential Revision: https://reviews.llvm.org/D93594
2021-03-05 16:02:02 +08:00
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