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[AArch64] Handle extract_subvector(..., 0) in ISel.

Description

[AArch64] Handle extract_subvector(..., 0) in ISel.

Summary:
Lowering this pattern early to an EXTRACT_SUBREG was making it impossible to match larger patterns in tblgen that use extract_subvector(..., 0) as part of the their input pattern.

It seems like there will exist somewhere a better way of specifying this pattern over all relevant register value types, but I didn't manage to find it.

Reviewers: t.p.northover, jmolloy

Subscribers: aemerson, llvm-commits, rengolin

Differential Revision: http://reviews.llvm.org/D14207

Details

Committed
chatur01Nov 9 2015, 4:45 AM
Differential Revision
D14207: [AArch64] Handle extract_subvector(..., 0) in ISel.
Parents
rL252463: [EABI] Add Clang support for -meabi flag
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