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[x86] split more v8f32/v8i32 shuffles in lowering

Authored by spatel on Feb 18 2019, 8:46 AM.

Description

[x86] split more v8f32/v8i32 shuffles in lowering

Similar to D57867 - this is a small patch with lots of test diffs.
With half-vector-width narrowing potential, using an extract + 128-bit vshufps
is a win because it replaces a 256-bit shuffle with a 128-bit shufle.

This seems like it should be a win even for targets with 'fast-variable-shuffle',
but we are intentionally deferring that to an independent change to make sure
that is true.

Differential Revision: https://reviews.llvm.org/D58181

llvm-svn: 354279

Details

Committed
spatelFeb 18 2019, 8:46 AM
Differential Revision
D58181: [x86] split more v8f32/v8i32 shuffles in lowering
Parents
rG9d800a135a74: Un-XFAIL TestLinuxCore for windows
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