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[AMDGPU] Support for v3i32/v3f32

Description

[AMDGPU] Support for v3i32/v3f32

Added support for dwordx3 for most load/store types, but not DS, and not
intrinsics yet.

SI (gfx6) does not have dwordx3 instructions, so they are not enabled
there.

Some of this patch is from Matt Arsenault, also of AMD.

Differential Revision: https://reviews.llvm.org/D58902

Change-Id: I913ef54f1433a7149da8d72f4af54dbb13436bd9

Details

Committed
tprMar 21 2019, 5:01 AM
Differential Revision
D58902: [AMDGPU] Support for v3i32/v3f32
Parents
rL356658: Fix -Wmisleading-indentation gcc7 warning. NFCI.
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