From: Matt Arsenault <Matthew.Arsenault@amd.com>
Date: Tue, 8 Sep 2015 19:54:32 +0000 (+0000)
Subject: AMDGPU: Mark s_barrier as a high latency instruction
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=55ec9f281ce3348a1a08792d96a34034ab19442d;hp=55ec9f281ce3348a1a08792d96a34034ab19442d

AMDGPU: Mark s_barrier as a high latency instruction

These were marked as WriteSALU, which is low latency.
I'm guessing at the value to use, but it should probably
be considered the highest latency instruction.

I'm not sure this has any actual effect since hasSideEffects
probably is preventing any moving of these.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247060 91177308-0d34-0410-b5e6-96231b3b80d8
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