https://llvm.org/bugs/show_bug.cgi?id=30894
Bug ID: 30894
Summary: Tonga Unreal elemental bad rendering since AMDGPU:
Default to using scalar mov to materialize immediate
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: AMDGPU
Assignee: unassignedb...@nondot.org
Reporter: adf.li...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 17546
--> https://llvm.org/bugs/attachment.cgi?id=17546&action=edit
bdd shaders bz2
R9285 since below commit unreal elemental demo has some rendering artifacts in
the form of some of the scene having square blocks flashing. Not all scenes
affected, only a small percentage of affected scenes (eg.the first one) have
the squares.
Attaching good and bad R600_DEBUG=vs,ps,fs
commit e9a23c4c57a235ead3003196c1ae1de05aa79fc6
Author: Matt Arsenault <matthew.arsena...@amd.com>
Date: Tue Nov 1 22:55:07 2016 +0000
AMDGPU: Default to using scalar mov to materialize immediate
This is the conservatively correct way because it's easy to
move or replace a scalar immediate. This was incorrect in the case
when the register class wasn't known from the static instruction
definition, but still needed to be an SGPR. The main example of this
is inlineasm has an SGPR constraint.
Also start verifying the register classes of inlineasm operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285762
91177308-0d34-0410-b5e6-96231b3b80d8
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