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aco: prevent infinite recursion in RA for subdword variables

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Cc: 20.1 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6024>
(cherry picked from commit 4c89bfc4ec)
This commit is contained in:
Daniel Schürmann 2020-07-23 09:41:07 +02:00 • committed by Eric Engestrom
parent 692df26b7d
commit fcd612ba56
2 changed files with 2 additions and 2 deletions
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2
.pick_status.json
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@ -3910,7 +3910,7 @@
"description": "aco: prevent infinite recursion in RA for subdword variables",
"nominated": true,
"nomination_type": 0,
"resolution": 0,
"resolution": 1,
"master_sha": null,
"because_sha": null
},

2
src/amd/compiler/aco_register_allocation.cpp
View file

@ -396,7 +396,7 @@ std::pair<PhysReg, bool> get_reg_simple(ra_ctx& ctx,
}
if (stride == 1) {
info.rc = RegClass(rc.type(), size);
for (unsigned stride = 8; stride > 1; stride /= 2) {
if (size % stride)
continue;