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aco: try to always find a register with stride for even sizes

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Totals from affected shaders:
SGPRS: 1162400 -> 1162400 (0.00 %)
VGPRS: 947364 -> 946960 (-0.04 %)
Code Size: 98399300 -> 98399004 (-0.00 %) bytes
Max Waves: 74665 -> 74682 (0.02 %)

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4573>
This commit is contained in:
Daniel Schürmann
2020-04-15 11:00:45 +01:00
committed by Marge Bot
parent 5a3c1f4f0b
commit d666d83be2
1 changed files with 4 additions and 2 deletions
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src/amd/compiler/aco_register_allocation.cpp
+4 -2
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@@ -395,8 +395,10 @@ std::pair<PhysReg, bool> get_reg_simple(ra_ctx& ctx,
if (stride == 1) {
if (rc.type() == RegType::vgpr && (size == 4 || size == 8)) {
info.stride = 4;
for (unsigned stride = 8; stride > 1; stride /= 2) {
if (size % stride)
continue;
info.stride = stride;
std::pair<PhysReg, bool> res = get_reg_simple(ctx, reg_file, info);
if (res.second)
return res;