Stanislav Mekhanoshin 22a56f2f5a [AMDGPU] Add VGPR copies post regalloc fix pass ...

Regalloc creates COPY instructions which do not formally use VALU.
That results in v_mov instructions displaced after exec mask modification.
One pass which do it is SIOptimizeExecMasking, but potentially it can be
done by other passes too.

This patch adds a pass immediately after regalloc to add implicit exec
use operand to all VGPR copy instructions.

Differential Revision: https://reviews.llvm.org/D28874

llvm-svn: 292956

2017-01-24 17:46:17 +00:00

1.9 KiB

Raw Blame History

View Raw