Thomas Symalla 1a6aa8b195 [AMDGPU] Add missing use check in SIOptimizeExecMasking pass. ...

Whenever a v_cmp, s_and_saveexec instruction sequence shall be
transformed to an equivalent s_mov, v_cmpx sequence, it needs
to be detected if the v_cmp target register is used between
the two instructions as the v_cmp result gets omitted by
using the v_cmpx instruction, resulting in invalid code.

Reviewed By: foad

Differential Revision: https://reviews.llvm.org/D122797

2022-03-31 19:25:35 +02:00

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