Petar Avramovic 838d5d371a AMDGPU/GlobalISel: Fix combine crash because LI is not set in prelegalizer ...

Caused by legacy min/max combines (select + cmp) asking for legalizer info
in prelegalizer (D135047 added combine to all_combines).
Combine still does not work for AMDGPU since destination opcode is custom,
not legal. Similar combine works on DAG since it asks for legal or custom.

Differential Revision: https://reviews.llvm.org/D137274

2022-11-08 12:46:16 +01:00

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