LU-JOHN c245d764b8 [CodeGen] Do not remove IMPLICIT_DEF unless all uses have undef flag added (#188133) ...

Do not remove IMPLICIT_DEF of a physreg unless all uses have an undef
flag added. Previously, only the first use instruction had undef flags
added. This will cause a failure in machine instruction verification.
Multi-instruction uses tested in AMDGPU/multi-use-implicit-def.mir and
X86/multi-use-implicit-def.mir.

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Signed-off-by: John Lu <John.Lu@amd.com>

2026-04-01 10:11:42 -05:00

6.6 KiB

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