Matt Arsenault 0e46b49de4 Reapply "RegisterCoalescer: Add implicit-def of super register when coalescing SUBREG_TO_REG"
This reverts commit c398fa009a47eb24f88383d5e911e59e70f8db86.

PPC backend was fixed in 2f82662ce901c6666fceb9c6c5e0de216a1c9667
2023-12-22 16:46:22 +07:00
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