Merge 6b70c5d79fe44cbe01b0443454c6952c5b541585 into 18.1.x

[brad0]

[PowerPC] provide CFI for ELF32 to unwind cr2, cr3, cr4
(#83098)

Delete the code that skips the CFI for the condition register on ELF32.
The code checked !MustSaveCR, which happened only when
Subtarget.is32BitELFABI(), where spillCalleeSavedRegisters is spilling
cr in a different way. The spill was missing CFI. After deleting this
code, a spill of cr2 to cr4 gets CFI in the same way as a spill of r14
to r31.

Fixes #83094

[brad0]

/cherry-pick 6b70c5d

[llvmbot]

@llvm/issue-subscribers-backend-powerpc

Author: Brad Smith (brad0)

[PowerPC] provide CFI for ELF32 to unwind cr2, cr3, cr4 (#83098)

Delete the code that skips the CFI for the condition register on ELF32.
The code checked !MustSaveCR, which happened only when
Subtarget.is32BitELFABI(), where spillCalleeSavedRegisters is spilling
cr in a different way. The spill was missing CFI. After deleting this
code, a spill of cr2 to cr4 gets CFI in the same way as a spill of r14
to r31.

Fixes #83094

[llvmbot]

Failed to cherry-pick: 6b70c5d

https://github.com/llvm/llvm-project/actions/runs/8399216034

Please manually backport the fix and push it to your github fork. Once this is done, please create a pull request

[brad0]

/cherry-pick 3196005 6b70c5d

[llvmbot]

/pull-request #86375