zhijian lin 6127f15e5b [PowerPC] option -msoft-float should not block the PC-relative address instruction (#92543) ...

The Prefix instruction is introduced on PowerPC ISA3_1.

In the PR,  
1. The `FeaturePrefixInstrs` do not imply the `FeatureP8Vector`
,`FeatureP9Vector` .
2. `FeaturePrefixInstrs`  implies only the FeatureISA3_1.
3. For the prefix instructions `paddi` and `pli` , they have `Predicates
= [PrefixInstrs] `
4. For the prefix instructions `plfs` and `plfd`, they have `Predicates
= [PrefixInstrs, HasFPU] `
5. For the prefix instructions "plxv` , "plxssp` and `plxsd` , they have
`Predicates = [PrefixInstrs, HasP10Vector]`

Fixes #62372

2024-05-29 10:53:00 -04:00

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