Merge pull request #17227 from cjjdespres/body-info-docs

Fully distinguish body info address relocations

doc/compiler/aot/RelocationRecords.md

@@ -95,8 +95,8 @@ exact type of the API class for each relocation kind can be found in
 |`TR_AbsoluteMethodAddressOrderedPair`|Relocates an address that is within the method being compiled. The exact method of relocation depends on the sequence enum specified.|
 |`TR_FixedSequenceAddress`|Only used on POWER. Relocates the load of a 64 bit address of a label in the method being compiled. The exact method of relocation depends on the sequence enum specified.|
 |`TR_FixedSequenceAddress2`|Relocates the load of an address in the method being compiled. The exact method of relocation depends on the sequence enum specified.|
-|`TR_BodyInfoAddress`|Relocates the address to the `TR_PersistentJittedBodyInfo` for the method being compiled. This is mainly used to relocate the address to the recompilation counter, which is the first field of the `TR_PersistentJittedBodyInfo`. Also relocates some fields, as well as the `TR_PersistentMethodInfo`.|
-|`TR_BodyInfoAddressLoad`|Relocates the address to the `TR_PersistentJittedBodyInfo` for the method being compiled. Like `TR_BodyInfoAddress`, this is mainly used to relocate the address of the recompilation counter, which is the first field of the `TR_PersistentJittedBodyInfo`.|
+|`TR_BodyInfoAddress`|Relocates the address to the `TR_PersistentJittedBodyInfo` for the method being compiled. This is used to relocate that address in the method's preprologue, and is also used on X and Z to relocate the address to the recompilation counter, which is the first field of the `TR_PersistentJittedBodyInfo`. Also relocates some fields, as well as the `TR_PersistentMethodInfo`.|
+|`TR_BodyInfoAddressLoad`|Relocates the address to the `TR_PersistentJittedBodyInfo` for the method being compiled. This is only used on Power and ARM, and only to relocate loads from the address of the recompilation counter, which is the first field of the `TR_PersistentJittedBodyInfo`.|
 |`TR_CheckMethodEnter`|Patches the code if method enter tracing is enabled. Note, the AOT code should have been compiled with the assumption that tracing could be enabled.|
 |`TR_CheckMethodExit`|Patches the code if method enter tracing is enabled. Note, the AOT code should have been compiled with the assumption that tracing could be enabled.|
 |`TR_JNIVirtualTargetAddress`|Relocates the start address of a virtual JNI method.|