Amir Ayupov 19941b0468 [BOLT] Use MCInstPrinter in createRetpolineFunctionTag ...

Make retpoline functions invariant of X86 register numbers.
retpoline-synthetic.test is known to fail NFC testing due to shifting
register numbers. Use canonical register names instead of tablegen
numbers.

Before:
```
__retpoline_r51_
__retpoline_mem_r58+DATAat0x200fe8
__retpoline_mem_r51+0
__retpoline_mem_r132+0+8*53
```

After:
```
__retpoline_%rax_
__retpoline_mem_%rip+DATAat0x200fe8
__retpoline_mem_%rax+0
__retpoline_mem_%r12+0+8*%rbx
```

Test Plan:
- Revert 67bd3c58c0 that touches X86RegisterInfo.td.
- retpoline-synthetic.test passes in NFC mode with this diff, fails without it.

Reviewed By: #bolt, rafauler

Differential Revision: https://reviews.llvm.org/D150138

2023-05-08 18:50:49 -07:00

11 KiB

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