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https://github.com/rafaelauler approved this pull request.
LGTM
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llvmbot wrote:
@llvm/pr-subscribers-bolt
Author: Amir Ayupov (aaupov)
Changes
Intel's Architectural LBR supports capturing branch type information
as part of LBR stack (SDM Vol 3B, part 2, October 2024):
```
20.1.3.2 Branch Types
The IA32_LBR_x_INFO.BR_TYPE and IA32_LER_INFO.BR_TYPE fields
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https://github.com/llvm/llvm-project/pull/143296
perf can preserve branch type when `save_type` is enabled. This
information is especially valuable for branches from outside the binary
when BOLT can't disassemble the branch source.
This patch adds new pre-aggre
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