[llvm-bugs] [Bug 91571] [BOLT] Bolt cannot correctly recognize tail calls on aarch64.

Thu, 09 May 2024 01:38:35 -0700

Issue 91571
Summary [BOLT] Bolt cannot correctly recognize tail calls on aarch64.
Labels BOLT
Assignees
Reporter YuanSha0 
    ![image](https://github.com/llvm/llvm-project/assets/81171521/4932dd9e-fce9-4fa4-9201-0136ddfeb601)
![image](https://github.com/llvm/llvm-project/assets/81171521/e9ad2013-1bcd-46d3-a9f0-dc4a281a7789)
![image](https://github.com/llvm/llvm-project/assets/81171521/a43d559b-28aa-4d08-abf5-a578020feddf)
I traced this function using GDB and found that the BR instruction is actually a tail call, but the result of BC.MIB->isTailCall() is false.

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