<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Issue</th>
<td>
<a href=https://github.com/llvm/llvm-project/issues/152102>152102</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>
[BOLT][AArch64] When the --frame-opt=hot option is enabled, AArch64MCPlusBuilder does not implement the getPushSize API
</td>
</tr>
<tr>
<th>Labels</th>
<td>
BOLT
</td>
</tr>
<tr>
<th>Assignees</th>
<td>
</td>
</tr>
<tr>
<th>Reporter</th>
<td>
whousemyname
</td>
</tr>
</table>
<pre>
### Problem description
When using bolt to optimize a shared library file of aarch64, if the option frame-opt=hot is enabled, the release version will crash directly, and the debug version will show not implemented
### The output generated by compilation
```
BOLT-INFO: program-wide dynostats after all optimizations before SCTC and FOP:
20554242536 : executed forward branches
1853550662 : taken forward branches
8456055324 : executed backward branches
7085108608 : taken backward branches
752751874 : executed unconditional branches
1783127868 : all function calls
528206474 : indirect calls
190048784 : PLT calls
200007176370 : executed instructions
29587649281 : executed load instructions
0 : executed store instructions
0 : taken jump table branches
0 : taken unknown indirect branches
29763049734 : total branches
9691411144 : taken branches
20071638590 : non-taken conditional branches
8938659270 : taken conditional branches
29010297860 : all conditional branches
0 : linker-inserted veneer calls
16753640491 : executed forward branches (-18.5%)
774667346 : taken forward branches (-58.2%)
12256657369 : executed backward branches (+44.9%)
7083218995 : taken backward branches (-0.0%)
515286541 : executed unconditional branches (-31.5%)
1783127868 : all function calls (=)
528206474 : indirect calls (=)
190048784 : PLT calls (=)
197898710201 : executed instructions (-1.1%)
29587649281 : executed load instructions (=)
0 : executed store instructions (=)
0 : taken jump table branches (=)
0 : taken unknown indirect branches (=)
29525584401 : total branches (-0.8%)
8373172882 : taken branches (-13.6%)
21152411519 : non-taken conditional branches (+5.4%)
7857886341 : taken conditional branches (-12.1%)
29010297860 : all conditional branches (=)
0 : linker-inserted veneer calls (=)
BOLT-INFO: Finished pass: print dyno-stats after optimizations
BOLT-INFO: Starting pass: simplify-conditional-tail-calls
BOLT-INFO: Finished pass: simplify-conditional-tail-calls
BOLT-INFO: Starting pass: peepholes
BOLT-INFO: Peephole: 114 double jumps patched.
BOLT-INFO: Peephole: 814 tail call traps inserted.
BOLT-INFO: Peephole: 0 useless conditional branches removed.
BOLT-INFO: Finished pass: peepholes
BOLT-INFO: Starting pass: aligner
BOLT-INFO: Finished pass: aligner
BOLT-INFO: Starting pass: reorder-data
BOLT-INFO: Finished pass: reorder-data
BOLT-INFO: Starting pass: adr-relaxation
BOLT-INFO: Finished pass: adr-relaxation
BOLT-INFO: Starting pass: long-jmp
BOLT-INFO: Starting stub-insertion pass
BOLT-INFO: Inserted 30963 stubs in the hot area and 11310 stubs in the cold area. Shared 0 times, iterated 3 times.
BOLT-INFO: Finished pass: long-jmp
BOLT-INFO: Starting pass: finalize-functions
BOLT-INFO: Finished pass: finalize-functions
BOLT-INFO: Starting pass: frame-optimizer
BOLT-INFO: buildCallGraph: 63578 nodes, 341627 callsites (859 recursive), density = 0.000042, 77720 callsites not processed, 10164 callsites with invalid profile, used perf data for 0 stale functions.
not implemented
UNREACHABLE executed at bolt/include/bolt/Core/MCPlusBuilder.h:597!
not implemented
UNREACHABLE executed at bolt/include/bolt/Core/MCPlusBuilder.h:597!
not implemented
UNREACHABLE executed at bolt/include/bolt/Core/MCPlusBuilder.h:597!
[2] 4158564 abort (core dumped) ./llvm-bolt -o --keep-nops --reorder-blocks=ext-tsp --split-functions
```
### Question
Does bolt support the activation of frame-opt option under the AArch64 architecture?
</pre>
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