<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/100922>100922</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            BOLT could not find corresponding %pcrel_hi on RISC-V
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            BOLT
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          renndong
      </td>
    </tr>
</table>

<pre>
    I'm trying to optimize a rust program using BOLT on RISC-V, but I get an error `<unknown>:0: error: could not find corresponding %pcrel_hi`.

This is the command that I execute:

```
llvm-bolt <executable> -o <output> -data=perf.fdata -reorder-blocks=ext-tsp -reorder-functions=hfsort -split-functions -split-all-cold -split-eh -dyno-stats
```

and the BOLT version and rust compiler version I use are:

```
$ llvm-bolt --version
LLVM (http://llvm.org/):
  LLVM version 19.0.0git
 Optimized build with assertions.
BOLT revision 3d72c44fedc13ef51d2584b4fe930edb8d2e87ae

  Registered Targets:
 riscv32 - 32-bit RISC-V
    riscv64 - 64-bit RISC-V
$ rustc -v -V
rustc 1.77.2 (25ef9e3d8 2024-04-09)
binary: rustc
commit-hash: 25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04
commit-date: 2024-04-09
host: riscv64gc-unknown-linux-gnu
release: 1.77.2
LLVM version: 17.0.6
```

The output of BOLT is as follows:

<details>

<summary>Output</summary>

```
BOLT-INFO: shared object or position-independent executable detected
BOLT-INFO: Target architecture: riscv64
BOLT-INFO: BOLT version: 3d72c44fedc13ef51d2584b4fe930edb8d2e87ae
BOLT-INFO: first alloc address is 0x0
BOLT-INFO: creating new program header table at address 0x200000, offset 0x200000
BOLT-WARNING: debug info will be stripped from the binary. Use -update-debug-sections to keep it.
BOLT-INFO: enabling relocation mode
BOLT-INFO: disabling -align-macro-fusion on non-x86 platform
BOLT-WARNING: Failed to analyze 41 relocations
BOLT-INFO: pre-processing profile using branch profile reader
BOLT-INFO: operating with basic samples profiling data (no LBR).
BOLT-INFO: normalizing samples by instruction count.
BOLT-INFO: 83 out of 640 functions in the binary (13.0%) have non-empty execution profile
BOLT-INFO: basic block reordering modified layout of 38 functions (45.78% of profiled, 5.41% of total)
BOLT-INFO: UCE removed 4 blocks and 8 bytes of code
BOLT-INFO: 0 Functions were reordered by LoopInversionPass
BOLT-INFO: program-wide dynostats after all optimizations before SCTC and FOP:

 276799252 : executed forward branches
            83592209 : taken forward branches
            19175433 : executed backward branches
 1975284 : taken backward branches
           230588915 : executed unconditional branches
           217290399 : all function calls
 217290399 : indirect calls
                   0 : PLT calls
 5363549217 : executed instructions
          1360261461 : executed load instructions
          1652341608 : executed store instructions
 0 : taken jump table branches
                   0 : taken unknown indirect branches
           526563600 : total branches
 316156408 : taken branches
           210407192 : non-taken conditional branches
            85567493 : taken conditional branches
 295974685 : all conditional branches

           286282669 : executed forward branches (+3.4%)
             6522058 : taken forward branches (-92.2%)
             9692016 : executed backward branches (-49.5%)
 6625161 : taken backward branches (+235.4%)
            11381856 : executed unconditional branches (-95.1%)
           217290399 : all function calls (=)
             1324278 : indirect calls (-99.4%)
 0 : PLT calls (=)
          4735678411 : executed instructions (-11.7%)
          1360261461 : executed load instructions (=)
          1652341608 : executed store instructions (=)
 0 : taken jump table branches (=)
                   0 : taken unknown indirect branches (=)
           307356541 : total branches (-41.6%)
            24529075 : taken branches (-92.2%)
 282827466 : non-taken conditional branches (+34.4%)
            13147219 : taken conditional branches (-84.6%)
           295974685 : all conditional branches (=)

<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
<unknown>:0: error: could not find corresponding %pcrel_hi
BOLT-ERROR: Emission failed.
```

</details>
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsWUlv3DoS_jXypSCBIrUe-pB4GRjwxIGf35vjgBJL3UwkUSApL_n1A1LqzVHbfsCcHloIOhFZ9dWir6oUkRsj1z3iKki_BunVBR_tRumVxr4Xql9fVEq8rm4Dmndg9avs12AVqMHKTv5C4KBHY2HQaq15B6NxAl_v7x5B9fBw-8dl-FdAL6EaLdzCGi3wHlBrpSHISMAux_5nr577gF0H7AsJ2Jdp1_2jVmMroFcWGtkLqJXWaAbVC2cioOlQa2z_u5FBRqKAXAXky_T7uJEGpAG7QahV1_FegN1w5wC-YD1aDNiXQwXnyfTH37btUxdWqrUQsMtJg1ctBuwaQuXW1GiH0fp7wS0P2NWAuokadwOhRqUF6rBqVf3TBOwKX2xozbDfaca-tlL1bnPTGKUthGZopd3vbBd424a1asX2HjcQitdehcZyaxbdn36noHF6FE-ojVQ9uEX_uGrVDbJFvdu5hdEgcP1BagKawD49YTirT5t3d3_9GwJabKwdHAy9CeiNk46UXvu7cocO4KW35uMyIhFZSzvv3s_0ElCNshXwLO0GuDGofXbmx-1j0_gkPQYTOa2TpEFRxwybNBY0LZIqabBkBEVVCIpFzvEwPIAHXEtjUaOAR67XaM3eRy1N_cQohMBoWEm75fOsCpNAlkAIWfKbgMuVS3YN4RNsF6eFOMrziLpc0RSbEpkogBKahCQJSeny5IUr2XP96krBq02LjtHShhtuNm5nB5CKkiUVzUUpuOC0KYVIaRWLOmNVRZIjZcF9DRza9NsbZaw3N8W1rsO5PMNW9uNLuO7HOQxskRuPMcVywIAtJ9xeHpEoe4eljxuEqZpANRNXpQFuoFFtq57NWzayS4GWy9a4fnG8Ycau89m6vp_L8zKgN_vVd1jt7Ia3327unc9mwx0ZVPUDawtKw6CMdKwLZS9wwF5gb2HfFkCgxdqiWMCaGAVc1xvphEZfX9v0LigcVqu7_3ucPoJqpDYWeNuqGrgQGo1viuRlKehaI7eurfb4vOvlG-QCNUxRcrtDIS-UuMv1ddU0Bu1-aQ_9ny8P326__cuhC6zGNci-UfAs2xYqBGO1HAYU0GjV-UY1kT2CPw1COA6OoqFXDA3OPdEq-Ik4gLTRQgzY86p1MWhsVc2dCnRKLOVGSDPLhryV6z7seK1V2Iy-kageetWHL0UGQ8tto3S3HNcNly0K5xbvefv6CyGJD6ybBcuDxnDQqkbjB-WgVSNbnMdmpXlfb3aL2ud_AUQNqKfH5ftixY2swfBuaNHM2m7Tj6OAFr2Cu68PAS2XstYr3fFW_nIKW4jqFWRvrB593t0c7hczXjBXvK5ys4TAfnbJ_uCJOg9iFpGApgEtYcOf0KcXu8G-znXkrMxRL5iZ4vPjFOYR6rztlJCNRAEtf53dYMWBFwEtkjTKi4Cmbm_GF461aZTE87JVlre7jntk98_La9DYqScUkEz2jR-hBVSvFo1Tr5cJRuBm58czatz67QbaK9wpNdz2c5l_52aZKL4Iw2cpENzE9wMfeGNRu6revoFNTIMKG6UR_rh8vPQu3tx_f9M7geZZXpY0peCrZXoTEtAo_cy1mMmHZj_dtlfB0pJSUno9y39i_wmluIzzNGHs2FjF659LinGZp7RIDiycktxflJG0KMo4PTYx9rV7RXRp4e072nFOS8LKKSqX0C1zoOZtu1U4FpO9kNqNhUOR3y_ihb_fPR7JpSxjaVLSOD92-KDUfoOMWUZoFidZfKzTKv6BYpZSlsQZKY4VjXU0WdAkB7n_MXbD3PZPP-CjWCe9-WVhn6aT2inN0oxlZNZ2NfhWmMVZnGbJHMBMitNPkyQkj8uJ2669TAqfogIUaZrlSckOLL2jSMu0zJOsSHfMOS38u6NFRguaZeX7ReiaV0C_siiZ2uZC-rOUUpIW7xSlAwlLGtGTGGVWUhJnH9Sox0nKKD3CyTKaxjMvT5TsHAVl6ek44pgVcZFmnyniKaA0ik-AfVTT3h92tZyLmNGE5sVCnU9myzcxvCny09hJztIsL5I4Pl333kQcR_lyZJ9uA6e9-HxD-A3jg9bwblb_RpN4B4cRl8M0iRfaxcTOOMpOMYwmKS1Jni70keUKoQUtaJ5k2SeaybZQk3cYzuIkp3H5QXfxvhTJyTg-13beJnH336P_x3eWM9YZ64x1xjpjnbHOWGesM9YZ64z1D8PyXyGvHx7uH5zudSeN_yje-G_d0TtnOdOBy_585kKsmChZyS9wFeeUxhnJk-Jis4pjkhVFSiukTcZEVmZpXBUUc4Yxq2hxIVeU0ITktCBlWpIiyinPyjIpyjJhpK5FkBDsuGyj7enihTRmxFVMSEnpRcsrbI0_z6bUxRNQGqRXF3o1nV2OaxMkpJXGmj2ClbbFlT-A-WzC9kfcF6NuVxtrB7M7-FxLuxmrqFbdfAo6_xUOWv3A2gb0xjttAnoz-_20ov8LAAD__9OMspk">