[llvm] [SelectionDAG] Utilizing target hook convertSelectOfConstantsToMath for SelectwithConstant (PR #127599)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-m68k-linux-cross` running on `suse-gary-m68k-cross` while building `llvm` at step 5 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/27/builds/6598

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (ninja check 1) failure: stage 1 checked (failure)
******************** TEST 'LLVM :: CodeGen/M68k/Control/setcc.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/llc < /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/CodeGen/M68k/Control/setcc.ll -mtriple=m68k-linux -verify-machineinstrs | /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/FileCheck /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/CodeGen/M68k/Control/setcc.ll
+ /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/llc -mtriple=m68k-linux -verify-machineinstrs
+ /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/stage1/bin/FileCheck /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/CodeGen/M68k/Control/setcc.ll
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/CodeGen/M68k/Control/setcc.ll:12:15: error: CHECK-NEXT: expected string not found in input
; CHECK-NEXT: shi %d0
              ^
<stdin>:10:16: note: scanning from here
 sub.l #26, %d0
               ^
<stdin>:13:8: note: possible intended match here
 moveq #0, %d0
       ^
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/CodeGen/M68k/Control/setcc.ll:28:15: error: CHECK-NEXT: expected string not found in input
; CHECK-NEXT: scs %d0
              ^
<stdin>:28:16: note: scanning from here
 sub.l #26, %d0
               ^
<stdin>:31:8: note: possible intended match here
 moveq #0, %d0
       ^
/var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/CodeGen/M68k/Control/setcc.ll:43:15: error: CHECK-NEXT: expected string not found in input
; CHECK-NEXT: moveq #0, %d2
              ^
<stdin>:45:44: note: scanning from here
 movem.l %d2, (0,%sp) ; 8-byte Folded Spill
                                           ^
<stdin>:47:2: note: possible intended match here
 moveq #0, %d0
 ^

Input file: <stdin>
Check file: /var/lib/buildbot/workers/suse-gary-m68k-cross/clang-m68k-linux-cross/llvm/llvm/test/CodeGen/M68k/Control/setcc.ll

-dump-input=help explains the following input dump.

Input was:
<<<<<<
           .
           .
           .
           5:  .type t1, at function 
           6: t1: ; @t1 
           7: ; %bb.0: ; %entry 
           8:  move.w (6,%sp), %d0 
...

```

</details>

https://github.com/llvm/llvm-project/pull/127599