[llvm] [MachineLICM] Use `RegisterClassInfo::getRegPressureSetLimit` (PR #211715)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ml-opt-rel-x86-64` running on `ml-opt-rel-x86-64-b1` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/185/builds/56

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: Analysis/UniformityAnalysis/AMDGPU/irreducible/diverged-entry-basic.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/b/ml-opt-rel-x86-64-b1/build/bin/opt /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/Analysis/UniformityAnalysis/AMDGPU/irreducible/diverged-entry-basic.ll -mtriple amdgcn-- -passes='print<uniformity>' -disable-output 2>&1 | /b/ml-opt-rel-x86-64-b1/build/bin/FileCheck /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/Analysis/UniformityAnalysis/AMDGPU/irreducible/diverged-entry-basic.ll
# executed command: /b/ml-opt-rel-x86-64-b1/build/bin/opt /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/Analysis/UniformityAnalysis/AMDGPU/irreducible/diverged-entry-basic.ll -mtriple amdgcn-- '-passes=print<uniformity>' -disable-output
# executed command: /b/ml-opt-rel-x86-64-b1/build/bin/FileCheck /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/Analysis/UniformityAnalysis/AMDGPU/irreducible/diverged-entry-basic.ll
# .---command stderr------------
# | /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/Analysis/UniformityAnalysis/AMDGPU/irreducible/diverged-entry-basic.ll:9:10: error: CHECK: expected string not found in input
# | ; CHECK: depth=2: entries(S P) Q
# |          ^
# | <stdin>:6:27: note: scanning from here
# |  depth=1: entries(R P) S Q
# |                           ^
# | <stdin>:8:1: note: possible intended match here
# | BLOCK entry
# | ^
# | 
# | Input file: <stdin>
# | Check file: /b/ml-opt-rel-x86-64-b1/llvm-project/llvm/test/Analysis/UniformityAnalysis/AMDGPU/irreducible/diverged-entry-basic.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |            1: UniformityInfo for function 'divergent_cycle_1': 
# |            2: CYCLES ASSUMED DIVERGENT: 
# |            3:  depth=1: entries(R P) S Q 
# |            4: CYCLES WITH DIVERGENT EXIT: 
# |            5:  depth=2: entries(S P) Q 
# |            6:  depth=1: entries(R P) S Q 
# | check:9'0                              {   search range start (exclusive)
# | check:9'1                                  error: no match found in search range
# |            7:  
# |            8: BLOCK entry 
# | check:9'2     ?             possible intended match
# |            9: DEFINITIONS 
# |           10:  %cond.uni = icmp slt i32 %a, 0 
# |           11:  DIVERGENT: %tid = call i32 @llvm.amdgcn.workitem.id.x() 
# |           12:  DIVERGENT: %cond.div = icmp slt i32 %tid, 0 
# |           13: TERMINATORS 
# |            .
# |            .
# |            .
# |           48: DEFINITIONS 
# |           49:  %ee = add i32 %b, 1 
# |           50: TERMINATORS 
# |           51:  ret void 
...

```

</details>

https://github.com/llvm/llvm-project/pull/211715