[llvm] [DA] Fix overflow of findBounds* in BanerjeeTest (PR #191232)

[via llvm-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 172411 tests passed
* 3134 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### LLVM
<details>
<summary>LLVM.Transforms/LoopInterchange/inner-indvar-depend-on-outer-indvar.ll</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/opt < /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopInterchange/inner-indvar-depend-on-outer-indvar.ll -passes=loop-interchange -verify-dom-info -verify-loop-info -S 2>&1 | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopInterchange/inner-indvar-depend-on-outer-indvar.ll
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/opt -passes=loop-interchange -verify-dom-info -verify-loop-info -S
# note: command had no output on stdout or stderr
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopInterchange/inner-indvar-depend-on-outer-indvar.ll
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopInterchange/inner-indvar-depend-on-outer-indvar.ll:17:15: error: CHECK-NEXT: is not on the line after the previous match
# | ; CHECK-NEXT: br label %[[FOR1_HEADER:.*]]
# |               ^
# | <stdin>:14:2: note: 'next' match was here
# |  br label %for2
# |  ^
# | <stdin>:12:13: note: previous match ended here
# | for1.header: ; preds = %for1.inc10, %entry
# |             ^
# | <stdin>:13:1: note: non-matching line after previous match is here
# |  %i = phi i64 [ 0, %entry ], [ %i.next, %for1.inc10 ]
# | ^
# | 
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/Transforms/LoopInterchange/inner-indvar-depend-on-outer-indvar.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |          .
# |          .
# |          .
# |          9:  %0 = load i64, ptr @N, align 4 
# |         10:  br label %for1.header 
# |         11:  
# |         12: for1.header: ; preds = %for1.inc10, %entry 
# |         13:  %i = phi i64 [ 0, %entry ], [ %i.next, %for1.inc10 ] 
# |         14:  br label %for2 
# | next:17      !~~~~~~~~~~~~~  error: match on wrong line
# |         15:  
# |         16: for2: ; preds = %for2, %for1.header 
# |         17:  %j = phi i64 [ %j.next, %for2 ], [ 0, %for1.header ] 
# |         18:  %arrayidx5 = getelementptr inbounds [100 x [100 x i64]], ptr @A, i64 0, i64 %j, i64 %i 
# |         19:  %lv = load i64, ptr %arrayidx5, align 4 
# |          .
# |          .
# |          .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/191232