[llvm-bugs] [Bug 37714] New: InstCombine: test/Transforms/InstCombine/call-guard.ll looks different with debug info present

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=37714

            Bug ID: 37714
           Summary: InstCombine: test/Transforms/InstCombine/call-guard.ll
                    looks different with debug info present
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: vsk at apple.com
                CC: llvm-bugs at lists.llvm.org

Running `opt -O1` on call-guard.ll produces different output with/without debug
info present. To reproduce the issue, do:

# Baseline
$ $OPT -O1 test/Transforms/InstCombine/call-guard.ll -S -o -

# With debug info
$ $OPT -O1 test/Transforms/InstCombine/call-guard.ll -o - -debugify-each
-debugify-quiet | $OPT -strip -S

Comparing: -O1 test/Transforms/InstCombine/call-guard.ll
  Baseline: /var/folders/j8/t4w0bp8j6x1g6fpghkcb4sjm0000gp/T/tmp.RGoONn6d
  With DI : /var/folders/j8/t4w0bp8j6x1g6fpghkcb4sjm0000gp/T/tmp.9KJlc8DB
20a21
>   call void (i1, ...) @llvm.experimental.guard(i1 %4, i32 123) [ "deopt"() ]
23,24c24
<   %7 = and i1 %6, %4
<   call void (i1, ...) @llvm.experimental.guard(i1 %7, i32 123) [ "deopt"() ]
---
>   call void (i1, ...) @llvm.experimental.guard(i1 %6, i32 789) [ "deopt"() ]
38,39c38,40
<   %3 = load i32, i32* %1, align 4
<   %4 = and i32 %3, %0
---
>   %3 = icmp slt i32 %0, 0
>   call void (i1, ...) @llvm.experimental.guard(i1 %3, i32 123) [ "deopt"() ]
>   %4 = load i32, i32* %1, align 4
41c42
<   call void (i1, ...) @llvm.experimental.guard(i1 %5, i32 123) [ "deopt"() ]
---
>   call void (i1, ...) @llvm.experimental.guard(i1 %5, i32 456) [ "deopt"() ]
:: Found a test case ^

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