[all-commits] [llvm/llvm-project] c7633d: [Attributor]: Ensure cycle info is not null when h...

[Vidush Singhal via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c7633ddb28a22a9b9b8d6ee74e911c59ef7d6287
      https://github.com/llvm/llvm-project/commit/c7633ddb28a22a9b9b8d6ee74e911c59ef7d6287
  Author: Vidush Singhal <54336227+vidsinghal at users.noreply.github.com>
  Date:   2024-07-01 (Mon, 01 Jul 2024)

  Changed paths:
    M llvm/lib/Transforms/IPO/AttributorAttributes.cpp
    A llvm/test/Transforms/Attributor/phi_bug_pointer_info.ll

  Log Message:
  -----------
  [Attributor]: Ensure cycle info is not null when handling PHI in AAPointerInfo (#97321)

Ensure cycle info object is not null for simple PHI case

for the test:
`llvm/test/Transforms/Attributor/phi_bug_pointer_info.ll`

Debug info Before the change: 

```
Accesses by bin after update:
[8-12] : 1
     - 9 -   store i32 %0, ptr %field2, align 4
       - c:   %0 = load i32, ptr %val, align 4
[32-36] : 1
     - 9 -   store i32 %1, ptr %field8, align 4
       - c:   %1 = load i32, ptr %val2, align 4
[2147483647-4294967294] : 1
     - 6 -   %ret = load i32, ptr %x, align 4
       - c: <unknown>
```

Debug info After the change: 

```
Accesses by bin after update:
[8-12] : 2
     - 9 -   store i32 %0, ptr %field2, align 4
       - c:   %0 = load i32, ptr %val, align 4
     - 6 -   %ret = load i32, ptr %x, align 4
       - c: <unknown>
[32-36] : 2
     - 9 -   store i32 %1, ptr %field8, align 4
       - c:   %1 = load i32, ptr %val2, align 4
     - 6 -   %ret = load i32, ptr %x, align 4
       - c: <unknown>
```

Co-authored-by: Vidush Singhal <singhal2 at ruby964.llnl.gov>



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