[all-commits] [llvm/llvm-project] 90668d: [CVP][LVI] Add support for InsertElementInst in LV...

[Rajat Bajpai via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 90668d240417422827d0468aa32b6aaa88105859
      https://github.com/llvm/llvm-project/commit/90668d240417422827d0468aa32b6aaa88105859
  Author: Rajat Bajpai <rbajpai at nvidia.com>
  Date:   2024-07-19 (Fri, 19 Jul 2024)

  Changed paths:
    M llvm/lib/Analysis/LazyValueInfo.cpp
    M llvm/test/Transforms/CorrelatedValuePropagation/vectors.ll

  Log Message:
  -----------
  [CVP][LVI] Add support for InsertElementInst in LVI (#99368)

Currently, the LVI analysis pass doesn't support InsertElementInst
vector instruction. Due to this, some optimization opportunities are
missed. For example, in the below example, ICMP instruction can be
folded but it doesn't.

```
...
%ie1 = insertelement <2 x i32> poison, i32 10, i64 0
%ie2 = insertelement <2 x i32> %ie1, i32 20, i64 1
%icmp = icmp <2 x i1> %ie2, <i32 40, i32 40>
...
```

This change adds InsertElementInst support in the LVI analysis pass to
fix the motivating example.



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