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| author | luxufan <luxufan@iscas.ac.cn> | 2023-03-03 16:34:17 +0800 |
|---|---|---|
| committer | luxufan <luxufan@iscas.ac.cn> | 2023-03-21 15:24:17 +0800 |
| commit | 6beb371e4c469801e04711b81d27cde6da11b032 (patch) | |
| tree | 6f5236f983c5602d9196ef7aa37cb10f94c91532 /llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp | |
| parent | 9c93e728bfb8079c1de51e5481168c4083038c2a (diff) | |
| download | llvm-6beb371e4c469801e04711b81d27cde6da11b032.zip llvm-6beb371e4c469801e04711b81d27cde6da11b032.tar.gz llvm-6beb371e4c469801e04711b81d27cde6da11b032.tar.bz2 | |
[InstCombine] Combine binary operator of two phi node
Combine binary operator of two phi node if there is at least one
specific constant value in phi0 and phi1's incoming values for each
same incoming block and this specific constant value can be used
to do optimization for specific binary operator.
For example:
```
%phi0 = phi i32 [0, %bb0], [%i, %bb1]
%phi1 = phi i32 [%j, %bb0], [0, %bb1]
%add = add i32 %phi0, %phi1
==>
%add = phi i32 [%j, %bb0], [%i, %bb1]
```
Fixes: https://github.com/llvm/llvm-project/issues/61137
Differential Revision: https://reviews.llvm.org/D145223
Diffstat (limited to 'llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp')
0 files changed, 0 insertions, 0 deletions