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# cee313d2 17-Apr-2019 Eric Christopher <[email protected]>

Revert "Temporarily Revert "Add basic loop fusion pass.""

The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552


Revision tags: llvmorg-8.0.0, llvmorg-8.0.0-rc5, llvmorg-8.0.0-rc4, llvmorg-8.0.0-rc3, llvmorg-7.1.0, llvmorg-7.1.0-rc1, llvmorg-8.0.0-rc2, llvmorg-8.0.0-rc1, llvmorg-7.0.1, llvmorg-7.0.1-rc3, llvmorg-7.0.1-rc2, llvmorg-7.0.1-rc1, llvmorg-7.0.0, llvmorg-7.0.0-rc3, llvmorg-7.0.0-rc2, llvmorg-7.0.0-rc1
# d3b8bdef 26-Jun-2018 Michael Zolotukhin <[email protected]>

[JumpThreading] Don't try to rewrite a use if it's already valid.

Summary:
When recording uses we need to rewrite after cloning a loop we need to
check if the use is not dominated by the original de

[JumpThreading] Don't try to rewrite a use if it's already valid.

Summary:
When recording uses we need to rewrite after cloning a loop we need to
check if the use is not dominated by the original def. The initial
assumption was that the cloned basic block will introduce a new path and
thus the original def will only dominate the use if they are in the same
BB, but as the reproducer from PR37745 shows it's not always the case.

This fixes PR37745.

Reviewers: haicheng, Ka-Ka

Subscribers: hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D48111

llvm-svn: 335675

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