[llvm-branch-commits] [llvm] [llvm][EmbedBitcodePass] Prevent modifying the module with ThinLTO (PR #139999)

[Paul Kirth via llvm-branch-commits]

ilovepi wrote:

The test suite seems just as happy with the FatLTO fix as it does with ThinLTO on the release branch. I see the same three tests failing, and the reported test case passes as well.

For completeness these are the failing tests. This was consistent w/ FatLTO + ThinLTO, and ThinLTO alone on built from releases/20.x with the call to CloneModule().
 
```
 test-suite :: MultiSource/UnitTests/Float/rounding/rounding.test
  test-suite :: SingleSource/Regression/C/gcc-c-torture/execute/GCC-C-execute-pr17377.test
  test-suite :: SingleSource/UnitTests/Float/classify.test
```

https://github.com/llvm/llvm-project/pull/139999