[all-commits] [llvm/llvm-project] 14d939: Revert D123198 "[BuildLibCalls] Introduce getOrIns...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 14d93907213302dcd57b6dd2baeb9adccc59ab61
      https://github.com/llvm/llvm-project/commit/14d93907213302dcd57b6dd2baeb9adccc59ab61
  Author: Fangrui Song <i at maskray.me>
  Date:   2022-04-19 (Tue, 19 Apr 2022)

  Changed paths:
    M llvm/include/llvm/IR/Module.h
    M llvm/include/llvm/Transforms/Utils/BuildLibCalls.h
    M llvm/lib/Transforms/IPO/InferFunctionAttrs.cpp
    M llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp
    M llvm/lib/Transforms/Utils/BuildLibCalls.cpp
    M llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
    M llvm/test/Transforms/InferFunctionAttrs/annotate.ll
    R llvm/test/Transforms/InstCombine/SystemZ/libcall-arg-exts.ll
    M llvm/test/Transforms/InstCombine/double-float-shrink-1.ll

  Log Message:
  -----------
  Revert D123198 "[BuildLibCalls] Introduce getOrInsertLibFunc() for use when building libcalls."

test/Transforms/InstCombine/pr39177.ll failed in a -DLLVM_USE_SANITIZER=Undefined build.
```
lib/Transforms/Utils/BuildLibCalls.cpp:1217:17: runtime error: reference binding to null pointer of type 'llvm::Function'
```
`Function &F = *M->getFunction(Name);`

This reverts commit 0f8c626723d2bbd547e78dcab5ab260dfbc437e1.