[llvm-commits] [PATCH] Do not run LoopIdiomRecognizerPass inside memset() and friends.

[Chris Lattner]

On Jul 10, 2011, at 4:48 AM, arrowdodger wrote:

> When compiling http://llvm.org/svn/llvm-project/klee/trunk/runtime/Intrinsic/memset.c with -O2, LoopIdiomRecognizer pass inserts memset intrinsic into function body. It causes recursion during execution in klee. Attached patch fixes this.

Hi arrowdodger,

System code is supposed to build with -fno-builtin.  If clang is using the LLVM passes directly, it can set up a TargetLoweringInfo instance that disables these transformations.

-Chris

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