[LLVMbugs] [Bug 17742] New: SLP vectorizer does not handle calls

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17742

            Bug ID: 17742
           Summary: SLP vectorizer does not handle calls
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: hfinkel at anl.gov
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 11452
  --> http://llvm.org/bugs/attachment.cgi?id=11452&action=edit
IR file (derived from test/Transforms/SLPVectorizer/X86/simplebb.ll)

The SLP vectorizer currently does not handle calls. Some calls, and their
corresponding intrinsics, can be efficiently lowered (like calling fabs() or
floor(), etc.) into vector code. I've attached a test case that I believe
should vectorize with the SLP vectorizer, but does not because of this lack of
call handling.

The loop vectorizer handles these well. See getIntrinsicIDForCall in
lib/Transforms/Vectorize/LoopVectorize.cpp and its various uses for an example
of how to do this properly.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20131030/ab51fa96/attachment.html>