[LLVMbugs] [Bug 17548] New: Poor MMX+SSE codegen

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17548

            Bug ID: 17548
           Summary: Poor MMX+SSE codegen
           Product: clang
           Version: 3.3
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: dsaritz at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Noticed in FFT code in the NT2 library, please consult this MSVC ticket for
information on how to get to the code:
https://connect.microsoft.com/VisualStudio/feedback/details/804579/msvc-serious-sse-codegen-regression

Pay attention to the note in extra_registers.hpp for line 41...


- possibly related to:
http://llvm.org/bugs/show_bug.cgi?id=13292
http://llvm.org/bugs/show_bug.cgi?id=1821
http://llvm.org/bugs/show_bug.cgi?id=17547

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