[LLVMbugs] [Bug 2647] extractps selected too eagerly

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Thu Oct 30 18:25:11 PDT 2008


Dan Gohman <gohman at apple.com> changed:

           What    |Removed                     |Added
             Status|REOPENED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #9 from Dan Gohman <gohman at apple.com>  2008-10-30 20:25:10 ---
With this commit:
codegen avoids selecting extractps for a store of element 0, and uses movss
The provided testcase now compiles to three instructions even with

The extra setup is a known issue.  The code that decides if stack-pointer
is necessary is over-conservative in some cases. See
the entry starting with "LLVM currently generates stack realignment code".


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