• Peter Trommler's avatar
    PPC NCG: Implement minimal stack frame header. · 010b07aa
    Peter Trommler authored
    According to the ABI specifications a minimal stack frame consists
    of a header and a minimum size parameter save area. We reserve the
    minimal size for each ABI.
    
    On PowerPC 64-bil Linux and AIX the parameter save area can accomodate
    up to eight parameters. So calls with eight parameters and fewer
    can be done without allocating a new stack frame and deallocating
    that stack frame after the call. On AIX one additional spill slot
    is available on the stack.
    
    Code size for all nofib benchmarks is 0.3 % smaller on powerpc64.
    
    Test Plan: validate on AIX
    
    Reviewers: hvr!, erikd, austin, simonmar, bgamari
    
    Reviewed By: bgamari
    
    Subscribers: thomie
    
    Differential Revision: https://phabricator.haskell.org/D2445
    010b07aa
CodeGen.hs 77.9 KB