• Peter Trommler's avatar
    nativeGen PPC: fix > 16 bit offsets in stack handling · b29f20ed
    Peter Trommler authored
    Implement access to spill slots at offsets larger than 16 bits.
    Also allocation and deallocation of spill slots was restricted to
    16 bit offsets. Now 32 bit offsets are supported on all PowerPC
    platforms.
    
    The implementation of 32 bit offsets requires more than one instruction
    but the native code generator wants one instruction. So we implement
    pseudo-instructions that are pretty printed into multiple assembly
    instructions.
    
    With pseudo-instructions for spill slot allocation and deallocation
    we can also implement handling of the back chain pointer according
    to the ELF ABIs.
    
    Test Plan: validate (especially on powerpc (32 bit))
    
    Reviewers: bgamari, austin, erikd
    
    Reviewed By: erikd
    
    Subscribers: thomie
    
    Differential Revision: https://phabricator.haskell.org/D1296
    
    GHC Trac Issues: #7830
    b29f20ed
Instr.hs 25.4 KB