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    • Ben.Lippmeier@anu.edu.au's avatar
      Split Reg into vreg/hreg and add register pairs · f9288086
      Ben.Lippmeier@anu.edu.au authored
       * The old Reg type is now split into VirtualReg and RealReg.
       * For the graph coloring allocator, the type of the register graph
         is now (Graph VirtualReg RegClass RealReg), which shows that it colors
         in nodes representing virtual regs with colors representing real regs.
         (as was intended)  
       * RealReg contains two contructors, RealRegSingle and RealRegPair,
         where RealRegPair is used to represent a SPARC double reg 
         constructed from two single precision FP regs. 
       * On SPARC we can now allocate double regs into an arbitrary register
         pair, instead of reserving some reg ranges to only hold float/double values. 
      f9288086
  10. 15 Feb, 2009 1 commit
    • Ben.Lippmeier@anu.edu.au's avatar
      NCG: Split up the native code generator into arch specific modules · b04a210e
      Ben.Lippmeier@anu.edu.au authored
        - nativeGen/Instruction defines a type class for a generic
          instruction set. Each of the instruction sets we have, 
          X86, PPC and SPARC are instances of it.
        
        - The register alloctors use this type class when they need
          info about a certain register or instruction, such as
          regUsage, mkSpillInstr, mkJumpInstr, patchRegs..
        
        - nativeGen/Platform defines some data types enumerating
          the architectures and operating systems supported by the 
          native code generator.
        
        - DynFlags now keeps track of the current build platform, and 
          the PositionIndependentCode module uses this to decide what
          to do instead of relying of #ifdefs.
        
        - It's not totally retargetable yet. Some info info about the
          build target is still hardwired, but I've tried to contain
          most of it to a single module, TargetRegs.
        
        - Moved the SPILL and RELOAD instructions into LiveInstr.
        
        - Reg and RegClass now have their own modules, and are shared
          across all architectures.
      b04a210e
  11. 04 Feb, 2009 1 commit
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