llvm-6502/lib/Target/Sparc
Devang Patel 68e6beeccc Revert r124611 - "Keep track of incoming argument's location while emitting LiveIns."
In other words, do not keep track of argument's location.  The debugger (gdb) is not prepared to see line table entries for arguments. For the debugger, "second" line table entry marks beginning of function body.
This requires some coordination with debugger to get this working. 
 - The debugger needs to be aware of prolog_end attribute attached with line table entries.
 - The compiler needs to accurately mark prolog_end in line table entries (at -O0 and at -O1+)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126155 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-21 23:21:26 +00:00
..
TargetInfo
CMakeLists.txt Use explicit add_subdirectory's for LLVM target sublibraries instead 2011-02-20 02:55:27 +00:00
DelaySlotFiller.cpp Generate correct Sparc32 ABI compliant code for functions that return a struct. 2011-02-21 03:42:44 +00:00
FPMover.cpp Reapply r110396, with fixes to appease the Linux buildbot gods. 2010-08-06 18:33:48 +00:00
Makefile move all the target's asmprinters into the main target. The piece 2010-11-14 18:43:56 +00:00
README.txt
Sparc.h
Sparc.td fix emacs language spec's, patch by Edmund Grimley-Evans! 2010-08-17 16:20:04 +00:00
SparcAsmPrinter.cpp Remove SPARC backend getpcx instruction's Uses. Also, insert an assert to 2011-01-12 03:52:59 +00:00
SparcCallingConv.td Pass sret arguments through the stack instead of through registers in Sparc backend. It makes the code generated more compliant with the sparc32 ABI. 2011-01-22 13:05:16 +00:00
SparcFrameLowering.cpp Teach frame lowering to ignore debug values after the terminators. 2011-01-13 21:28:52 +00:00
SparcFrameLowering.h Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00
SparcInstrFormats.td
SparcInstrInfo.cpp Implement AnalyzeBranch in Sparc Backend. 2011-01-16 03:15:11 +00:00
SparcInstrInfo.h Implement AnalyzeBranch in Sparc Backend. 2011-01-16 03:15:11 +00:00
SparcInstrInfo.td Generate correct Sparc32 ABI compliant code for functions that return a struct. 2011-02-21 03:42:44 +00:00
SparcISelDAGToDAG.cpp rename MVT::Flag to MVT::Glue. "Flag" is a terrible name for 2010-12-21 02:38:05 +00:00
SparcISelLowering.cpp Revert r124611 - "Keep track of incoming argument's location while emitting LiveIns." 2011-02-21 23:21:26 +00:00
SparcISelLowering.h Generate correct Sparc32 ABI compliant code for functions that return a struct. 2011-02-21 03:42:44 +00:00
SparcMachineFunctionInfo.h Pass sret arguments through the stack instead of through registers in Sparc backend. It makes the code generated more compliant with the sparc32 ABI. 2011-01-22 13:05:16 +00:00
SparcMCAsmInfo.cpp Don't pass StringRef by reference. 2010-07-14 22:38:02 +00:00
SparcMCAsmInfo.h Don't pass StringRef by reference. 2010-07-14 22:38:02 +00:00
SparcRegisterInfo.cpp Move hasFP() and few related hooks to TargetFrameInfo. 2010-11-18 21:19:35 +00:00
SparcRegisterInfo.h Move hasFP() and few related hooks to TargetFrameInfo. 2010-11-18 21:19:35 +00:00
SparcRegisterInfo.td Multiple SPARC backend fixes: added Y register; updated select_cc, subx, subxcc defs/uses; 2010-12-28 20:39:17 +00:00
SparcSelectionDAGInfo.cpp
SparcSelectionDAGInfo.h
SparcSubtarget.cpp
SparcSubtarget.h
SparcTargetMachine.cpp Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00
SparcTargetMachine.h Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 2011-01-10 12:39:04 +00:00

To-do
-----

* Keep the address of the constant pool in a register instead of forming its
  address all of the time.
* We can fold small constant offsets into the %hi/%lo references to constant
  pool addresses as well.
* When in V9 mode, register allocate %icc[0-3].
* Add support for isel'ing UMUL_LOHI instead of marking it as Expand.
* Emit the 'Branch on Integer Register with Prediction' instructions.  It's
  not clear how to write a pattern for this though:

float %t1(int %a, int* %p) {
        %C = seteq int %a, 0
        br bool %C, label %T, label %F
T:
        store int 123, int* %p
        br label %F
F:
        ret float undef
}

codegens to this:

t1:
        save -96, %o6, %o6
1)      subcc %i0, 0, %l0
1)      bne .LBBt1_2    ! F
        nop
.LBBt1_1:       ! T
        or %g0, 123, %l0
        st %l0, [%i1]
.LBBt1_2:       ! F
        restore %g0, %g0, %g0
        retl
        nop

1) should be replaced with a brz in V9 mode.

* Same as above, but emit conditional move on register zero (p192) in V9 
  mode.  Testcase:

int %t1(int %a, int %b) {
        %C = seteq int %a, 0
        %D = select bool %C, int %a, int %b
        ret int %D
}

* Emit MULX/[SU]DIVX instructions in V9 mode instead of fiddling 
  with the Y register, if they are faster.

* Codegen bswap(load)/store(bswap) -> load/store ASI

* Implement frame pointer elimination, e.g. eliminate save/restore for 
  leaf fns.
* Fill delay slots

* Implement JIT support