llvm-6502/lib/Target/Sparc
Chandler Carruth ac03e736c7 Rewrite the CMake build to use explicit dependencies between libraries,
specified in the same file that the library itself is created. This is
more idiomatic for CMake builds, and also allows us to correctly specify
dependencies that are missed due to bugs in the GenLibDeps perl script,
or change from compiler to compiler. On Linux, this returns CMake to
a place where it can relably rebuild several targets of LLVM.

I have tried not to change the dependencies from the ones in the current
auto-generated file. The only places I've really diverged are in places
where I was seeing link failures, and added a dependency. The goal of
this patch is not to start changing the dependencies, merely to move
them into the correct location, and an explicit form that we can control
and change when necessary.

This also removes a serialization point in the build because we don't
have to scan all the libraries before we begin building various tools.
We no longer have a step of the build that regenerates a file inside the
source tree. A few other associated cleanups fall out of this.

This isn't really finished yet though. After talking to dgregor he urged
switching to a single CMake macro to construct libraries with both
sources and dependencies in the arguments. Migrating from the two macros
to that style will be a follow-up patch.

Also, llvm-config is still generated with GenLibDeps.pl, which means it
still has slightly buggy dependencies. The internal CMake
'llvm-config-like' macro uses the correct explicitly specified
dependencies however. A future patch will switch llvm-config generation
(when using CMake) to be based on these deps as well.

This may well break Windows. I'm getting a machine set up now to dig
into any failures there. If anyone can chime in with problems they see
or ideas of how to solve them for Windows, much appreciated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136433 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-29 00:14:25 +00:00
..
MCTargetDesc Rewrite the CMake build to use explicit dependencies between libraries, 2011-07-29 00:14:25 +00:00
TargetInfo Rewrite the CMake build to use explicit dependencies between libraries, 2011-07-29 00:14:25 +00:00
CMakeLists.txt Rewrite the CMake build to use explicit dependencies between libraries, 2011-07-29 00:14:25 +00:00
DelaySlotFiller.cpp - Rename TargetInstrDesc, TargetOperandInfo to MCInstrDesc and MCOperandInfo and 2011-06-28 19:10:37 +00:00
FPMover.cpp
Makefile Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
README.txt
Sparc.h Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
Sparc.td
SparcAsmPrinter.cpp
SparcCallingConv.td
SparcFrameLowering.cpp
SparcFrameLowering.h
SparcInstrFormats.td
SparcInstrInfo.cpp Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
SparcInstrInfo.h Hide the call to InitMCInstrInfo into tblgen generated ctor. 2011-07-01 17:57:27 +00:00
SparcInstrInfo.td
SparcISelDAGToDAG.cpp
SparcISelLowering.cpp Code generation for 'fence' instruction. 2011-07-27 22:21:52 +00:00
SparcISelLowering.h Remove getRegClassForInlineAsmConstraint from sparc. 2011-06-29 18:53:10 +00:00
SparcMachineFunctionInfo.h
SparcRegisterInfo.cpp Move getInitialFrameState from TargetFrameInfo to MCAsmInfo (suggestions for 2011-07-18 22:29:13 +00:00
SparcRegisterInfo.h Sink getDwarfRegNum, getLLVMRegNum, getSEHRegNum from TargetRegisterInfo down 2011-07-18 20:57:22 +00:00
SparcRegisterInfo.td Use set operations instead of plain lists to enumerate register classes. 2011-06-15 23:28:14 +00:00
SparcSelectionDAGInfo.cpp
SparcSelectionDAGInfo.h
SparcSubtarget.cpp Next round of MC refactoring. This patch factor MC table instantiations, MC 2011-07-14 20:59:42 +00:00
SparcSubtarget.h Compute feature bits at time of MCSubtargetInfo initialization. 2011-07-07 07:07:08 +00:00
SparcTargetMachine.cpp - Move CodeModel from a TargetMachine global option to MCCodeGenInfo. 2011-07-20 07:51:56 +00:00
SparcTargetMachine.h - Move CodeModel from a TargetMachine global option to MCCodeGenInfo. 2011-07-20 07:51:56 +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