llvm/lib/Target/Sparc
Rafael Espindola fdba645465 Convert a few assert failures into proper errors.
Fixes PR25944.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257697 91177308-0d34-0410-b5e6-96231b3b80d8
2016-01-13 22:56:57 +00:00
..
AsmParser
Disassembler
InstPrinter Remove extra forward declarations and scrub includes for all in tree InstPrinters. NFC 2015-12-25 22:10:01 +00:00
MCTargetDesc Convert a few assert failures into proper errors. 2016-01-13 22:56:57 +00:00
TargetInfo
CMakeLists.txt
DelaySlotFiller.cpp
LLVMBuild.txt
Makefile
README.txt
Sparc.h
Sparc.td
SparcAsmPrinter.cpp
SparcCallingConv.td
SparcFrameLowering.cpp
SparcFrameLowering.h
SparcInstr64Bit.td
SparcInstrAliases.td
SparcInstrFormats.td
SparcInstrInfo.cpp [SPARC] Revamp AnalyzeBranch and add ReverseBranchCondition. 2016-01-13 04:44:14 +00:00
SparcInstrInfo.h [SPARC] Revamp AnalyzeBranch and add ReverseBranchCondition. 2016-01-13 04:44:14 +00:00
SparcInstrInfo.td Start replacing vector_extract/vector_insert with extractelt/insertelt 2015-12-11 19:20:16 +00:00
SparcInstrVIS.td
SparcISelDAGToDAG.cpp
SparcISelLowering.cpp [Sparc] Tweak r255668: Use llvm_unreachable. 2015-12-15 23:07:16 +00:00
SparcISelLowering.h
SparcMachineFunctionInfo.cpp
SparcMachineFunctionInfo.h
SparcMCInstLower.cpp
SparcRegisterInfo.cpp
SparcRegisterInfo.h
SparcRegisterInfo.td
SparcSubtarget.cpp
SparcSubtarget.h
SparcTargetMachine.cpp
SparcTargetMachine.h
SparcTargetObjectFile.cpp
SparcTargetObjectFile.h
SparcTargetStreamer.h

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

* Use %g0 directly to materialize 0. No instruction is required.