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1911fd4f85
llvm-6502/lib/Target/Alpha
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Chris Lattner 1911fd4f85 Completely rearchitect the interface between targets and the pass manager. 
This pass:

1. Splits TargetMachine into TargetMachine (generic targets, can be implemented
any way, like the CBE) and LLVMTargetMachine (subclass of TM that is used by
things using libcodegen and other support).
2. Instead of having each target fully populate the passmgr for file or JIT
   output, move all this to common code, and give targets hooks they can
   implement.
3. Commonalize the target population stuff between file emission and JIT
   emission.
4. All (native code) codegen stuff now happens in a FunctionPassManager, which
   paves the way for "fast -O0" stuff in the CFE later, and now LLC could
   lazily stream .bc files from disk to use less memory.
5. There are now many fewer #includes and the targets don't depend on the
   scalar xforms or libanalysis anymore (but codegen does).
6. Changing common code generator pass ordering stuff no longer requires
   touching all targets.
7. The JIT now has the option of "-fast" codegen or normal optimized codegen,
   which is now orthogonal to the fact that JIT'ing is being done.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30081 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-04 04:14:57 +00:00
..
.cvsignore ignore generated files 2005-09-07 23:47:44 +00:00
Alpha.h - Refactor the code that resolve basic block references to a TargetJITInfo 2006-07-25 20:40:54 +00:00
Alpha.td getCalleeSaveRegs and getCalleeSaveRegClasses are no long TableGen'd. 2006-05-18 00:12:58 +00:00
AlphaAsmPrinter.cpp 0 offsets for memory operands 2006-07-03 17:57:34 +00:00
AlphaCodeEmitter.cpp Resolve BB references with relocation. 2006-07-27 18:21:10 +00:00
AlphaInstrFormats.td Let the alpha breakage begin. First Formals and RET. next Calls 2006-06-12 18:09:24 +00:00
AlphaInstrInfo.cpp these are copies too 2006-03-09 18:18:51 +00:00
AlphaInstrInfo.h isStoreToStackSlot 2006-02-03 03:07:37 +00:00
AlphaInstrInfo.td CALLSEQ_* produces chain even if that's not needed. 2006-08-11 09:03:33 +00:00
AlphaISelDAGToDAG.cpp Do not use getTargetNode() and SelectNodeTo() which takes more than 3 2006-08-27 08:14:06 +00:00
AlphaISelLowering.cpp Eliminate use of getNode that takes a vector. 2006-08-11 17:38:39 +00:00
AlphaISelLowering.h inline asm, at least for floats 2006-06-21 13:37:27 +00:00
AlphaJITInfo.cpp Resolve BB references with relocation. 2006-07-27 18:21:10 +00:00
AlphaJITInfo.h Completely rearchitect the interface between targets and the pass manager. 2006-09-04 04:14:57 +00:00
AlphaRegisterInfo.cpp Constify some methods. Patch provided by Anton Vayvod, thanks! 2006-08-17 22:00:08 +00:00
AlphaRegisterInfo.h getCalleeSaveRegs and getCalleeSaveRegClasses are no long TableGen'd. 2006-05-18 00:12:58 +00:00
AlphaRegisterInfo.td Constify some methods. Patch provided by Anton Vayvod, thanks! 2006-08-17 22:00:08 +00:00
AlphaRelocations.h Patches to make the LLVM sources more -pedantic clean. Patch provided 2006-05-24 17:04:05 +00:00
AlphaSchedule.td Alpha Scheduling classes 2006-03-09 17:16:45 +00:00
AlphaSubtarget.cpp Give full control of subtarget features over to table generated code. 2005-10-26 17:30:34 +00:00
AlphaSubtarget.h Alpha Scheduling classes 2006-03-09 17:16:45 +00:00
AlphaTargetMachine.cpp Completely rearchitect the interface between targets and the pass manager. 2006-09-04 04:14:57 +00:00
AlphaTargetMachine.h Completely rearchitect the interface between targets and the pass manager. 2006-09-04 04:14:57 +00:00
Makefile Autogen subtarget information from .td files. 2005-10-23 22:15:34 +00:00
README.txt ignore ordered/unordered for now 2006-06-04 00:25:51 +00:00

README.txt 

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Fix Ordered/Unordered FP stuff


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
improve bytezap opertunities
ulong %foo(ulong %y) {
entry:
        %tmp = and ulong %y,  65535
        %tmp2 = shr ulong %tmp,  ubyte 3
        ret ulong %tmp2
}


compiles to a 3 instruction sequence without instcombine
        zapnot $16,3,$0
        srl $0,3,$0
        ret $31,($26),1
 
After instcombine you get
ulong %foo(ulong %y) {
entry:
        %tmp = shr ulong %y, ubyte 3            ; <ulong> [#uses=1]
        %tmp2 = and ulong %tmp, 8191            ; <ulong> [#uses=1]
        ret ulong %tmp2
}

which compiles to
        lda $0,8191($31)
        srl $16,3,$1
        and $1,$0,$0
        ret $31,($26),1