llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-09-28 22:55:52 +00:00

History

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
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
AlphaInstrInfo.h
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
AlphaSubtarget.cpp
AlphaSubtarget.h
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
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