llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-11-14 13:07:31 +00:00

History

Chris Lattner e219945348 Eliminate use of getNode that takes a vector. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29614 91177308-0d34-0410-b5e6-96231b3b80d8		2006-08-11 17:38:39 +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
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	Match tablegen changes.	2006-08-11 09:08:15 +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	Resolve BB references with relocation.	2006-07-27 18:21:10 +00:00
AlphaRegisterInfo.cpp	Let the alpha breakage begin. First Formals and RET. next Calls	2006-06-12 18:09:24 +00:00
AlphaRegisterInfo.h
AlphaRegisterInfo.td
AlphaRelocations.h
AlphaSchedule.td
AlphaSubtarget.cpp
AlphaSubtarget.h
AlphaTargetMachine.cpp	- Refactor the code that resolve basic block references to a TargetJITInfo	2006-07-25 20:40:54 +00:00
AlphaTargetMachine.h
Makefile
README.txt

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