llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-09-29 13:54:57 +00:00

History

Evan Cheng af9db75943 Add properties to ComplexPattern. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30891 91177308-0d34-0410-b5e6-96231b3b80d8		2006-10-11 21:03:53 +00:00
..
.cvsignore
ARM.h
ARM.td
ARMAsmPrinter.cpp
ARMFrameInfo.h
ARMInstrInfo.cpp
ARMInstrInfo.h
ARMInstrInfo.td	Add properties to ComplexPattern.	2006-10-11 21:03:53 +00:00
ARMISelDAGToDAG.cpp	uint <-> double conversion	2006-10-10 20:38:57 +00:00
ARMMul.cpp
ARMRegisterInfo.cpp
ARMRegisterInfo.h
ARMRegisterInfo.td
ARMTargetAsmInfo.cpp
ARMTargetAsmInfo.h
ARMTargetMachine.cpp	most ARM targets are little endian	2006-10-09 14:12:15 +00:00
ARMTargetMachine.h
Makefile
README.txt	add a note	2006-10-09 14:18:33 +00:00

README.txt

//===---------------------------------------------------------------------===//
// Random ideas for the ARM backend.
//===---------------------------------------------------------------------===//

Consider implementing a select with two conditional moves:

cmp x, y
moveq dst, a
movne dst, b

----------------------------------------------------------


%tmp1 = shl int %b, ubyte %c
%tmp4 = add int %a, %tmp1

compiles to

add r0, r0, r1, lsl r2

but

%tmp1 = shl int %b, ubyte %c
%tmp4 = add int %tmp1, %a

compiles to
mov r1, r1, lsl r2
add r0, r1, r0

----------------------------------------------------------

add an offset to FLDS/FLDD addressing mode

----------------------------------------------------------

the function

void %f() {
entry:
	call void %g( int 1, int 2, int 3, int 4, int 5 )
	ret void
}

declare void %g(int, int, int, int, int)

Only needs 8 bytes of stack space. We currently allocate 16.

----------------------------------------------------------