Displaying 2 results from an estimated 2 matches for "registercopies".
2009 Dec 19
0
[LLVMdev] Questions of instruction target description of MSP430
Hi,
1. This instruction is not selected automatically by the instruction selector. The instruction combine / select stages insert registercopies, and they are expanded later on by the copyRegToReg() function provided by the MSP430InstrInfo to this MOV16rr.
2. ReMaterializable means there is no need to find a way to preserve the value in a register : the instruction can be just be reissued whenever the value is needed. This remove some pre...
2009 Dec 18
2
[LLVMdev] Questions of instruction target description of MSP430
Hi everyone,
I am puzzled by several instruction defines in MSP430.
1
def MOV16rr : Pseudo<(outs GR16:$dst), (ins GR16:$src),
"mov.w\t{$src, $dst}",
[ ]>;
Because it's an empty dag pattern[ ], by what does instuction selector
select intruction 'MOV16rr'?
2
let canFoldAsLoad = 1, isReMaterializable = 1, mayHaveSideEffects =