Displaying 2 results from an estimated 2 matches for "rsub_l".
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rsub_h
2012 Mar 28
2
[LLVMdev] Remove subreg copies
Hi,
I'm facing a problem in my BE while trying to remove certain copies.
Here is a code snippet which I would like to optimize
%vreg1<def> = READF32r; vRRegs:%vreg1
%vreg2<def> = COPY %vreg1:rsub_h; iRSubRegs:%vreg2 vRRegs:%vreg1
%vreg3<def> = COPY %vreg1:rsub_l; iRSubRegs:%vreg3 vRRegs:%vreg1
This code produces subreg-to-subreg copies but I would like to have
direct uses of vreg1's subregisters instead.
I tried to add RAhints in order to form identity copies (vreg1 and
vreg2/3 should be allocated to the same sub/super register) and let the
RA remo...
2012 Mar 28
0
[LLVMdev] Remove subreg copies
...'m facing a problem in my BE while trying to remove certain copies.
> Here is a code snippet which I would like to optimize
>
> %vreg1<def> = READF32r; vRRegs:%vreg1
> %vreg2<def> = COPY %vreg1:rsub_h; iRSubRegs:%vreg2 vRRegs:%vreg1
> %vreg3<def> = COPY %vreg1:rsub_l; iRSubRegs:%vreg3 vRRegs:%vreg1
>
> This code produces subreg-to-subreg copies but I would like to have
> direct uses of vreg1's subregisters instead.
> I tried to add RAhints in order to form identity copies (vreg1 and
> vreg2/3 should be allocated to the same sub/super regis...