search for: rahints

Displaying 2 results from an estimated 2 matches for "rahints".

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2012 Mar 28
2
[LLVMdev] Remove subreg copies
...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 removes them automatically but it didn't work on all the copies. Is there another method to get rid of these copies whenever possible ? Ivan
2012 Mar 28
0
[LLVMdev] Remove subreg copies
...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 removes them automatically but it didn't work on all the copies. Is > there another method to get rid of these copies whenever possible ? I assume you are usin...