[llvm-commits] [llvm] r112393 - in /llvm/trunk/lib/Target/ARM: ARMISelLowering.cpp ARMISelLowering.h ARMInstrThumb2.td

[Jim Grosbach]

Hi Bill,

I'm not sure I follow why this is needed. I'm probably just missing some context. Mind dropping by to enlighten me?

Thanks,
-Jim

On Aug 28, 2010, at 8:02 PM, Bill Wendling wrote:

> Author: void
> Date: Sat Aug 28 22:02:11 2010
> New Revision: 112393
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=112393&view=rev
> Log:
> Create an ARMISD::AND node. This node is exactly like the "ARM::AND" node, but
> it sets the CPSR register.
> 
> Modified:
>    llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
>    llvm/trunk/lib/Target/ARM/ARMISelLowering.h
>    llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
> 
> Modified: llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp?rev=112393&r1=112392&r2=112393&view=diff
> ==============================================================================
> --- llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp (original)
> +++ llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp Sat Aug 28 22:02:11 2010
> @@ -609,6 +609,7 @@
>   case ARMISD::BR2_JT:        return "ARMISD::BR2_JT";
>   case ARMISD::RET_FLAG:      return "ARMISD::RET_FLAG";
>   case ARMISD::PIC_ADD:       return "ARMISD::PIC_ADD";
> +  case ARMISD::AND:           return "ARMISD::AND";
>   case ARMISD::CMP:           return "ARMISD::CMP";
>   case ARMISD::CMPZ:          return "ARMISD::CMPZ";
>   case ARMISD::CMPFP:         return "ARMISD::CMPFP";
> 
> Modified: llvm/trunk/lib/Target/ARM/ARMISelLowering.h
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelLowering.h?rev=112393&r1=112392&r2=112393&view=diff
> ==============================================================================
> --- llvm/trunk/lib/Target/ARM/ARMISelLowering.h (original)
> +++ llvm/trunk/lib/Target/ARM/ARMISelLowering.h Sat Aug 28 22:02:11 2010
> @@ -47,6 +47,8 @@
> 
>       PIC_ADD,      // Add with a PC operand and a PIC label.
> 
> +      AND,          // ARM "and" instruction that sets the 's' flag in CPSR.
> +
>       CMP,          // ARM compare instructions.
>       CMPZ,         // ARM compare that sets only Z flag.
>       CMPFP,        // ARM VFP compare instruction, sets FPSCR.
> 
> Modified: llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td?rev=112393&r1=112392&r2=112393&view=diff
> ==============================================================================
> --- llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td (original)
> +++ llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td Sat Aug 28 22:02:11 2010
> @@ -1631,6 +1631,10 @@
> defm t2BIC  : T2I_bin_w_irs<0b0001, "bic",
>                             BinOpFrag<(and node:$LHS, (not node:$RHS))>>;
> 
> +let Defs = [CPSR] in
> +defm t2ANDflag : T2I_bin_w_irs<0b0000, "and",
> +                               BinOpFrag<(ARMand node:$LHS, node:$RHS)>, 1>;
> +
> let Constraints = "$src = $dst" in
> def t2BFC : T2I<(outs rGPR:$dst), (ins rGPR:$src, bf_inv_mask_imm:$imm),
>                 IIC_iUNAsi, "bfc", "\t$dst, $imm",
> 
> 
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