Displaying 3 results from an estimated 3 matches for "t2bicrr".
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t2bicrs
2009 Jun 26
1
[LLVMdev] bitwise AND selector node not commutative?
...; // Emits: (t2BICrs:i32 GPR:i32:$lhs, t2_so_reg:i32:$rhs)
> // Pattern complexity = 19 cost = 1 size = 0
> {
> ...
> }
>
> The second one is the commuted version. Looks like the issue is in
> SelectThumb2ShifterOperandReg.
Ugh. It should try to match t2BICrr. But someone tblgen is not
generating the commuted version. Very strange. I'm take a look.
Evan
>
> Evan
>
>
>>
>> David
>>
>> <RM_20_BIC.ll>
>> <RM_112_ORN.ll>
>>
>> _______________________________________________
>> L...
2009 Jun 26
0
[LLVMdev] bitwise AND selector node not commutative?
On Jun 25, 2009, at 4:38 PM, David Goodwin wrote:
> Using the Thumb-2 target we see that ORN ( a | ^b) and BIC (a & ^b)
> have similar patterns, as we would expect:
>
> defm t2BIC : T2I_bin_irs<"bic", BinOpFrag<(and node:$LHS, (not node:
> $RHS))>>;
> defm t2ORN : T2I_bin_irs<"orn", BinOpFrag<(or node:$LHS, (not node:
>
2009 Jun 25
2
[LLVMdev] bitwise AND selector node not commutative?
Using the Thumb-2 target we see that ORN ( a | ^b) and BIC (a & ^b)
have similar patterns, as we would expect:
defm t2BIC : T2I_bin_irs<"bic", BinOpFrag<(and node:$LHS, (not node:
$RHS))>>;
defm t2ORN : T2I_bin_irs<"orn", BinOpFrag<(or node:$LHS, (not node:
$RHS))>>;
Compiling the following three works as expected:
%tmp1 = xor i32