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matchpat
2008 May 08
1
[LLVMdev] PPC Isel complex patterns
Hi all,
I have problem with specifying complex patterns in PPC Isel backend.
I would like to fetch few instructions into one like that:
def MatchPAT1 : Pat<(or
(or
(shl GPRC:$rA, (i32 imm:$imm24)),
(and (shl GPRC:$rA, (i32 imm:$imm8)), 0xFF0000)
),
(or
(srl GPRC:$rA, (i32 imm:$imm24)),
(and (shl GPRC:$rA, (i32 imm:$imm8)),0xFF00)
)), (myinstr GPRC:$rA)>;
That pattern corresponds to i32 bswap intrinsic.
The thing is th...