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[PowerPC] add test for popcnt with any_extend; NFC 

A zext-specific variation of this case is proposed in D69127.
This commit is contained in:
Sanjay Patel 2019-10-25 12:42:06 -04:00
parent 8e567b0730
commit b74d7e5ccc
1 changed files with 39 additions and 1 deletions
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40
llvm/test/CodeGen/PowerPC/popcnt-zext.ll
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@ -297,8 +297,46 @@ define i64 @popz_i32_i64(i32 %x) {
ret i64 %z
}
define i64 @popa_i16_i64(i16 %x) {
; FAST-LABEL: popa_i16_i64:
; FAST: # %bb.0:
; FAST-NEXT: rlwinm 3, 3, 0, 16, 31
; FAST-NEXT: popcntw 3, 3
; FAST-NEXT: andi. 3, 3, 16
; FAST-NEXT: blr
;
; SLOW-LABEL: popa_i16_i64:
; SLOW: # %bb.0:
; SLOW-NEXT: clrlwi 5, 3, 16
; SLOW-NEXT: rlwinm 3, 3, 31, 0, 31
; SLOW-NEXT: andi. 3, 3, 21845
; SLOW-NEXT: lis 4, 13107
; SLOW-NEXT: subf 3, 3, 5
; SLOW-NEXT: ori 4, 4, 13107
; SLOW-NEXT: rotlwi 5, 3, 30
; SLOW-NEXT: and 3, 3, 4
; SLOW-NEXT: andis. 4, 5, 13107
; SLOW-NEXT: andi. 5, 5, 13107
; SLOW-NEXT: or 4, 5, 4
; SLOW-NEXT: add 3, 3, 4
; SLOW-NEXT: lis 5, 3855
; SLOW-NEXT: srwi 4, 3, 4
; SLOW-NEXT: add 3, 3, 4
; SLOW-NEXT: lis 4, 257
; SLOW-NEXT: ori 5, 5, 3855
; SLOW-NEXT: and 3, 3, 5
; SLOW-NEXT: ori 4, 4, 257
; SLOW-NEXT: mullw 3, 3, 4
; SLOW-NEXT: srwi 3, 3, 24
; SLOW-NEXT: andi. 3, 3, 16
; SLOW-NEXT: blr
%pop = call i16 @llvm.ctpop.i16(i16 %x)
%z = zext i16 %pop to i64 ; SimplifyDemandedBits may turn zext (or sext) into aext
%a = and i64 %z, 16
ret i64 %a
}
declare i8 @llvm.ctpop.i8(i8) nounwind readnone
declare i16 @llvm.ctpop.i16(i16) nounwind readnone
declare i32 @llvm.ctpop.i32(i32) nounwind readnone
declare i64 @llvm.ctpop.i64(i64) nounwind readnone