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[AArch64]Fix PR21675, a bug about lowering llvm.ctpop.i32. We should noot use "DAG.getUNDEF(MVT::v8i8)" to get all zero vector.

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Patch by Wei-cheng Wang.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227550 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hao Liu
2015-01-30 02:13:53 +00:00
parent dd5e9f624b
commit 7d3a44a692
2 changed files with 23 additions and 11 deletions
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test/CodeGen/AArch64/arm64-popcnt.ll
+19 -1
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@@ -4,7 +4,8 @@
define i32 @cnt32_advsimd(i32 %x) nounwind readnone {
%cnt = tail call i32 @llvm.ctpop.i32(i32 %x)
ret i32 %cnt
; CHECK: fmov s0, w0
; CHECK: ubfx x{{[0-9]+}}
; CHECK: fmov d0, x{{[0-9]+}}
; CHECK: cnt.8b v0, v0
; CHECK: uaddlv.8b h0, v0
; CHECK: fmov w0, s0
@@ -15,7 +16,24 @@ define i32 @cnt32_advsimd(i32 %x) nounwind readnone {
; CHECK-NONEON: and w{{[0-9]+}}, w{{[0-9]+}}, #0x33333333
; CHECK-NONEON: and w{{[0-9]+}}, w{{[0-9]+}}, #0xf0f0f0f
; CHECK-NONEON: mul
}
define i32 @cnt32_advsimd_2(<2 x i32> %x) {
%1 = extractelement <2 x i32> %x, i64 0
%2 = tail call i32 @llvm.ctpop.i32(i32 %1)
ret i32 %2
; CHECK: fmov w0, s0
; CHECK: fmov d0, x0
; CHECK: cnt.8b v0, v0
; CHECK: uaddlv.8b h0, v0
; CHECK: fmov w0, s0
; CHECK: ret
; CHECK-NONEON-LABEL: cnt32_advsimd_2
; CHECK-NONEON-NOT: 8b
; CHECK-NONEON: and w{{[0-9]+}}, w{{[0-9]+}}, #0x55555555
; CHECK-NONEON: and w{{[0-9]+}}, w{{[0-9]+}}, #0x33333333
; CHECK-NONEON: and w{{[0-9]+}}, w{{[0-9]+}}, #0xf0f0f0f
; CHECK-NONEON: mul
}
define i64 @cnt64_advsimd(i64 %x) nounwind readnone {