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[InstCombine] add test for demanded bits with splat vector constants; NFC

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294625 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjay Patel 2017-02-09 21:33:19 +00:00
parent 3af2f3b521
commit 4dc55bcb30
1 changed files with 13 additions and 0 deletions
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13
test/Transforms/InstCombine/and.ll
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@ -382,6 +382,19 @@ define i32 @test31(i1 %X) {
ret i32 %A
}
; FIXME: Demanded bit analysis allows us to eliminate the add.
define <2 x i32> @and_demanded_bits_splat_vec(<2 x i32> %x) {
; CHECK-LABEL: @and_demanded_bits_splat_vec(
; CHECK-NEXT: [[Y:%.*]] = add <2 x i32> %x, <i32 8, i32 8>
; CHECK-NEXT: [[Z:%.*]] = and <2 x i32> [[Y]], <i32 7, i32 7>
; CHECK-NEXT: ret <2 x i32> [[Z]]
;
%y = add <2 x i32> %x, <i32 8, i32 8>
%z = and <2 x i32> %y, <i32 7, i32 7>
ret <2 x i32> %z
}
define i32 @test32(i32 %In) {
; CHECK-LABEL: @test32(
; CHECK-NEXT: ret i32 0