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[InstSimplify] add tests for cttz of shifted-1; NFC

This commit is contained in:
Sanjay Patel 2021-03-08 15:29:26 -05:00
parent 84fa3497c8
commit afa443831b
1 changed files with 25 additions and 0 deletions
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25
llvm/test/Transforms/InstSimplify/call.ll
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@ -1360,4 +1360,29 @@ define i1 @ctpop_bool(i1 %x) {
ret i1 %r
}
declare i32 @llvm.cttz.i32(i32, i1)
declare <3 x i33> @llvm.cttz.v3i33(<3 x i33>, i1)
define i32 @cttz_shl1(i32 %x) {
; CHECK-LABEL: @cttz_shl1(
; CHECK-NEXT: [[S:%.*]] = shl i32 1, [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = call i32 @llvm.cttz.i32(i32 [[S]], i1 true)
; CHECK-NEXT: ret i32 [[R]]
;
%s = shl i32 1, %x
%r = call i32 @llvm.cttz.i32(i32 %s, i1 true)
ret i32 %r
}
define <3 x i33> @cttz_shl1_vec(<3 x i33> %x) {
; CHECK-LABEL: @cttz_shl1_vec(
; CHECK-NEXT: [[S:%.*]] = shl <3 x i33> <i33 1, i33 1, i33 undef>, [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = call <3 x i33> @llvm.cttz.v3i33(<3 x i33> [[S]], i1 false)
; CHECK-NEXT: ret <3 x i33> [[R]]
;
%s = shl <3 x i33> <i33 1, i33 1, i33 undef>, %x
%r = call <3 x i33> @llvm.cttz.v3i33(<3 x i33> %s, i1 false)
ret <3 x i33> %r
}
attributes #0 = { nobuiltin readnone }