SolveQuadraticEquation.ll   [plain text]

; RUN: llvm-as < %s | opt -analyze -scalar-evolution \
; RUN:   -scalar-evolution-max-iterations=0 | grep {backedge-taken count is 100}
; PR1101

@A = weak global [1000 x i32] zeroinitializer, align 32         


define void @test(i32 %N) {
entry:
        "alloca point" = bitcast i32 0 to i32           ; <i32> [#uses=0]
        br label %bb3

bb:             ; preds = %bb3
        %tmp = getelementptr [1000 x i32]* @A, i32 0, i32 %i.0          ; <i32*> [#uses=1]
        store i32 123, i32* %tmp
        %tmp2 = add i32 %i.0, 1         ; <i32> [#uses=1]
        br label %bb3

bb3:            ; preds = %bb, %entry
        %i.0 = phi i32 [ 2, %entry ], [ %tmp2, %bb ]            ; <i32> [#uses=3]
        %SQ = mul i32 %i.0, %i.0
        %tmp4 = mul i32 %i.0, 2
        %tmp5 = sub i32 %SQ, %tmp4
        %tmp3 = icmp sle i32 %tmp5, 9999          ; <i1> [#uses=1]
        br i1 %tmp3, label %bb, label %bb5

bb5:            ; preds = %bb3
        br label %return

return:         ; preds = %bb5
        ret void
}