1 ; LFTR should eliminate the need for the computation of i*i completely. It 2 ; is only used to compute the exit value. 3 ; RUN: opt < %s -indvars -dce -S | not grep mul 4 5 @A = external global i32 ; <i32*> [#uses=1] 6 7 define i32 @quadratic_setlt() { 8 entry: 9 br label %loop 10 11 loop: ; preds = %loop, %entry 12 %i = phi i32 [ 7, %entry ], [ %i.next, %loop ] ; <i32> [#uses=5] 13 %i.next = add i32 %i, 1 ; <i32> [#uses=1] 14 store i32 %i, i32* @A 15 %i2 = mul i32 %i, %i ; <i32> [#uses=1] 16 %c = icmp slt i32 %i2, 1000 ; <i1> [#uses=1] 17 br i1 %c, label %loop, label %loopexit 18 19 loopexit: ; preds = %loop 20 ret i32 %i 21 } 22 23
