1 ; RUN: opt < %s -analyze -scalar-evolution \ 2 ; RUN: | grep {max backedge-taken count is 1\$} 3 4 @mode_table = global [4 x i32] zeroinitializer ; <[4 x i32]*> [#uses=1] 5 6 define i8 @f() { 7 entry: 8 tail call i32 @fegetround( ) ; <i32>:0 [#uses=1] 9 br label %bb 10 11 bb: ; preds = %bb4, %entry 12 %mode.0 = phi i8 [ 0, %entry ], [ %indvar.next, %bb4 ] ; <i8> [#uses=4] 13 zext i8 %mode.0 to i32 ; <i32>:1 [#uses=1] 14 getelementptr [4 x i32]* @mode_table, i32 0, i32 %1 ; <i32*>:2 [#uses=1] 15 load i32* %2, align 4 ; <i32>:3 [#uses=1] 16 icmp eq i32 %3, %0 ; <i1>:4 [#uses=1] 17 br i1 %4, label %bb1, label %bb2 18 19 bb1: ; preds = %bb 20 ret i8 %mode.0 21 22 bb2: ; preds = %bb 23 icmp eq i8 %mode.0, 1 ; <i1>:5 [#uses=1] 24 br i1 %5, label %bb5, label %bb4 25 26 bb4: ; preds = %bb2 27 %indvar.next = add i8 %mode.0, 1 ; <i8> [#uses=1] 28 br label %bb 29 30 bb5: ; preds = %bb2 31 tail call void @raise_exception( ) noreturn 32 unreachable 33 } 34 35 declare i32 @fegetround() 36 37 declare void @raise_exception() noreturn 38
