1 ; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s 2 3 @mode_table = global [4 x i32] zeroinitializer ; <[4 x i32]*> [#uses=1] 4 5 ; CHECK: max backedge-taken count is 1{{$}} 6 7 define i8 @f() { 8 entry: 9 tail call i32 @fegetround( ) ; <i32>:0 [#uses=1] 10 br label %bb 11 12 bb: ; preds = %bb4, %entry 13 %mode.0 = phi i8 [ 0, %entry ], [ %indvar.next, %bb4 ] ; <i8> [#uses=4] 14 zext i8 %mode.0 to i32 ; <i32>:1 [#uses=1] 15 getelementptr [4 x i32], [4 x i32]* @mode_table, i32 0, i32 %1 ; <i32*>:2 [#uses=1] 16 load i32, i32* %2, align 4 ; <i32>:3 [#uses=1] 17 icmp eq i32 %3, %0 ; <i1>:4 [#uses=1] 18 br i1 %4, label %bb1, label %bb2 19 20 bb1: ; preds = %bb 21 ret i8 %mode.0 22 23 bb2: ; preds = %bb 24 icmp eq i8 %mode.0, 1 ; <i1>:5 [#uses=1] 25 br i1 %5, label %bb5, label %bb4 26 27 bb4: ; preds = %bb2 28 %indvar.next = add i8 %mode.0, 1 ; <i8> [#uses=1] 29 br label %bb 30 31 bb5: ; preds = %bb2 32 tail call void @raise_exception( ) noreturn 33 unreachable 34 } 35 36 declare i32 @fegetround() 37 38 declare void @raise_exception() noreturn 39
