blob: 7980bbdcb12171c7ef08f3fc780ccd257ac7a550 [file] [log] [blame]
Bill Wendlingdc172702013-08-05 23:43:18 +00001; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
Dan Gohman5f71a282009-06-24 01:22:30 +00002
3@mode_table = global [4 x i32] zeroinitializer ; <[4 x i32]*> [#uses=1]
4
Bill Wendlingdc172702013-08-05 23:43:18 +00005; CHECK: max backedge-taken count is 1{{$}}
6
Dan Gohman5f71a282009-06-24 01:22:30 +00007define i8 @f() {
8entry:
9 tail call i32 @fegetround( ) ; <i32>:0 [#uses=1]
10 br label %bb
11
12bb: ; 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]
David Blaikie79e6c742015-02-27 19:29:02 +000015 getelementptr [4 x i32], [4 x i32]* @mode_table, i32 0, i32 %1 ; <i32*>:2 [#uses=1]
David Blaikiea79ac142015-02-27 21:17:42 +000016 load i32, i32* %2, align 4 ; <i32>:3 [#uses=1]
Dan Gohman5f71a282009-06-24 01:22:30 +000017 icmp eq i32 %3, %0 ; <i1>:4 [#uses=1]
18 br i1 %4, label %bb1, label %bb2
19
20bb1: ; preds = %bb
21 ret i8 %mode.0
22
23bb2: ; preds = %bb
24 icmp eq i8 %mode.0, 1 ; <i1>:5 [#uses=1]
25 br i1 %5, label %bb5, label %bb4
26
27bb4: ; preds = %bb2
28 %indvar.next = add i8 %mode.0, 1 ; <i8> [#uses=1]
29 br label %bb
30
31bb5: ; preds = %bb2
32 tail call void @raise_exception( ) noreturn
33 unreachable
34}
35
36declare i32 @fegetround()
37
38declare void @raise_exception() noreturn