| Dan Gohman | 4298d2e | 2010-01-26 19:25:59 +0000 | [diff] [blame^] | 1 | ; RUN: opt < %s -analyze -scalar-evolution \ |
| Dan Gohman | 010449c | 2009-06-24 01:22:30 +0000 | [diff] [blame] | 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 |