| ; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s |
| |
| @mode_table = global [4 x i32] zeroinitializer ; <[4 x i32]*> [#uses=1] |
| |
| ; CHECK: max backedge-taken count is 1{{$}} |
| |
| define i8 @f() { |
| entry: |
| tail call i32 @fegetround( ) ; <i32>:0 [#uses=1] |
| br label %bb |
| |
| bb: ; preds = %bb4, %entry |
| %mode.0 = phi i8 [ 0, %entry ], [ %indvar.next, %bb4 ] ; <i8> [#uses=4] |
| zext i8 %mode.0 to i32 ; <i32>:1 [#uses=1] |
| getelementptr [4 x i32], [4 x i32]* @mode_table, i32 0, i32 %1 ; <i32*>:2 [#uses=1] |
| load i32, i32* %2, align 4 ; <i32>:3 [#uses=1] |
| icmp eq i32 %3, %0 ; <i1>:4 [#uses=1] |
| br i1 %4, label %bb1, label %bb2 |
| |
| bb1: ; preds = %bb |
| ret i8 %mode.0 |
| |
| bb2: ; preds = %bb |
| icmp eq i8 %mode.0, 1 ; <i1>:5 [#uses=1] |
| br i1 %5, label %bb5, label %bb4 |
| |
| bb4: ; preds = %bb2 |
| %indvar.next = add i8 %mode.0, 1 ; <i8> [#uses=1] |
| br label %bb |
| |
| bb5: ; preds = %bb2 |
| tail call void @raise_exception( ) noreturn |
| unreachable |
| } |
| |
| declare i32 @fegetround() |
| |
| declare void @raise_exception() noreturn |
