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- ; 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
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