1; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
2
3; CHECK-NOT: switch
4        %llvm.dbg.anchor.type = type { i32, i32 }
5        %llvm.dbg.compile_unit.type = type { i32, { }*, i32, i8*, i8*, i8*, i1, i1, i8* }
6
7@llvm.dbg.compile_units = linkonce constant %llvm.dbg.anchor.type { i32 458752, i32 17 }, section "llvm.metadata"
8
9@.str = internal constant [4 x i8] c"a.c\00", section "llvm.metadata"		; <[4 x i8]*> [#uses=1]
10@.str1 = internal constant [6 x i8] c"/tmp/\00", section "llvm.metadata"	; <[6 x i8]*> [#uses=1]
11@.str2 = internal constant [55 x i8] c"4.2.1 (Based on Apple Inc. build 5636) (LLVM build 00)\00", section "llvm.metadata"		; <[55 x i8]*> [#uses=1]
12@llvm.dbg.compile_unit = internal constant %llvm.dbg.compile_unit.type { i32 458769, { }* bitcast (%llvm.dbg.anchor.type* @llvm.dbg.compile_units to { }*), i32 1, i8* getelementptr ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i8* getelementptr ([6 x i8], [6 x i8]* @.str1, i32 0, i32 0), i8* getelementptr ([55 x i8], [55 x i8]* @.str2, i32 0, i32 0), i1 true, i1 false, i8* null }, section "llvm.metadata"		; <%llvm.dbg.compile_unit.type*> [#uses=1]
13
14declare void @llvm.dbg.stoppoint(i32, i32, { }*) nounwind
15
16; Test folding all to same dest
17define i32 @test3(i1 %C) {
18        br i1 %C, label %Start, label %TheDest
19Start:          ; preds = %0
20call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
21        switch i32 3, label %TheDest [
22                 i32 0, label %TheDest
23                 i32 1, label %TheDest
24                 i32 2, label %TheDest
25                 i32 5, label %TheDest
26        ]
27TheDest:                ; preds = %Start, %Start, %Start, %Start, %Start, %0
28        ret i32 1234
29}
30
31; Test folding switch -> branch
32define i32 @test4(i32 %C) {
33        switch i32 %C, label %L1 [
34                 i32 0, label %L2
35        ]
36L1:             ; preds = %0
37call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
38        ret i32 0
39L2:             ; preds = %0
40call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
41        ret i32 1
42}
43
44; Can fold into a cond branch!
45define i32 @test5(i32 %C) {
46        switch i32 %C, label %L1 [
47                 i32 0, label %L2
48                 i32 123, label %L1
49        ]
50L1:             ; preds = %0, %0
51call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
52        ret i32 0
53L2:             ; preds = %0
54call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
55        ret i32 1
56}
57
58