1; RUN: opt -S -jump-threading -dce < %s | FileCheck %s
2target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
3target triple = "x86_64-unknown-linux-gnu"
4
5; Function Attrs: nounwind uwtable
6define i32 @test1(i32 %a, i32 %b) #0 {
7entry:
8  %cmp = icmp sgt i32 %a, 5
9  tail call void @llvm.assume(i1 %cmp)
10  %cmp1 = icmp sgt i32 %b, 1234
11  br i1 %cmp1, label %if.then, label %if.else
12
13; CHECK-LABEL: @test1
14; CHECK: icmp sgt i32 %a, 5
15; CHECK: call void @llvm.assume
16; CHECK-NOT: icmp sgt i32 %a, 3
17; CHECK: ret i32
18
19if.then:                                          ; preds = %entry
20  %cmp2 = icmp sgt i32 %a, 3
21  br i1 %cmp2, label %if.then3, label %return
22
23if.then3:                                         ; preds = %if.then
24  tail call void (...) @bar() #1
25  br label %return
26
27if.else:                                          ; preds = %entry
28  tail call void (...) @car() #1
29  br label %return
30
31return:                                           ; preds = %if.else, %if.then, %if.then3
32  %retval.0 = phi i32 [ 1, %if.then3 ], [ 0, %if.then ], [ 0, %if.else ]
33  ret i32 %retval.0
34}
35
36define i32 @test2(i32 %a) #0 {
37entry:
38  %cmp = icmp sgt i32 %a, 5
39  tail call void @llvm.assume(i1 %cmp)
40  %cmp1 = icmp sgt i32 %a, 3
41  br i1 %cmp1, label %if.then, label %return
42
43; CHECK-LABEL: @test2
44; CHECK: icmp sgt i32 %a, 5
45; CHECK: tail call void @llvm.assume
46; CHECK: tail call void (...) @bar()
47; CHECK: ret i32 1
48
49
50if.then:                                          ; preds = %entry
51  tail call void (...) @bar() #1
52  br label %return
53
54return:                                           ; preds = %entry, %if.then
55  %retval.0 = phi i32 [ 1, %if.then ], [ 0, %entry ]
56  ret i32 %retval.0
57}
58
59; Function Attrs: nounwind
60declare void @llvm.assume(i1) #1
61
62declare void @bar(...)
63
64declare void @car(...)
65
66attributes #0 = { nounwind uwtable }
67attributes #1 = { nounwind }
68
69