1; RUN: opt < %s -constprop -die -S | FileCheck %s
2
3; This is a basic sanity check for constant propagation.  The add instruction
4; should be eliminated.
5define i32 @test1(i1 %B) {
6        br i1 %B, label %BB1, label %BB2
7
8BB1:
9        %Val = add i32 0, 0
10        br label %BB3
11
12BB2:
13        br label %BB3
14
15BB3:
16; CHECK: @test1
17; CHECK: %Ret = phi i32 [ 0, %BB1 ], [ 1, %BB2 ]
18        %Ret = phi i32 [ %Val, %BB1 ], [ 1, %BB2 ]
19        ret i32 %Ret
20}
21
22
23; PR6197
24define i1 @test2(i8* %f) nounwind {
25entry:
26  %V = icmp ne i8* blockaddress(@test2, %bb), null
27  br label %bb
28bb:
29  ret i1 %V
30
31; CHECK: @test2
32; CHECK: ret i1 true
33}
34
35define i1 @TNAN() {
36; CHECK: @TNAN
37; CHECK: ret i1 true
38  %A = fcmp uno double 0x7FF8000000000000, 1.000000e+00
39  %B = fcmp uno double 1.230000e+02, 1.000000e+00
40  %C = or i1 %A, %B
41  ret i1 %C
42}
43