1 ; RUN: opt < %s -instcombine -S | FileCheck %s
3 ; Test an already canonical branch to make sure we don't flip those.
4 define i32 @test0(i32 %X, i32 %Y) {
5 %C = icmp eq i32 %X, %Y
6 br i1 %C, label %T, label %F, !prof !0
9 ; CHECK: %C = icmp eq i32 %X, %Y
10 ; CHECK: br i1 %C, label %T, label %F
18 define i32 @test1(i32 %X, i32 %Y) {
19 %C = icmp ne i32 %X, %Y
20 br i1 %C, label %T, label %F, !prof !1
22 ; CHECK-LABEL: @test1(
23 ; CHECK: %C = icmp eq i32 %X, %Y
24 ; CHECK: br i1 %C, label %F, label %T
32 define i32 @test2(i32 %X, i32 %Y) {
33 %C = icmp ule i32 %X, %Y
34 br i1 %C, label %T, label %F, !prof !2
36 ; CHECK-LABEL: @test2(
37 ; CHECK: %C = icmp ugt i32 %X, %Y
38 ; CHECK: br i1 %C, label %F, label %T
46 define i32 @test3(i32 %X, i32 %Y) {
47 %C = icmp uge i32 %X, %Y
48 br i1 %C, label %T, label %F, !prof !3
50 ; CHECK-LABEL: @test3(
51 ; CHECK: %C = icmp ult i32 %X, %Y
52 ; CHECK: br i1 %C, label %F, label %T
60 !0 = metadata !{metadata !"branch_weights", i32 1, i32 2}
61 !1 = metadata !{metadata !"branch_weights", i32 3, i32 4}
62 !2 = metadata !{metadata !"branch_weights", i32 5, i32 6}
63 !3 = metadata !{metadata !"branch_weights", i32 7, i32 8}
64 ; Base case shouldn't change.
65 ; CHECK: !0 = {{.*}} i32 1, i32 2}
66 ; Ensure that the branch metadata is reversed to match the reversals above.
67 ; CHECK: !1 = {{.*}} i32 4, i32 3}
68 ; CHECK: !2 = {{.*}} i32 6, i32 5}
69 ; CHECK: !3 = {{.*}} i32 8, i32 7}