1; RUN: llc -stop-after=branch-folder < %s | FileCheck %s
2;
3; bb2 and bb3 in the IR below will be tail-merged into a single basic block.
4; As br instructions in bb2 and bb3 have the same debug location, make sure that
5; the branch instruction in the merged basic block still maintains the debug
6; location info.
7;
8; CHECK:      [[DLOC:![0-9]+]] = !DILocation(line: 2, column: 2, scope: !{{[0-9]+}})
9; CHECK:      TEST64rr{{.*}}$rsi, renamable $rsi, implicit-def $eflags
10; CHECK-NEXT: JCC_1{{.*}}, debug-location [[DLOC]]
11
12target triple = "x86_64-unknown-linux-gnu"
13
14define i32 @foo(i1 %b, i8* %p) {
15bb1:
16  br i1 %b, label %bb2, label %bb3
17
18bb2:
19  %a1 = icmp eq i8* %p, null
20  br i1 %a1, label %bb4, label %bb5, !dbg !6
21
22bb3:
23  %a2 = icmp eq i8* %p, null
24  br i1 %a2, label %bb4, label %bb5, !dbg !6
25
26bb4:
27  ret i32 1
28
29bb5:
30  ret i32 0
31}
32
33!llvm.dbg.cu = !{!0}
34!llvm.module.flags = !{!2, !3}
35
36!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1)
37!1 = !DIFile(filename: "foo.c", directory: "b/")
38!2 = !{i32 2, !"Dwarf Version", i32 4}
39!3 = !{i32 2, !"Debug Info Version", i32 3}
40!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0)
41!5 = distinct !DILexicalBlock(scope: !4, file: !1, line: 1, column: 1)
42!6 = !DILocation(line: 2, column: 2, scope: !5)
43