1 files changed, 42 insertions, 0 deletions
diff --git a/test/CodeGen/X86/tail-merge-debugloc.ll b/test/CodeGen/X86/tail-merge-debugloc.ll
new file mode 100644
index 0000000000000..197b0b8032577
--- /dev/null
+++ b/test/CodeGen/X86/tail-merge-debugloc.ll
@@ -0,0 +1,42 @@
+; RUN: llc -stop-after=branch-folder < %s | FileCheck %s
+;
+; bb2 and bb3 in the IR below will be tail-merged into a single basic block.
+; As br instructions in bb2 and bb3 have the same debug location, make sure that
+; the branch instruction in the merged basic block still maintains the debug 
+; location info.
+; 
+; CHECK:      [[DLOC:![0-9]+]] = !DILocation(line: 2, column: 2, scope: !{{[0-9]+}})
+; CHECK:      TEST64rr{{.*}}%rsi, %rsi, implicit-def %eflags
+; CHECK-NEXT: JNE_1{{.*}}, debug-location [[DLOC]]
+
+target triple = "x86_64-unknown-linux-gnu"
+
+define i32 @foo(i1 %b, i8* %p) {
+bb1: 
+  br i1 %b, label %bb2, label %bb3
+
+bb2:
+  %a1 = icmp eq i8* %p, null
+  br i1 %a1, label %bb4, label %bb5, !dbg !6
+  
+bb3:
+  %a2 = icmp eq i8* %p, null
+  br i1 %a2, label %bb4, label %bb5, !dbg !6
+
+bb4:
+  ret i32 1
+
+bb5:
+  ret i32 0
+}
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!2, !3}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1)
+!1 = !DIFile(filename: "foo.c", directory: "b/")
+!2 = !{i32 2, !"Dwarf Version", i32 4}
+!3 = !{i32 2, !"Debug Info Version", i32 3}
+!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0)
+!5 = distinct !DILexicalBlock(scope: !4, file: !1, line: 1, column: 1)
+!6 = !DILocation(line: 2, column: 2, scope: !5)