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1; RUN: llc -stop-after=branch-folder < %s | FileCheck %s2;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 that5; 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 $eflags10; CHECK-NEXT: JCC_1{{.*}}, debug-location [[DLOC]]11 12target triple = "x86_64-unknown-linux-gnu"13 14define i32 @foo(i1 %b, ptr %p) {15bb1: 16 br i1 %b, label %bb2, label %bb317 18bb2:19 %a1 = icmp eq ptr %p, null20 br i1 %a1, label %bb4, label %bb5, !dbg !621 22bb3:23 %a2 = icmp eq ptr %p, null24 br i1 %a2, label %bb4, label %bb5, !dbg !625 26bb4:27 ret i32 128 29bb5:30 ret i32 031}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