1 files changed, 101 insertions, 0 deletions
diff --git a/llvm/test/DebugInfo/X86/bbjoin.ll b/llvm/test/DebugInfo/X86/bbjoin.ll
new file mode 100644
index 00000000000..8061a8d2ce9
--- /dev/null
+++ b/llvm/test/DebugInfo/X86/bbjoin.ll
@@ -0,0 +1,101 @@
+; RUN: llc -mtriple=x86_64-apple-macosx10.9.0 %s -stop-after=livedebugvars \
+; RUN:   -o %t.s | FileCheck %s
+; Generated from:
+; void g(int *);
+; int f() {
+;   int x = 23;
+;   g(&x);
+;   if (x == 42)
+;     ++x;
+;   return x; // check that x is not a constant here.
+; }
+; CHECK: ![[X:.*]] = !DILocalVariable(name: "x",
+; CHECK: bb.0.entry:
+; CHECK:   DBG_VALUE 23, 0, ![[X]],
+; CHECK:   DBG_VALUE debug-use %rdi, debug-use _, ![[X]]
+; CHECK: bb.1.if.then:
+; CHECK:   DBG_VALUE debug-use %rdi, debug-use _, ![[X]],
+; CHECK: bb.2.if.end:
+; CHECK-NOT:  DBG_VALUE 23, 0, ![[X]],
+; CHECK:   RETQ %eax
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.11.0"
+
+; Function Attrs: nounwind ssp uwtable
+define i32 @f() #0 !dbg !4 {
+entry:
+  %x = alloca i32, align 4
+  %0 = bitcast i32* %x to i8*, !dbg !14
+  call void @llvm.lifetime.start(i64 4, i8* %0) #4, !dbg !14
+  tail call void @llvm.dbg.value(metadata i32 23, i64 0, metadata !9, metadata !15), !dbg !16
+  store i32 23, i32* %x, align 4, !dbg !16, !tbaa !17
+  tail call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !9, metadata !15), !dbg !16
+  call void @g(i32* nonnull %x) #4, !dbg !21
+  call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !9, metadata !15), !dbg !16
+  %1 = load i32, i32* %x, align 4, !dbg !22, !tbaa !17
+  %cmp = icmp eq i32 %1, 42, !dbg !24
+  br i1 %cmp, label %if.then, label %if.end, !dbg !25
+
+if.then:                                          ; preds = %entry
+  call void @llvm.dbg.value(metadata i32 43, i64 0, metadata !9, metadata !15), !dbg !16
+  store i32 43, i32* %x, align 4, !dbg !26, !tbaa !17
+  br label %if.end, !dbg !26
+
+if.end:                                           ; preds = %if.then, %entry
+  %2 = phi i32 [ 43, %if.then ], [ %1, %entry ], !dbg !27
+  call void @llvm.dbg.value(metadata i32* %x, i64 0, metadata !9, metadata !15), !dbg !16
+  call void @llvm.lifetime.end(i64 4, i8* %0) #4, !dbg !28
+  ret i32 %2, !dbg !29
+}
+
+; Function Attrs: argmemonly nounwind
+declare void @llvm.lifetime.start(i64, i8* nocapture) #1
+
+declare void @g(i32*) #4
+
+; Function Attrs: argmemonly nounwind
+declare void @llvm.lifetime.end(i64, i8* nocapture) #1
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
+
+attributes #0 = { nounwind ssp uwtable }
+attributes #1 = { argmemonly nounwind }
+attributes #3 = { nounwind readnone }
+attributes #4 = { nounwind }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!10, !11, !12}
+!llvm.ident = !{!13}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 255890) (llvm/trunk 255919)", isOptimized: true, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3)
+!1 = !DIFile(filename: "constant.c", directory: "")
+!2 = !{}
+!3 = !{!4}
+!4 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: true, variables: !8)
+!5 = !DISubroutineType(types: !6)
+!6 = !{!7}
+!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
+!8 = !{!9}
+!9 = !DILocalVariable(name: "x", scope: !4, file: !1, line: 3, type: !7)
+!10 = !{i32 2, !"Dwarf Version", i32 2}
+!11 = !{i32 2, !"Debug Info Version", i32 3}
+!12 = !{i32 1, !"PIC Level", i32 2}
+!13 = !{!"clang version 3.8.0 (trunk 255890) (llvm/trunk 255919)"}
+!14 = !DILocation(line: 3, column: 3, scope: !4)
+!15 = !DIExpression()
+!16 = !DILocation(line: 3, column: 7, scope: !4)
+!17 = !{!18, !18, i64 0}
+!18 = !{!"int", !19, i64 0}
+!19 = !{!"omnipotent char", !20, i64 0}
+!20 = !{!"Simple C/C++ TBAA"}
+!21 = !DILocation(line: 4, column: 3, scope: !4)
+!22 = !DILocation(line: 5, column: 7, scope: !23)
+!23 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 7)
+!24 = !DILocation(line: 5, column: 9, scope: !23)
+!25 = !DILocation(line: 5, column: 7, scope: !4)
+!26 = !DILocation(line: 6, column: 5, scope: !23)
+!27 = !DILocation(line: 7, column: 10, scope: !4)
+!28 = !DILocation(line: 8, column: 1, scope: !4)
+!29 = !DILocation(line: 7, column: 3, scope: !4)