1 files changed, 49 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SimplifyCFG/fold-branch-debuginvariant.ll b/llvm/test/Transforms/SimplifyCFG/fold-branch-debuginvariant.ll
new file mode 100644
index 00000000000..7b26b6f95de
--- /dev/null
+++ b/llvm/test/Transforms/SimplifyCFG/fold-branch-debuginvariant.ll
@@ -0,0 +1,49 @@
+; RUN: opt < %s -simplifycfg -S | FileCheck %s
+; RUN: opt < %s -strip-debug -simplifycfg -S | FileCheck %s
+
+; Verify that the and.2 instruction is eliminated even in the presence of a
+; preceding debug intrinsic.
+
+; CHECK-LABEL: bb1:
+; CHECK: and i1 false, false
+; CHECK-LABEL: bb2:
+; CHECK-NOT: and i1 false, false
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; Function Attrs: norecurse nounwind
+define void @foo() local_unnamed_addr #0 !dbg !4 {
+bb1:
+  %and.1 = and i1 false, false
+  %cmp = icmp eq i16 0, 0
+  br i1 %cmp, label %bb2, label %bb3
+
+bb2:                                              ; preds = %bb1
+  call void @llvm.dbg.value(metadata i16 0, metadata !8, metadata !DIExpression()), !dbg !9
+  %and.2 = and i1 false, false
+  br label %bb3
+
+bb3:                                              ; preds = %bb2, %bb1
+  ret void
+}
+
+; Function Attrs: nounwind readnone speculatable
+declare void @llvm.dbg.value(metadata, metadata, metadata) #1
+
+attributes #0 = { norecurse nounwind }
+attributes #1 = { nounwind readnone speculatable }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "Foo", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, globals: !2)
+!1 = !DIFile(filename: "foo.c", directory: "/")
+!2 = !{}
+!3 = !{i32 2, !"Debug Info Version", i32 3}
+!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 10, type: !5, isLocal: false, isDefinition: true, scopeLine: 10, isOptimized: false, unit: !0, retainedNodes: !2)
+!5 = !DISubroutineType(types: !6)
+!6 = !{null, !7}
+!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!8 = !DILocalVariable(name: "p_1", arg: 1, scope: !4, line: 4, type: !7)
+!9 = distinct !DILocation(line: 11, column: 3, scope: !4)