Revert r302469 "Make it illegal for two Functions to point to the same DISubprogram"

This caused PR32977.

Original commit message:

> Make it illegal for two Functions to point to the same DISubprogram
>
> As recently discussed on llvm-dev [1], this patch makes it illegal for
> two Functions to point to the same DISubprogram and updates
> FunctionCloner to also clone the debug info of a function to conform
> to the new requirement. To simplify the implementation it also factors
> out the creation of inlineAt locations from the Inliner into a
> general-purpose utility in DILocation.
>
> [1] http://lists.llvm.org/pipermail/llvm-dev/2017-May/112661.html
> <rdar://problem/31926379>
>
> Differential Revision: https://reviews.llvm.org/D32975

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302533 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 11 deletions

diff --git a/test/Verifier/metadata-function-dbg.ll b/test/Verifier/metadata-function-dbg.ll
index 6db40943ec38..24989ed7aa2e 100644
--- a/test/Verifier/metadata-function-dbg.ll
+++ b/test/Verifier/metadata-function-dbg.ll
@@ -3,18 +3,12 @@
 ; CHECK:      function declaration may not have a !dbg attachment
 declare !dbg !4 void @f1()
 
-; CHECK:      function must have a single !dbg attachment
-define void @f2() !dbg !4 !dbg !4 {
+define void @f2() !dbg !4 {
   unreachable
 }
 
-; CHECK:      DISubprogram attached to more than one function
-define void @f3() !dbg !4 {
-  unreachable
-}
-
-; CHECK:      DISubprogram attached to more than one function
-define void @f4() !dbg !4 {
+; CHECK:      function must have a single !dbg attachment
+define void @f3() !dbg !4 !dbg !4 {
   unreachable
 }
 
@@ -22,7 +16,7 @@ define void @f4() !dbg !4 {
 ; CHECK:      function !dbg attachment must be a subprogram
 ; CHECK-NEXT: void ()* @bar
 ; CHECK-NEXT: !{{[0-9]+}} = !{}
-define void @bar() !dbg !3 {
+define void @bar() !dbg !6 {
   unreachable
 }
 
@@ -32,5 +26,5 @@ define void @bar() !dbg !3 {
 !llvm.dbg.cu = !{!1}
 !1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2)
 !2 = !DIFile(filename: "t.c", directory: "/path/to/dir")
-!3 = !{}
 !4 = distinct !DISubprogram(name: "foo", scope: !1, file: !2, unit: !1)
+!6 = !{}