Revert "[IR] Remove the DIExpression field from DIGlobalVariable."

This reverts commit 289920 (again).
I forgot to implement a Bitcode upgrade for the case where a DIGlobalVariable
has not DIExpression. Unfortunately it is not possible to safely upgrade
these variables without adding a flag to the bitcode record indicating which
version they are.
My plan of record is to roll the planned follow-up patch that adds a
unit: field to DIGlobalVariable into this patch before recomitting.
This way we only need one Bitcode upgrade for both changes (with a
version flag in the bitcode record to safely distinguish the record
formats).

Sorry for the churn!

llvm-svn: 289982

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/test/Transforms/Util/strip-nonlinetable-debuginfo-containingtypes.ll b/llvm/test/Transforms/Util/strip-nonlinetable-debuginfo-containingtypes.ll
index f21710a1b12..6c6b4996bfe 100644
--- a/llvm/test/Transforms/Util/strip-nonlinetable-debuginfo-containingtypes.ll
+++ b/llvm/test/Transforms/Util/strip-nonlinetable-debuginfo-containingtypes.ll
@@ -51,7 +51,7 @@ attributes #2 = { nounwind }
 
 ; CHECK-NEG-NOT: !DI{{Basic|Composite|Derived}}Type
 
-!0 = distinct !DIGlobalVariableExpression(var: !DIGlobalVariable(name: "b", scope: !1, file: !2, line: 5, type: !5, isLocal: false, isDefinition: true))
+!0 = distinct !DIGlobalVariable(name: "b", scope: !1, file: !2, line: 5, type: !5, isLocal: false, isDefinition: true)
 !1 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 4.0.0 (trunk 282583) (llvm/trunk 282611)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !3, globals: !4)
 !2 = !DIFile(filename: "t.cpp", directory: "/")
 !3 = !{}