Debug Info Finder|Verifier: handle DbgLoc attached to instructions.

Also remove checking of llvm.dbg.sp since it is not used in generating dwarf.

Current state of Finder:
DebugInfoFinder tries to list all debug info MDNodes used in a module. To
list debug info MDNodes used by an instruction, DebugInfoFinder provides
processDeclare, processValue and processLocation to handle DbgDeclareInst,
DbgValueInst and DbgLoc attached to instructions. processModule will go
through all DICompileUnits in llvm.dbg.cu and list debug info MDNodes
used by the CUs.

TODO:
1> Finder has a list of CUs, SPs, Types, Scopes and global variables. We
need to add a list of variables that are used by DbgDeclareInst and
DbgValueInst.
2> MDString fields should be null or isa<MDString> and MDNode fields should be
null or isa<MDNode>. We currently use empty string or int 0 to represent null.
3> Go though Verify functions and make sure that they check field types.
4> Clean up existing testing cases to remove llvm.dbg.sp and make sure each
testing case has a llvm.dbg.cu.

Re-apply r187609 with fix to pass ocaml binding. vmcore.ml generates a debug
location with scope being metadata !{}, in verifier we treat this as a null
scope.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187812 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 4 deletions

diff --git a/test/BugPoint/metadata.ll b/test/BugPoint/metadata.ll
index 0eda5667ba..2ba1a9f210 100644
--- a/test/BugPoint/metadata.ll
+++ b/test/BugPoint/metadata.ll
@@ -4,10 +4,12 @@
 
 ; Bugpoint should keep the call's metadata attached to the call.
 
-; CHECK: call void @foo(), !dbg !0, !attach !2
+; CHECK: call void @foo(), !dbg !0, !attach !4
 ; CHECK: !0 = metadata !{i32 104, i32 105, metadata !1, metadata !1}
-; CHECK: !1 = metadata !{i32 0, i32 0, i32 0, metadata !"source.c", metadata !"/dir", metadata !"me", i1 true, i1 false, metadata !"", i32 0}
-; CHECK: !2 = metadata !{metadata !"the call to foo"}
+; CHECK: !1 = metadata !{i32 458769, metadata !2, i32 0, metadata !"me", i1 true, metadata !"", i32 0, metadata !3, metadata !3, null, null, null, metadata !""}
+; CHECK: !2 = metadata !{metadata !"source.c", metadata !"/dir"}
+; CHECK: !3 = metadata !{i32 0}
+; CHECK: !4 = metadata !{metadata !"the call to foo"}
 
 %rust_task = type {}
 define void @test(i32* %a, i8* %b) {
@@ -27,9 +29,11 @@ declare void @foo()
 !3 = metadata !{metadata !"noise"}
 !4 = metadata !{metadata !"filler"}
 
-!9 = metadata !{i32 0, i32 0, i32 0, metadata !"source.c", metadata !"/dir", metadata !"me", i1 true, i1 false, metadata !"", i32 0}
+!9 = metadata !{i32 458769, metadata !15, i32 0, metadata !"me", i1 true, metadata !"", i32 0, metadata !16, metadata !16, null, null, null, metadata !""}
 !10 = metadata !{i32 100, i32 101, metadata !9, metadata !9}
 !11 = metadata !{i32 102, i32 103, metadata !9, metadata !9}
 !12 = metadata !{i32 104, i32 105, metadata !9, metadata !9}
 !13 = metadata !{i32 106, i32 107, metadata !9, metadata !9}
 !14 = metadata !{i32 108, i32 109, metadata !9, metadata !9}
+!15 = metadata !{metadata !"source.c", metadata !"/dir"}
+!16 = metadata !{i32 0}