[llvm] r233756 - Verifier: Add a testcase for verifying type refs

[Duncan P. N. Exon Smith]

Author: dexonsmith
Date: Tue Mar 31 15:57:56 2015
New Revision: 233756

URL: http://llvm.org/viewvc/llvm-project?rev=233756&view=rev
Log:
Verifier: Add a testcase for verifying type refs

r233664 fixed the `Verifier` so that it doesn't crash on bad type refs.
This deserves a test!

Added:
    llvm/trunk/test/Verifier/dbg-typerefs.ll

Added: llvm/trunk/test/Verifier/dbg-typerefs.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Verifier/dbg-typerefs.ll?rev=233756&view=auto
==============================================================================
--- llvm/trunk/test/Verifier/dbg-typerefs.ll (added)
+++ llvm/trunk/test/Verifier/dbg-typerefs.ll Tue Mar 31 15:57:56 2015
@@ -0,0 +1,32 @@
+; RUN: not llvm-as -disable-output <%s 2>&1 | FileCheck %s
+; Check that the debug info verifier gives nice errors for bad type refs
+; (rather than crashing).
+!llvm.module.flags = !{!0}
+!0 = !{i32 2, !"Debug Info Version", i32 3}
+
+; Make a bunch of type references.  Note that !4 references !"0.bad" (instead
+; of !"4.bad") to test error ordering.
+!typerefs = !{!1, !2, !3, !4}
+!1 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: !"1.good")
+!2 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: !"2.bad")
+!3 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: !"3.good")
+!4 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: !"0.bad")
+
+; Add a minimal compile unit to resolve some of the type references.
+!llvm.dbg.cu = !{!5}
+!5 = !MDCompileUnit(file: !6, language: DW_LANG_C99, retainedTypes: !7)
+!6 = !MDFile(filename: "file.c", directory: "/path/to/dir")
+!7 = !{!8, !9}
+!8 = !MDCompositeType(tag: DW_TAG_structure_type, identifier: "1.good")
+!9 = !MDCompositeType(tag: DW_TAG_structure_type, identifier: "3.good")
+
+; CHECK:      assembly parsed, but does not verify
+; CHECK-NEXT: unresolved type ref
+; CHECK-NEXT: !"0.bad"
+; CHECK-NEXT: !MDDerivedType(tag: DW_TAG_pointer_type
+; CHECK-SAME:                baseType: !"0.bad"
+; CHECK-NEXT: unresolved type ref
+; CHECK-NEXT: !"2.bad"
+; CHECK-NEXT: !MDDerivedType(tag: DW_TAG_pointer_type
+; CHECK-SAME:                baseType: !"2.bad"
+; CHECK-NOT:  unresolved