Merge pull request #245 from GaloisInc/dgb_1691624043-0

Add known_bug and test for llvm-pretty Issue #124.

disasm-test/known_bugs/llvm-pretty_issue124

@@ -0,0 +1,16 @@
+##> rootMatchName: derivedtype.c derivedtype.ll
+##> summary: Invalid DIDerivedType metadata for structures
+
+  clang 10.0.1
+    derivedtype.c
+      llvm-range=pre-llvm12
+        derivedtype:                                 DWARF address space only applies to pointer or reference types
+!15 = !DIDerivedType(tag: DW_TAG_member, name: "msglen", file: !1, line: 1, baseType: !11, size: 32, dwarfAddressSpace: 0)
+DWARF address space only applies to pointer or reference types
+!16 = !DIDerivedType(tag: DW_TAG_member, name: "msgptr", file: !1, line: 1, baseType: !17, size: 64, offset: 64, dwarfAddressSpace: 0)
+warning: ignoring invalid debug info in /tmp/nix-shell.1cMNgw/derivedtypellvm-disasm117145-18.ll
+FAIL (0.05s)
+          disasm-test/Main.hs:454:
+          diff failed
+          --- /tmp/nix-shell.1cMNgw/derivedtypellvm-disasm117145-19.ast 2023-08-09 16:25:42.324488325 -0700
+          +++ /tmp/nix-shell.1cMNgw/derivedtypellvm-disasm117145-23.ast 2023-08-09 16:25:42.351488125 -0700

disasm-test/tests/derivedtype.c

@@ -0,0 +1,5 @@
+struct message { int msglen; char* msgptr; };
+
+int foo(struct message* mptr) {
+    return mptr->msglen;
+}

disasm-test/tests/derivedtype.ll

@@ -0,0 +1,52 @@
+; ModuleID = 'derivedtype.bc'
+source_filename = "derivedtype.c"
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%struct.message = type { i32, i8* }
+
+; Function Attrs: noinline nounwind optnone sspstrong uwtable
+define i32 @foo(%struct.message* %0) #0 !dbg !8 {
+  %2 = alloca %struct.message*, align 8
+  store %struct.message* %0, %struct.message** %2, align 8
+  call void @llvm.dbg.declare(metadata %struct.message** %2, metadata !19, metadata !DIExpression()), !dbg !20
+  %3 = load %struct.message*, %struct.message** %2, align 8, !dbg !21
+  %4 = getelementptr inbounds %struct.message, %struct.message* %3, i32 0, i32 0, !dbg !22
+  %5 = load i32, i32* %4, align 8, !dbg !22
+  ret i32 %5, !dbg !23
+}
+
+; Function Attrs: nounwind readnone speculatable willreturn
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+attributes #0 = { noinline nounwind optnone sspstrong uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="4" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { nounwind readnone speculatable willreturn }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4, !5, !6}
+!llvm.ident = !{!7}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.1 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
+!1 = !DIFile(filename: "derivedtype.c", directory: "/home/kquick/work/RISE/llvm-regr5/disasm-test/tests")
+!2 = !{}
+!3 = !{i32 7, !"Dwarf Version", i32 4}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!5 = !{i32 1, !"wchar_size", i32 4}
+!6 = !{i32 7, !"PIC Level", i32 2}
+!7 = !{!"clang version 10.0.1 "}
+!8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !9, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
+!9 = !DISubroutineType(types: !10)
+!10 = !{!11, !12}
+!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64)
+!13 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "message", file: !1, line: 1, size: 128, elements: !14)
+!14 = !{!15, !16}
+!15 = !DIDerivedType(tag: DW_TAG_member, name: "msglen", scope: !13, file: !1, line: 1, baseType: !11, size: 32)
+!16 = !DIDerivedType(tag: DW_TAG_member, name: "msgptr", scope: !13, file: !1, line: 1, baseType: !17, size: 64, offset: 64)
+!17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64)
+!18 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!19 = !DILocalVariable(name: "mptr", arg: 1, scope: !8, file: !1, line: 3, type: !12)
+!20 = !DILocation(line: 3, column: 25, scope: !8)
+!21 = !DILocation(line: 4, column: 12, scope: !8)
+!22 = !DILocation(line: 4, column: 18, scope: !8)
+!23 = !DILocation(line: 4, column: 5, scope: !8)