[Verifier] Reject invalid type for DILocalVariable.

[aprantl]

There's a type in a test, but otherwise, this LGTM.

llvm/test/Verifier/di-subroutine-localvar.ll

5

Typo

[davide]

fix typo
x

llvm/lib/IR/Verifier.cpp

 void Verifier::visitDILocalVariable(const DILocalVariable &N) {
   // Checks common to all variables.
   visitDIVariable(N);
 
   AssertDI(isType(N.getRawType()), "invalid type ref", &N, N.getRawType());
   AssertDI(N.getTag() == dwarf::DW_TAG_variable, "invalid tag", &N);
   AssertDI(N.getRawScope() && isa<DILocalScope>(N.getRawScope()),
            "local variable requires a valid scope", &N, N.getRawScope());
+  if (auto Ty = N.getType())
+    AssertDI(!isa<DISubroutineType>(Ty), "invalid type", &N, N.getType());
 }
 
 void Verifier::visitDILabel(const DILabel &N) {
   if (auto *S = N.getRawScope())
     AssertDI(isa<DIScope>(S), "invalid scope", &N, S);
   if (auto *F = N.getRawFile())
     AssertDI(isa<DIFile>(F), "invalid file", &N, F);
 

llvm/test/DebugInfo/Generic/varargs.ll

 !18 = !{i32 2, !"Dwarf Version", i32 2}
 !19 = !{i32 1, !"Debug Info Version", i32 3}
 !20 = !{!"clang version 3.5 "}
 !21 = !DILocalVariable(name: "c", line: 13, arg: 1, scope: !14, file: !15, type: !10)
 !22 = !DILocation(line: 13, scope: !14)
 !23 = !DILocalVariable(name: "a", line: 16, scope: !14, file: !15, type: !4)
 !24 = !DILocation(line: 16, scope: !14)
 ; Manually modifed to avoid dependence on pointer size
-!25 = !DILocalVariable(name: "fptr", line: 18, scope: !14, file: !15, type: !16)
+!25 = !DILocalVariable(name: "fptr", line: 18, scope: !14, file: !15, type: !26)
 !26 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !16)
 !27 = !DILocation(line: 18, scope: !14)
 !28 = !DILocation(line: 22, scope: !14)

llvm/test/Verifier/di-subroutine-localvar.ll

+; RUN: opt %s -verify 2>&1 | FileCheck %s
+; CHECK: invalid type
+; CHECK: !20 = !DILocalVariable(name: "f", scope: !21, file: !13, line: 970, type: !14)
+; CHECK: !14 = !DISubroutineType(types: !15)
+
+
+%timespec.0.1.2.3.0.1.2 = type { i64, i64 }
+define internal i64 @init_vdso_clock_gettime(i32, %timespec.0.1.2.3.0.1.2* nonnull) unnamed_addr !dbg !142 {
+  call void @llvm.dbg.value(metadata i64 (i32, %timespec.0.1.2.3.0.1.2*)* null, metadata !162, metadata !DIExpression()), !dbg !167
+  ret i64 -38, !dbg !168
+}
+declare void @llvm.dbg.value(metadata, metadata, metadata) #0
+!llvm.module.flags = !{!0}
+!llvm.dbg.cu = !{!1}
+!0 = !{i32 2, !"Debug Info Version", i32 3}
+!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "zig 0.3.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !3, globals: !76)
+!2 = !DIFile(filename: "test", directory: ".")
+!3 = !{!4}
+!4 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "Arch", scope: !5, file: !5, line: 44, baseType: !6, size: 8, align: 8, elements: !7)
+!5 = !DIFile(filename: "builtin.zig", directory: "/home/andy/.local/share/zig/stage1/builtin/ugMGxVES9OkDAffv3xhJS3KQVy0Wm1xPM3Bc6x4MBuup5aetdi5pVTrGRG2aDAn0")
+!6 = !DIBasicType(name: "u7", size: 8, encoding: DW_ATE_unsigned)
+!7 = !{!8}
+!8 = !DIEnumerator(name: "armv8_5a", value: 0)
+!76 = !{!77}
+!77 = !DIGlobalVariableExpression(var: !78, expr: !DIExpression())
+!78 = distinct !DIGlobalVariable(name: "arch", linkageName: "arch", scope: !5, file: !5, line: 437, type: !4, isLocal: true, isDefinition: true)
+!81 = !DIFile(filename: "index.zig", directory: "/store/dev/zig/build-llvm8-debug/lib/zig/std/os/linux")
+!142 = distinct !DISubprogram(name: "init_vdso_clock_gettime", scope: !81, file: !81, line: 968, type: !143, scopeLine: 968, flags: DIFlagStaticMember, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !1, retainedNodes: !153)
+!143 = !DISubroutineType(types: !144)
+!144 = !{!145}
+!145 = !DIBasicType(name: "usize", size: 64, encoding: DW_ATE_unsigned)
+!146 = !DIBasicType(name: "i32", size: 32, encoding: DW_ATE_signed)
+!153 = !{!154}
+!154 = !DILocalVariable(name: "clk", arg: 1, scope: !142, file: !81, line: 968, type: !146)
+!162 = !DILocalVariable(name: "f", scope: !163, file: !81, line: 970, type: !143)
+!163 = distinct !DILexicalBlock(scope: !164, file: !81, line: 969, column: 5)
+!164 = distinct !DILexicalBlock(scope: !165, file: !81, line: 968, column: 66)
+!165 = distinct !DILexicalBlock(scope: !166, file: !81, line: 968, column: 45)
+!166 = distinct !DILexicalBlock(scope: !142, file: !81, line: 968, column: 35)
+!167 = !DILocation(line: 970, column: 5, scope: !163)
+!168 = !DILocation(line: 972, column: 28, scope: !169)
+!169 = distinct !DILexicalBlock(scope: !163, file: !81, line: 970, column: 5)