Verifier: Disallow a line number without a file in DISubprogram

A line number doesn't make much sense if you don't say where it's
from. Add a verifier check for this and update some tests that had
bogus debug info.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@295516 91177308-0d34-0410-b5e6-96231b3b80d8

lib/IR/Verifier.cpp

@@ -1025,6 +1025,8 @@ void Verifier::visitDISubprogram(const DISubprogram &N) {
   AssertDI(isScope(N.getRawScope()), "invalid scope", &N, N.getRawScope());
   if (auto *F = N.getRawFile())
     AssertDI(isa<DIFile>(F), "invalid file", &N, F);
+  else
+    AssertDI(N.getLine() == 0, "line specified with no file", &N, N.getLine());
   if (auto *T = N.getRawType())
     AssertDI(isa<DISubroutineType>(T), "invalid subroutine type", &N, T);
   AssertDI(isType(N.getRawContainingType()), "invalid containing type", &N,

test/CodeGen/AMDGPU/vi-removed-intrinsics.ll

@@ -1,6 +1,6 @@
 ; RUN: not llc -march=amdgcn -mcpu=tonga < %s 2>&1 | FileCheck -check-prefix=ERROR %s
 
-; ERROR: error: :1:42: in function rsq_legacy_f32 void (float addrspace(1)*, float): intrinsic not supported on subtarget
+; ERROR: error: foo.cl:1:42: in function rsq_legacy_f32 void (float addrspace(1)*, float): intrinsic not supported on subtarget
 
 declare float @llvm.amdgcn.rsq.legacy(float) #0
 
@@ -21,4 +21,4 @@ attributes #1 = { nounwind }
 !2 = !{i32 2, !"Dwarf Version", i32 4}
 !3 = !{i32 2, !"Debug Info Version", i32 3}
 !4 = !DILocation(line: 1, column: 42, scope: !5)
-!5 = distinct !DISubprogram(name: "rsq_legacy_f32", scope: null, line: 1, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: false, unit: !0)
+!5 = distinct !DISubprogram(name: "rsq_legacy_f32", scope: null, file: !1, line: 1, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: false, unit: !0)

test/DebugInfo/Generic/2010-01-05-DbgScope.ll

@@ -13,7 +13,7 @@ entry:
 
 !0 = !DILocation(line: 571, column: 3, scope: !1)
 !1 = distinct !DILexicalBlock(line: 1, column: 1, file: !11, scope: !2)
-!2 = distinct !DISubprogram(name: "foo", linkageName: "foo", line: 561, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !3, scope: !3, type: !4)
+!2 = distinct !DISubprogram(name: "foo", linkageName: "foo", file: !11, line: 561, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !3, scope: !3, type: !4)
 !3 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang 1.1", isOptimized: true, emissionKind: FullDebug, file: !11, enums: !12, retainedTypes: !12)
 !4 = !DISubroutineType(types: !5)
 !5 = !{!6}

test/Linker/2011-08-18-unique-class-type2.ll

@@ -21,7 +21,7 @@ declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.0 (trunk 137954)", isOptimized: true, emissionKind: FullDebug, file: !16, enums: !2, retainedTypes: !2, globals: !2)
 !1 = !{!2}
 !2 = !{}
-!5 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barN2N11AE", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scope: !6, type: !7)
+!5 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barN2N11AE", file: !16, line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scope: !6, type: !7)
 !6 = !DIFile(filename: "n2.c", directory: "/private/tmp")
 !7 = !DISubroutineType(types: !8)
 !8 = !{null}

test/ThinLTO/X86/crash_debuginfo.ll

@@ -41,6 +41,5 @@ declare void @bar(i32)
 !14 = !DILocalVariable(name: "caster", scope: !9, file: !1, line: 728, type: !15)
 !15 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !9, file: !1, line: 728, size: 64, align: 64, elements: !6, identifier: "someclass")
 !16 = distinct !DILocation(line: 87, column: 9, scope: !17)
-!17 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !10, line: 73, type: !11, isLocal: false, isDefinition: true, scopeLine: 74, flags: DIFlagPrototyped, isOptimized: true, unit: !0, declaration: !18, variables: !6)
+!17 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !10, file: !1, line: 73, type: !11, isLocal: false, isDefinition: true, scopeLine: 74, flags: DIFlagPrototyped, isOptimized: true, unit: !0, declaration: !18, variables: !6)
 !18 = !DISubprogram(name: "foo", linkageName: "foo", scope: !10, file: !1, line: 83, type: !11, isLocal: false, isDefinition: false, scopeLine: 83, flags: DIFlagPrototyped, isOptimized: true)
-

test/Transforms/ArgumentPromotion/dbg.ll

@@ -24,6 +24,6 @@ define void @caller(i32** %Y) {
 
 !0 = !{i32 2, !"Debug Info Version", i32 3}
 !1 = !DILocation(line: 8, scope: !2)
-!2 = distinct !DISubprogram(name: "test", line: 3, isLocal: true, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !3, scopeLine: 3, scope: null)
+!2 = distinct !DISubprogram(name: "test", file: !5, line: 3, isLocal: true, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !3, scopeLine: 3, scope: null)
 !3 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: LineTablesOnly, file: !5)
 !5 = !DIFile(filename: "test.c", directory: "")

test/Transforms/GlobalOpt/2009-03-05-dbg.ll

@@ -77,4 +77,4 @@ attributes #1 = { nounwind readnone }
 !6 = !{i32 2, !"Dwarf Version", i32 2}
 !7 = !{i32 2, !"Debug Info Version", i32 3}
 !8 = !DILocalVariable(name: "i", arg: 1, scope: !9, file: !3, line: 4, type: !5)
-!9 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !2, line: 4, type: !10, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !2)!10 = !DISubroutineType(types: !11)!11 = !{!5, !5}!12 = !DIExpression()!13 = !DILocation(line: 5, scope: !14)!14 = distinct !DILexicalBlock(scope: !9, file: !3)!15 = !DILocation(line: 6, scope: !14)!16 = !DILocation(line: 7, scope: !14)!17 = !DILocation(line: 9, scope: !14)!18 = !DILocation(line: 11, scope: !14)!19 = !DILocation(line: 14, scope: !20)!20 = distinct !DILexicalBlock(scope: !21, file: !3)!21 = distinct !DISubprogram(name: "bar", linkageName: "bar", scope: !2, line: 13, type: !22, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !2)!22 = !DISubroutineType(types: !23)!23 = !{!5}!24 = !DILocation(line: 15, scope: !20)!25 = !DILocation(line: 16, scope: !20)
+!9 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: !2, file: !3, line: 4, type: !10, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !2)!10 = !DISubroutineType(types: !11)!11 = !{!5, !5}!12 = !DIExpression()!13 = !DILocation(line: 5, scope: !14)!14 = distinct !DILexicalBlock(scope: !9, file: !3)!15 = !DILocation(line: 6, scope: !14)!16 = !DILocation(line: 7, scope: !14)!17 = !DILocation(line: 9, scope: !14)!18 = !DILocation(line: 11, scope: !14)!19 = !DILocation(line: 14, scope: !20)!20 = distinct !DILexicalBlock(scope: !21, file: !3)!21 = distinct !DISubprogram(name: "bar", linkageName: "bar", scope: !2, file: !3, line: 13, type: !22, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !2)!22 = !DISubroutineType(types: !23)!23 = !{!5}!24 = !DILocation(line: 15, scope: !20)!25 = !DILocation(line: 16, scope: !20)

test/Transforms/SampleProfile/early-inline.ll

@@ -41,8 +41,8 @@ declare i32 @__gxx_personality_v0(...)
 !1 = !DIFile(filename: "a", directory: "b/")
 !3 = !{i32 2, !"Dwarf Version", i32 4}
 !4 = !{i32 2, !"Debug Info Version", i32 3}
-!6 = distinct !DISubprogram(linkageName: "_Z3foov", scope: !1, line: 5, scopeLine: 5, unit: !0)
+!6 = distinct !DISubprogram(linkageName: "_Z3foov", scope: !1, file: !1, line: 5, scopeLine: 5, unit: !0)
 !9 = !DILocation(line: 6, column: 3, scope: !6)
 !10 = !DILocation(line: 8, column: 5, scope: !11)
 !11 = distinct !DILexicalBlock(scope: !6, file: !1, line: 7, column: 7)
-!12 = distinct !DISubprogram(linkageName: "_ZL3barv", scope: !1, line: 20, scopeLine: 20, unit: !0)
+!12 = distinct !DISubprogram(linkageName: "_ZL3barv", scope: !1, file: !1, line: 20, scopeLine: 20, unit: !0)

test/Verifier/dbg-line-without-file.ll

@@ -0,0 +1,15 @@
+; RUN: not llvm-as -disable-output <%s 2>&1 | FileCheck %s
+; CHECK: assembly parsed, but does not verify
+; CHECK: line specified with no file
+
+define void @foo() !dbg !3 {
+  ret void
+}
+
+!llvm.module.flags = !{!0}
+!llvm.dbg.cu = !{!1}
+
+!0 = !{i32 2, !"Debug Info Version", i32 3}
+!1 = distinct !DICompileUnit(language: DW_LANG_C, file: !2)
+!2 = !DIFile(filename: "foo.c", directory: "")
+!3 = distinct !DISubprogram(name: "foo", scope: !1, line: 1, unit: !1)