Author: sammccall
Date: Thu Sep  6 07:27:40 2018
New Revision: 341549

URL: http://llvm.org/viewvc/llvm-project?rev=341549&view=rev
Log:
Revert "[DebugInfo] Generate debug information for labels. (Fix PR37395)"

This reverts commit r341519, which generates debug info that causes
backend crashes. (with -split-dwarf-file)

Details in https://reviews.llvm.org/D50495

Removed:
    cfe/trunk/test/CodeGen/debug-label-inline.c
    cfe/trunk/test/CodeGen/debug-label.c
Modified:
    cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
    cfe/trunk/lib/CodeGen/CGDebugInfo.h
    cfe/trunk/lib/CodeGen/CGStmt.cpp

Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.cpp?rev=341549&r1=341548&r2=341549&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGDebugInfo.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDebugInfo.cpp Thu Sep  6 07:27:40 2018
@@ -3769,32 +3769,6 @@ CGDebugInfo::EmitDeclareOfAutoVariable(c
   return EmitDeclare(VD, Storage, llvm::None, Builder);
 }
 
-void CGDebugInfo::EmitLabel(const LabelDecl *D, CGBuilderTy &Builder) {
-  assert(DebugKind >= codegenoptions::LimitedDebugInfo);
-  assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
-
-  if (D->hasAttr<NoDebugAttr>())
-    return;
-
-  auto *Scope = cast<llvm::DIScope>(LexicalBlockStack.back());
-  llvm::DIFile *Unit = getOrCreateFile(D->getLocation());
-
-  // Get location information.
-  unsigned Line = getLineNumber(D->getLocation());
-  unsigned Column = getColumnNumber(D->getLocation());
-
-  StringRef Name = D->getName();
-
-  // Create the descriptor for the label.
-  auto *L =
-      DBuilder.createLabel(Scope, Name, Unit, Line, 
CGM.getLangOpts().Optimize);
-
-  // Insert an llvm.dbg.label into the current block.
-  DBuilder.insertLabel(L,
-                       llvm::DebugLoc::get(Line, Column, Scope, CurInlinedAt),
-                       Builder.GetInsertBlock());
-}
-
 llvm::DIType *CGDebugInfo::CreateSelfType(const QualType &QualTy,
                                           llvm::DIType *Ty) {
   llvm::DIType *CachedTy = getTypeOrNull(QualTy);

Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.h
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.h?rev=341549&r1=341548&r2=341549&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGDebugInfo.h (original)
+++ cfe/trunk/lib/CodeGen/CGDebugInfo.h Thu Sep  6 07:27:40 2018
@@ -415,9 +415,6 @@ public:
                                                    llvm::Value *AI,
                                                    CGBuilderTy &Builder);
 
-  /// Emit call to \c llvm.dbg.label for an label.
-  void EmitLabel(const LabelDecl *D, CGBuilderTy &Builder);
-
   /// Emit call to \c llvm.dbg.declare for an imported variable
   /// declaration in a block.
   void EmitDeclareOfBlockDeclRefVariable(

Modified: cfe/trunk/lib/CodeGen/CGStmt.cpp
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGStmt.cpp?rev=341549&r1=341548&r2=341549&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGStmt.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGStmt.cpp Thu Sep  6 07:27:40 2018
@@ -531,16 +531,6 @@ void CodeGenFunction::EmitLabel(const La
   }
 
   EmitBlock(Dest.getBlock());
-
-  // Emit debug info for labels.
-  if (CGDebugInfo *DI = getDebugInfo()) {
-    if (CGM.getCodeGenOpts().getDebugInfo() >=
-        codegenoptions::LimitedDebugInfo) {
-      DI->setLocation(D->getLocation());
-      DI->EmitLabel(D, Builder);
-    }
-  }
-
   incrementProfileCounter(D->getStmt());
 }
 

Removed: cfe/trunk/test/CodeGen/debug-label-inline.c
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/debug-label-inline.c?rev=341548&view=auto
==============================================================================
--- cfe/trunk/test/CodeGen/debug-label-inline.c (original)
+++ cfe/trunk/test/CodeGen/debug-label-inline.c (removed)
@@ -1,28 +0,0 @@
-// This test will test the correctness of generating DILabel and
-// llvm.dbg.label when the label is in inlined functions.
-//
-// RUN: %clang_cc1 -O2 %s -o - -emit-llvm -debug-info-kind=limited | FileCheck 
%s
-inline int f1(int a, int b) {
-  int sum;
-
-top:
-  sum = a + b;
-  return sum;
-}
-
-extern int ga, gb;
-
-int f2(void) {
-  int result;
-
-  result = f1(ga, gb);
-  // CHECK: call void @llvm.dbg.label(metadata [[LABEL_METADATA:!.*]]), !dbg 
[[LABEL_LOCATION:!.*]]
-
-  return result;
-}
-
-// CHECK: distinct !DISubprogram(name: "f1", {{.*}}, retainedNodes: 
[[ELEMENTS:!.*]])
-// CHECK: [[ELEMENTS]] = !{{{.*}}, [[LABEL_METADATA]]}
-// CHECK: [[LABEL_METADATA]] = !DILabel({{.*}}, name: "top", {{.*}}, line: 8)
-// CHECK: [[INLINEDAT:!.*]] = distinct !DILocation(line: 18,
-// CHECK: [[LABEL_LOCATION]] = !DILocation(line: 8, {{.*}}, inlinedAt: 
[[INLINEDAT]])

Removed: cfe/trunk/test/CodeGen/debug-label.c
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/debug-label.c?rev=341548&view=auto
==============================================================================
--- cfe/trunk/test/CodeGen/debug-label.c (original)
+++ cfe/trunk/test/CodeGen/debug-label.c (removed)
@@ -1,16 +0,0 @@
-// This test will test the correstness of generating DILabel and
-// llvm.dbg.label for labels.
-//
-// RUN: %clang_cc1 -emit-llvm %s -o - -emit-llvm -debug-info-kind=limited | 
FileCheck %s
-
-int f1(int a, int b) {
-  int sum;
-
-top:
-  // CHECK: call void @llvm.dbg.label(metadata [[LABEL_METADATA:!.*]]), !dbg 
[[LABEL_LOCATION:!.*]]
-  sum = a + b;
-  return sum;
-}
-
-// CHECK: [[LABEL_METADATA]] = !DILabel({{.*}}, name: "top", {{.*}}, line: 9)
-// CHECK: [[LABEL_LOCATION]] = !DILocation(line: 9,


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