Debug Info Finder: use processDeclare and processValue to list debug info

MDNodes used by DbgDeclareInst and DbgValueInst.

Another 16 testing cases failed and they are disabled with
-disable-debug-info-verifier.
A total of 34 cases are disabled with -disable-debug-info-verifier and will be
corrected.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186902 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/DebugInfo.h

@@ -31,6 +31,7 @@ namespace llvm {
   class Type;
   class Value;
   class DbgDeclareInst;
+  class DbgValueInst;
   class Instruction;
   class MDNode;
   class NamedMDNode;
@@ -734,12 +735,23 @@ namespace llvm {
   /// cleanseInlinedVariable - Remove inlined scope from the variable.
   DIVariable cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext);
 
+  /// DebugInfoFinder tries to list all debug info MDNodes in a module. To
+  /// list debug info MDNodes used by an instruction, DebugInfoFinder uses
+  /// processDeclare and processValue. processModule will go through
+  /// all DICompileUnits and list debug info MDNodes used by the CUs.
   class DebugInfoFinder {
   public:
     /// processModule - Process entire module and collect debug info
     /// anchors.
     void processModule(const Module &M);
 
+    /// processDeclare - Process DbgDeclareInst.
+    void processDeclare(const DbgDeclareInst *DDI);
+    /// Process DbgValueInst.
+    void processValue(const DbgValueInst *DVI);
+
+    /// Clear all lists.
+    void reset();
   private:
     /// processType - Process DIType.
     void processType(DIType DT);
@@ -750,9 +762,6 @@ namespace llvm {
     /// processSubprogram - Process DISubprogram.
     void processSubprogram(DISubprogram SP);
 
-    /// processDeclare - Process DbgDeclareInst.
-    void processDeclare(const DbgDeclareInst *DDI);
-
     /// processLocation - Process DILocation.
     void processLocation(DILocation Loc);
 

lib/IR/DebugInfo.cpp

@@ -847,6 +847,15 @@ bool llvm::isSubprogramContext(const MDNode *Context) {
 // DebugInfoFinder implementations.
 //===----------------------------------------------------------------------===//
 
+void DebugInfoFinder::reset() {
+  CUs.clear();
+  SPs.clear();
+  GVs.clear();
+  TYs.clear();
+  Scopes.clear();
+  NodesSeen.clear();
+}
+
 /// processModule - Process entire module and collect debug info.
 void DebugInfoFinder::processModule(const Module &M) {
   if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
@@ -970,6 +979,19 @@ void DebugInfoFinder::processDeclare(const DbgDeclareInst *DDI) {
   processType(DIVariable(N).getType());
 }
 
+void DebugInfoFinder::processValue(const DbgValueInst *DVI) {
+  MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
+  if (!N) return;
+
+  DIDescriptor DV(N);
+  if (!DV.isVariable())
+    return;
+
+  if (!NodesSeen.insert(DV))
+    return;
+  processType(DIVariable(N).getType());
+}
+
 /// addType - Add type into Tys.
 bool DebugInfoFinder::addType(DIType DT) {
   if (!DT.isValid())

lib/IR/Verifier.cpp

@@ -147,6 +147,9 @@ namespace {
     /// the same personality function.
     const Value *PersonalityFn;
 
+    /// Finder keeps track of all debug info MDNodes in a Module.
+    DebugInfoFinder Finder;
+
     Verifier()
       : FunctionPass(ID), Broken(false),
         action(AbortProcessAction), Mod(0), Context(0), DT(0),
@@ -162,6 +165,7 @@ namespace {
     bool doInitialization(Module &M) {
       Mod = &M;
       Context = &M.getContext();
+      Finder.reset();
 
       // We must abort before returning back to the pass manager, or else the
       // pass manager may try to run other passes on the broken module.
@@ -2144,7 +2148,17 @@ void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
     MDNode *MD = cast<MDNode>(CI.getArgOperand(0));
     Assert1(MD->getNumOperands() == 1,
                 "invalid llvm.dbg.declare intrinsic call 2", &CI);
+    if (!DisableDebugInfoVerifier)
+      Finder.processDeclare(cast<DbgDeclareInst>(&CI));
   } break;
+  case Intrinsic::dbg_value: { //llvm.dbg.value
+    if (!DisableDebugInfoVerifier) {
+      Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
+              "invalid llvm.dbg.value intrinsic call 1", &CI);
+      Finder.processValue(cast<DbgValueInst>(&CI));
+    }
+    break;
+  }
   case Intrinsic::memcpy:
   case Intrinsic::memmove:
   case Intrinsic::memset:
@@ -2209,7 +2223,6 @@ void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
 void Verifier::verifyDebugInfo(Module &M) {
   // Verify Debug Info.
   if (!DisableDebugInfoVerifier) {
-    DebugInfoFinder Finder;
     Finder.processModule(M);
 
     for (DebugInfoFinder::iterator I = Finder.compile_unit_begin(),

test/Assembler/functionlocal-metadata.ll

@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | llvm-dis | FileCheck %s
+; RUN: llvm-as -disable-debug-info-verifier < %s | llvm-dis | FileCheck %s
 
 define void @Foo(i32 %a, i32 %b) {
 entry:

test/CodeGen/ARM/2010-04-15-ScavengerDebugValue.ll

@@ -1,4 +1,4 @@
-; RUN: llc < %s
+; RUN: llc -disable-debug-info-verifier < %s
 ; PR6847
 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:64-n32"
 target triple = "armv4t-apple-darwin10"

test/CodeGen/ARM/debug-info-blocks.ll

@@ -1,4 +1,4 @@
-; RUN: llc -O0 < %s | FileCheck %s
+; RUN: llc -O0 -disable-debug-info-verifier < %s | FileCheck %s
 ; CHECK: @DEBUG_VALUE: mydata <- [SP+{{[0-9]+}}]
 ; Radar 9331779
 target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:64-v128:32:128-a0:0:32-n32"

test/CodeGen/X86/2010-02-01-DbgValueCrash.ll

@@ -1,4 +1,4 @@
-; RUN: llc -O1 < %s
+; RUN: llc -O1 -disable-debug-info-verifier < %s
 ; ModuleID = 'pr6157.bc'
 ; formerly crashed in SelectionDAGBuilder
 

test/CodeGen/X86/2010-06-01-DeadArg-DbgInfo.ll

@@ -1,5 +1,5 @@
-; RUN: llc -O2 < %s | FileCheck %s
+; RUN: llc -O2 -disable-debug-info-verifier < %s | FileCheck %s
-; RUN: llc -O2 -regalloc=basic < %s | FileCheck %s
+; RUN: llc -O2 -regalloc=basic -disable-debug-info-verifier < %s | FileCheck %s
 ; Test to check that unused argument 'this' is not undefined in debug info.
 
 target triple = "x86_64-apple-darwin10.2"

test/CodeGen/X86/2010-11-02-DbgParameter.ll

@@ -1,4 +1,4 @@
-; RUN: llc -O2 -asm-verbose < %s | FileCheck %s
+; RUN: llc -O2 -disable-debug-info-verifier -asm-verbose < %s | FileCheck %s
 ; Radar 8616981
 
 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"

test/CodeGen/X86/dbg-declare-arg.ll

@@ -1,4 +1,4 @@
-; RUN: llc -O0 -fast-isel=false < %s | FileCheck %s
+; RUN: llc -O0 -fast-isel=false -disable-debug-info-verifier < %s | FileCheck %s
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
 target triple = "x86_64-apple-macosx10.6.7"
 ;Radar 9321650

test/DebugInfo/2010-03-30-InvalidDbgInfoCrash.ll

@@ -1,4 +1,4 @@
-; RUN: llc < %s -o /dev/null
+; RUN: llc -disable-debug-info-verifier < %s -o /dev/null
 
 define void @baz(i32 %i) nounwind ssp {
 entry:

test/DebugInfo/2010-05-03-DisableFramePtr.ll

@@ -1,4 +1,4 @@
-; RUN: llc  -o /dev/null -disable-non-leaf-fp-elim < %s
+; RUN: llc  -disable-debug-info-verifier -o /dev/null -disable-non-leaf-fp-elim < %s
 ; Radar 7937664
 %struct.AppleEvent = type opaque
 

test/DebugInfo/2010-05-03-OriginDIE.ll

@@ -1,5 +1,5 @@
 
-;RUN: llc < %s -o /dev/null
+;RUN: llc -disable-debug-info-verifier < %s -o /dev/null
 ;Radar 7937109
 
 %struct.anon = type { i64, i32, i32, i32, [1 x i32] }

test/DebugInfo/2010-10-01-crash.ll

@@ -1,4 +1,4 @@
-; RUN: llc -O0 %s -o /dev/null
+; RUN: llc -O0 -disable-debug-info-verifier %s -o /dev/null
 ; XFAIL: hexagon
 ; PR 8235
 

test/DebugInfo/X86/earlydup-crash.ll

@@ -1,4 +1,4 @@
-; RUN: llc %s -mtriple=i386-apple-macosx10.6.7 -o /dev/null
+; RUN: llc -disable-debug-info-verifier %s -mtriple=i386-apple-macosx10.6.7 -o /dev/null
 
 ; This used to crash because early dup was not ignoring debug instructions.
 

test/DebugInfo/X86/pr12831.ll

@@ -1,4 +1,4 @@
-; RUN: llc %s -mtriple=x86_64-unknown-linux-gnu -o /dev/null
+; RUN: llc -disable-debug-info-verifier %s -mtriple=x86_64-unknown-linux-gnu -o /dev/null
 
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"

test/DebugInfo/inheritance.ll

@@ -1,4 +1,4 @@
-; RUN: llc %s -o /dev/null
+; RUN: llc -disable-debug-info-verifier %s -o /dev/null
 ; PR 2613.
 
 %struct.__class_type_info_pseudo = type { %struct.__type_info_pseudo }

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

@@ -1,4 +1,4 @@
-; RUN: llvm-link %s %p/2011-08-18-unique-class-type2.ll -S -o - | FileCheck %s
+; RUN: llvm-link -disable-debug-info-verifier %s %p/2011-08-18-unique-class-type2.ll -S -o - | FileCheck %s
 ; CHECK: DW_TAG_class_type
 ; CHECK-NOT: DW_TAG_class_type
 ; Test to check there is only one MDNode for class A after linking.

test/Transforms/LoopRotate/dbgvalue.ll

@@ -1,4 +1,4 @@
-; RUN: opt -S -loop-rotate < %s | FileCheck %s
+; RUN: opt -S -loop-rotate -disable-debug-info-verifier < %s | FileCheck %s
 
 declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
 declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone