From 0e29eeec278d80048de6cf6605e004bbdefaf38c Mon Sep 17 00:00:00 2001
From: Manman Ren <manman.ren@gmail.com>
Date: Tue, 23 Jul 2013 00:22:51 +0000
Subject: 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
---
 lib/IR/DebugInfo.cpp | 22 ++++++++++++++++++++++
 lib/IR/Verifier.cpp  | 15 ++++++++++++++-
 2 files changed, 36 insertions(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/IR/DebugInfo.cpp b/lib/IR/DebugInfo.cpp
index f63fa1a22d..9d88ce0e50 100644
--- a/lib/IR/DebugInfo.cpp
+++ b/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())
diff --git a/lib/IR/Verifier.cpp b/lib/IR/Verifier.cpp
index fa53a4ee69..b22d211772 100644
--- a/lib/IR/Verifier.cpp
+++ b/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(),
-- 
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