Debug info for optimized code: Support variables that are on the stack and

described by DBG_VALUEs during their lifetime.

Previously, when a variable was at a FrameIndex for any part of its
lifetime, this would shadow all other DBG_VALUEs and only a single
fbreg location would be emitted, which in fact is only valid for a small
range and not the entire lexical scope of the variable. The included
dbg-value-const-byref testcase demonstrates this.

This patch fixes this by
Local
- emitting dbg.value intrinsics for allocas that are passed by reference
- dropping all dbg.declares (they are now fully lowered to dbg.values)
SelectionDAG
- renamed constructors for SDDbgValue for better readability.
- fix UserValue::match() to handle indirect values correctly
- not inserting an MMI table entries for dbg.values that describe allocas.
- lowering dbg.values that describe allocas into *indirect* DBG_VALUEs.
CodeGenPrepare
- leaving dbg.values for an alloca were they are (see comment)
Other
- regenerated/updated instcombine-intrinsics testcase and included source

rdar://problem/16679879
http://reviews.llvm.org/D3374

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207130 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index b827c5147a2656405158402c2e6df85bc04946da..a13d104d2382c78689c1ace88cb7477d4c4dfb7e 100644 (file)
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/include/llvm/CodeGen/SelectionDAG.h
@@ -928,12 +928,15 @@ public:
 
   /// getDbgValue - Creates a SDDbgValue node.
   ///
-  SDDbgValue *getDbgValue(MDNode *MDPtr, SDNode *N, unsigned R, uint64_t Off,
-                          DebugLoc DL, unsigned O);
-  SDDbgValue *getDbgValue(MDNode *MDPtr, const Value *C, uint64_t Off,
-                          DebugLoc DL, unsigned O);
-  SDDbgValue *getDbgValue(MDNode *MDPtr, unsigned FI, uint64_t Off,
+  SDDbgValue *getDbgValue(MDNode *MDPtr, SDNode *N, unsigned R,
+                         bool IsIndirect, uint64_t Off,
                           DebugLoc DL, unsigned O);
+  /// Constant.
+  SDDbgValue *getConstantDbgValue(MDNode *MDPtr, const Value *C, uint64_t Off,
+                                 DebugLoc DL, unsigned O);
+  /// Frame index.
+  SDDbgValue *getFrameIndexDbgValue(MDNode *MDPtr, unsigned FI, uint64_t Off,
+                                   DebugLoc DL, unsigned O);
 
   /// RemoveDeadNode - Remove the specified node from the system. If any of its
   /// operands then becomes dead, remove them as well. Inform UpdateListener

diff --git a/lib/CodeGen/CodeGenPrepare.cpp b/lib/CodeGen/CodeGenPrepare.cpp
index 85734f715c9a170359648845b91af64312334219..875615c4c3e3584d4efed44aa8801fd522a24d27 100644 (file)
--- a/lib/CodeGen/CodeGenPrepare.cpp
+++ b/lib/CodeGen/CodeGenPrepare.cpp
@@ -3470,7 +3470,12 @@ bool CodeGenPrepare::PlaceDbgValues(Function &F) {
     for (BasicBlock::iterator BI = I->begin(), BE = I->end(); BI != BE;) {
       Instruction *Insn = BI; ++BI;
       DbgValueInst *DVI = dyn_cast<DbgValueInst>(Insn);
-      if (!DVI) {
+      // Leave dbg.values that refer to an alloca alone. These
+      // instrinsics describe the address of a variable (= the alloca)
+      // being taken.  They should not be moved next to the alloca
+      // (and to the beginning of the scope), but rather stay close to
+      // where said address is used.
+      if (!DVI || (DVI->getValue() && isa<AllocaInst>(DVI->getValue()))) {
         PrevNonDbgInst = Insn;
         continue;
       }

diff --git a/lib/CodeGen/LiveDebugVariables.cpp b/lib/CodeGen/LiveDebugVariables.cpp
index dcd78a27a29924dc4bc35a44583cd00dcc113c14..388f58fde2ab345f4eac90ee0d718f81e23be2ae 100644 (file)
--- a/lib/CodeGen/LiveDebugVariables.cpp
+++ b/lib/CodeGen/LiveDebugVariables.cpp
@@ -157,8 +157,8 @@ public:
   UserValue *getNext() const { return next; }
 
   /// match - Does this UserValue match the parameters?
-  bool match(const MDNode *Var, unsigned Offset) const {
-    return Var == variable && Offset == offset;
+  bool match(const MDNode *Var, unsigned Offset, bool indirect) const {
+    return Var == variable && Offset == offset && indirect == IsIndirect;
   }
 
   /// merge - Merge equivalence classes.
@@ -427,7 +427,7 @@ UserValue *LDVImpl::getUserValue(const MDNode *Var, unsigned Offset,
     UserValue *UV = Leader->getLeader();
     Leader = UV;
     for (; UV; UV = UV->getNext())
-      if (UV->match(Var, Offset))
+      if (UV->match(Var, Offset, IsIndirect))
         return UV;
   }
 

diff --git a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
index c134454e0d03812cccd4627030d05850f577ba83..7c124b8caa91e3b3f4b295ad46ee753b63fe6766 100644 (file)
--- a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
+++ b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
@@ -688,10 +688,13 @@ InstrEmitter::EmitDbgValue(SDDbgValue *SD,
     MIB.addReg(0U);
   }
 
-  if (Offset != 0) // Indirect addressing.
+  // Indirect addressing is indicated by an Imm as the second parameter.
+  if (SD->isIndirect())
     MIB.addImm(Offset);
-  else
+  else {
+    assert(Offset == 0 && "direct value cannot have an offset");
     MIB.addReg(0U, RegState::Debug);
+  }
 
   MIB.addMetadata(MDPtr);
 

diff --git a/lib/CodeGen/SelectionDAG/SDNodeDbgValue.h b/lib/CodeGen/SelectionDAG/SDNodeDbgValue.h
index b62bd623c4247ee91ba13af55c85569475e23c8c..ee54292831121a443fd6c54479a142b5d8c285b3 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SDNodeDbgValue.h
+++ b/lib/CodeGen/SelectionDAG/SDNodeDbgValue.h
@@ -45,14 +45,17 @@ private:
     unsigned FrameIx;       // valid for stack objects
   } u;
   MDNode *mdPtr;
+  bool IsIndirect;
   uint64_t Offset;
   DebugLoc DL;
   unsigned Order;
   bool Invalid;
 public:
   // Constructor for non-constants.
-  SDDbgValue(MDNode *mdP, SDNode *N, unsigned R, uint64_t off, DebugLoc dl,
-             unsigned O) : mdPtr(mdP), Offset(off), DL(dl), Order(O),
+  SDDbgValue(MDNode *mdP, SDNode *N, unsigned R,
+            bool indir, uint64_t off, DebugLoc dl,
+             unsigned O) : mdPtr(mdP), IsIndirect(indir),
+                          Offset(off), DL(dl), Order(O),
                            Invalid(false) {
     kind = SDNODE;
     u.s.Node = N;
@@ -62,14 +65,16 @@ public:
   // Constructor for constants.
   SDDbgValue(MDNode *mdP, const Value *C, uint64_t off, DebugLoc dl,
              unsigned O) : 
-    mdPtr(mdP), Offset(off), DL(dl), Order(O), Invalid(false) {
+    mdPtr(mdP), IsIndirect(false), Offset(off), DL(dl), Order(O),
+    Invalid(false) {
     kind = CONST;
     u.Const = C;
   }
 
   // Constructor for frame indices.
   SDDbgValue(MDNode *mdP, unsigned FI, uint64_t off, DebugLoc dl, unsigned O) : 
-    mdPtr(mdP), Offset(off), DL(dl), Order(O), Invalid(false) {
+    mdPtr(mdP), IsIndirect(false), Offset(off), DL(dl), Order(O),
+    Invalid(false) {
     kind = FRAMEIX;
     u.FrameIx = FI;
   }
@@ -92,6 +97,9 @@ public:
   // Returns the FrameIx for a stack object
   unsigned getFrameIx() { assert (kind==FRAMEIX); return u.FrameIx; }
 
+  // Returns whether this is an indirect value.
+  bool isIndirect() { return IsIndirect; }
+
   // Returns the offset.
   uint64_t getOffset() { return Offset; }
 

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index f3974461da53ae53a7509d3e079cf7fec7ed6a72..6ebedfc67af223813a9648f1fe2471e0ed791bd3 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -5646,21 +5646,26 @@ SDNode *SelectionDAG::getNodeIfExists(unsigned Opcode, SDVTList VTList,
 
 /// getDbgValue - Creates a SDDbgValue node.
 ///
+/// SDNode
 SDDbgValue *
-SelectionDAG::getDbgValue(MDNode *MDPtr, SDNode *N, unsigned R, uint64_t Off,
+SelectionDAG::getDbgValue(MDNode *MDPtr, SDNode *N, unsigned R,
+                         bool IsIndirect, uint64_t Off,
                           DebugLoc DL, unsigned O) {
-  return new (Allocator) SDDbgValue(MDPtr, N, R, Off, DL, O);
+  return new (Allocator) SDDbgValue(MDPtr, N, R, IsIndirect, Off, DL, O);
 }
 
+/// Constant
 SDDbgValue *
-SelectionDAG::getDbgValue(MDNode *MDPtr, const Value *C, uint64_t Off,
-                          DebugLoc DL, unsigned O) {
+SelectionDAG::getConstantDbgValue(MDNode *MDPtr, const Value *C,
+                                 uint64_t Off,
+                                 DebugLoc DL, unsigned O) {
   return new (Allocator) SDDbgValue(MDPtr, C, Off, DL, O);
 }
 
+/// FrameIndex
 SDDbgValue *
-SelectionDAG::getDbgValue(MDNode *MDPtr, unsigned FI, uint64_t Off,
-                          DebugLoc DL, unsigned O) {
+SelectionDAG::getFrameIndexDbgValue(MDNode *MDPtr, unsigned FI, uint64_t Off,
+                                   DebugLoc DL, unsigned O) {
   return new (Allocator) SDDbgValue(MDPtr, FI, Off, DL, O);
 }
 
@@ -6066,6 +6071,7 @@ void SelectionDAG::TransferDbgValues(SDValue From, SDValue To) {
     SDDbgValue *Dbg = *I;
     if (Dbg->getKind() == SDDbgValue::SDNODE) {
       SDDbgValue *Clone = getDbgValue(Dbg->getMDPtr(), ToNode, To.getResNo(),
+                                     Dbg->isIndirect(),
                                       Dbg->getOffset(), Dbg->getDebugLoc(),
                                       Dbg->getOrder());
       ClonedDVs.push_back(Clone);

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index f20d07a4c7d3b4a823352632b51c4c275c73ab5b..3b95640392531e2fd3ee413f7f50217c4baf79fd 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -992,11 +992,14 @@ void SelectionDAGBuilder::resolveDanglingDebugInfo(const Value *V,
     unsigned DbgSDNodeOrder = DDI.getSDNodeOrder();
     MDNode *Variable = DI->getVariable();
     uint64_t Offset = DI->getOffset();
+    // FIXME: This does not handle indirect values at offset 0.
+    bool IsIndirect = (Offset != 0);
     SDDbgValue *SDV;
     if (Val.getNode()) {
       if (!EmitFuncArgumentDbgValue(V, Variable, Offset, Val)) {
         SDV = DAG.getDbgValue(Variable, Val.getNode(),
-                              Val.getResNo(), Offset, dl, DbgSDNodeOrder);
+                              Val.getResNo(), IsIndirect,
+                             Offset, dl, DbgSDNodeOrder);
         DAG.AddDbgValue(SDV, Val.getNode(), false);
       }
     } else
@@ -4744,8 +4747,8 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
         FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(N.getNode());
         if (FINode)
           // Byval parameter.  We have a frame index at this point.
-          SDV = DAG.getDbgValue(Variable, FINode->getIndex(),
-                                0, dl, SDNodeOrder);
+          SDV = DAG.getFrameIndexDbgValue(Variable, FINode->getIndex(),
+                                         0, dl, SDNodeOrder);
         else {
           // Address is an argument, so try to emit its dbg value using
           // virtual register info from the FuncInfo.ValueMap.
@@ -4754,7 +4757,7 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
         }
       } else if (AI)
         SDV = DAG.getDbgValue(Variable, N.getNode(), N.getResNo(),
-                              0, dl, SDNodeOrder);
+                              true, 0, dl, SDNodeOrder);
       else {
         // Can't do anything with other non-AI cases yet.
         DEBUG(dbgs() << "Dropping debug info for " << DI << "\n");
@@ -4774,8 +4777,8 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
             DenseMap<const AllocaInst*, int>::iterator SI =
               FuncInfo.StaticAllocaMap.find(AI);
             if (SI != FuncInfo.StaticAllocaMap.end()) {
-              SDV = DAG.getDbgValue(Variable, SI->second,
-                                    0, dl, SDNodeOrder);
+              SDV = DAG.getFrameIndexDbgValue(Variable, SI->second,
+                                              0, dl, SDNodeOrder);
               DAG.AddDbgValue(SDV, nullptr, false);
               return nullptr;
             }
@@ -4802,7 +4805,7 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
 
     SDDbgValue *SDV;
     if (isa<ConstantInt>(V) || isa<ConstantFP>(V) || isa<UndefValue>(V)) {
-      SDV = DAG.getDbgValue(Variable, V, Offset, dl, SDNodeOrder);
+      SDV = DAG.getConstantDbgValue(Variable, V, Offset, dl, SDNodeOrder);
       DAG.AddDbgValue(SDV, nullptr, false);
     } else {
       // Do not use getValue() in here; we don't want to generate code at
@@ -4813,8 +4816,11 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
         N = UnusedArgNodeMap[V];
       if (N.getNode()) {
         if (!EmitFuncArgumentDbgValue(V, Variable, Offset, N)) {
+         // A dbg.value for an alloca is always indirect.
+         bool IsIndirect(isa<AllocaInst>(V));
           SDV = DAG.getDbgValue(Variable, N.getNode(),
-                                N.getResNo(), Offset, dl, SDNodeOrder);
+                                N.getResNo(), IsIndirect,
+                               Offset, dl, SDNodeOrder);
           DAG.AddDbgValue(SDV, N.getNode(), false);
         }
       } else if (!V->use_empty() ) {
@@ -4843,11 +4849,6 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
       FuncInfo.StaticAllocaMap.find(AI);
     if (SI == FuncInfo.StaticAllocaMap.end())
       return nullptr; // VLAs.
-    int FI = SI->second;
-
-    MachineModuleInfo &MMI = DAG.getMachineFunction().getMMI();
-    if (!DI.getDebugLoc().isUnknown() && MMI.hasDebugInfo())
-      MMI.setVariableDbgInfo(Variable, FI, DI.getDebugLoc());
     return nullptr;
   }
 

diff --git a/lib/Transforms/Utils/Local.cpp b/lib/Transforms/Utils/Local.cpp
index abd73eb5c9739abec8ddfbb0df7bfddae598ca28..e2ba0473fd15a161cc89d1c7976ab9c56160a65b 100644 (file)
--- a/lib/Transforms/Utils/Local.cpp
+++ b/lib/Transforms/Utils/Local.cpp
@@ -1051,20 +1051,26 @@ bool llvm::LowerDbgDeclare(Function &F) {
     AllocaInst *AI = dyn_cast_or_null<AllocaInst>(DDI->getAddress());
     // If this is an alloca for a scalar variable, insert a dbg.value
     // at each load and store to the alloca and erase the dbg.declare.
+    // The dbg.values allow tracking a variable even if it is not
+    // stored on the stack, while the dbg.declare can only describe
+    // the stack slot (and at a lexical-scope granularity). Later
+    // passes will attempt to elide the stack slot.
     if (AI && !AI->isArrayAllocation()) {
-
-      // We only remove the dbg.declare intrinsic if all uses are
-      // converted to dbg.value intrinsics.
-      bool RemoveDDI = true;
       for (User *U : AI->users())
         if (StoreInst *SI = dyn_cast<StoreInst>(U))
           ConvertDebugDeclareToDebugValue(DDI, SI, DIB);
         else if (LoadInst *LI = dyn_cast<LoadInst>(U))
           ConvertDebugDeclareToDebugValue(DDI, LI, DIB);
-        else
-          RemoveDDI = false;
-      if (RemoveDDI)
-        DDI->eraseFromParent();
+        else if (Instruction *I = dyn_cast<Instruction>(U)) {
+         // This is a call by-value or some other instruction that
+         // takes a pointer to the variable. Insert a *value*
+         // intrinsic that describes the alloca.
+         auto DbgVal =
+           DIB.insertDbgValueIntrinsic(AI, 0,
+                                       DIVariable(DDI->getVariable()), I);
+         DbgVal->setDebugLoc(I->getDebugLoc());
+       }
+      DDI->eraseFromParent();
     }
   }
   return true;

diff --git a/test/DebugInfo/X86/dbg-value-const-byref.ll b/test/DebugInfo/X86/dbg-value-const-byref.ll
index 2f808786a8c6b00a831b170131c03446d12944e7..baba0cdb315a066a158aef003b1f1a7efd880399 100644 (file)
--- a/test/DebugInfo/X86/dbg-value-const-byref.ll
+++ b/test/DebugInfo/X86/dbg-value-const-byref.ll
@@ -37,6 +37,10 @@
 ; CHECK: Beginning address offset: [[C2]]
 ; CHECK:    Ending address offset: [[R1:.*]]
 ; CHECK:     Location description: 50 93 04
+;         rdi+0
+; CHECK: Beginning address offset: [[R1]]
+; CHECK:    Ending address offset: [[R2:.*]]
+; CHECK:     Location description: 75 00
 ;
 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-apple-macosx10.9.0"
@@ -51,6 +55,7 @@ entry:
   %call1 = call i32 (...)* @f1() #3, !dbg !19
   call void @llvm.dbg.value(metadata !{i32 %call1}, i64 0, metadata !10), !dbg !19
   store i32 %call1, i32* %i, align 4, !dbg !19, !tbaa !20
+  call void @llvm.dbg.value(metadata !{i32* %i}, i64 0, metadata !10), !dbg !24
   call void @f2(i32* %i) #3, !dbg !24
   ret i32 0, !dbg !25
 }

diff --git a/test/DebugInfo/X86/instcombine-instrinsics.ll b/test/DebugInfo/X86/instcombine-instrinsics.ll
index 41dd09f5a42598d4c0dda2301660d723acf0aa3b..2fd7ee319c2ee476614c6f26e13f5673211480dc 100644 (file)
--- a/test/DebugInfo/X86/instcombine-instrinsics.ll
+++ b/test/DebugInfo/X86/instcombine-instrinsics.ll
@@ -1,102 +1,79 @@
-; RUN: opt < %s -O2 -S | FileCheck %s
+; RUN: opt %s -O2 -S -o - | FileCheck %s
 ; Verify that we emit the same intrinsic at most once.
-; CHECK: call void @llvm.dbg.value(metadata !{%struct.i14** %i14}
-; CHECK-NOT: call void @llvm.dbg.value(metadata !{%struct.i14** %i14}
+; rdar://problem/13056109
+;
+; CHECK: call void @llvm.dbg.value(metadata !{%struct.i14** %p}
+; CHECK-NOT: call void @llvm.dbg.value(metadata !{%struct.i14** %p}
+; CHECK-NEXT: call i32 @foo
 ; CHECK: ret
+;
+;
+; typedef struct {
+;   long i;
+; } i14;
+;
+; int foo(i14**);
+;
+;   void init() {
+;     i14* p = 0;
+;     foo(&p);
+;     p->i |= 4;
+;     foo(&p);
+;   }
+;
+; ModuleID = 'instcombine_intrinsics.c'
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.9.0"
 
-;*** IR Dump After Dead Argument Elimination ***
-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-apple-macosx10.8.0"
+%struct.i14 = type { i64 }
 
-%struct.i3 = type { i32 }
-%struct.i14 = type { i32 }
-%struct.i24 = type opaque
-
-define %struct.i3* @barz(i64 %i9) nounwind {
-entry:
-  br label %while.cond
-
-while.cond:                                       ; preds = %while.body, %entry
-  br label %while.body
-
-while.body:                                       ; preds = %while.cond
-  br label %while.cond
-}
-
-declare void @llvm.dbg.declare(metadata, metadata)
-
-define void @init() nounwind {
-entry:
-  %i14 = alloca %struct.i14*, align 8
-  call void @llvm.dbg.declare(metadata !{%struct.i14** %i14}, metadata !25)
-  store %struct.i14* null, %struct.i14** %i14, align 8
-  %call = call i32 @foo(i8* bitcast (void ()* @bar to i8*), %struct.i14** %i14)
-  %0 = load %struct.i14** %i14, align 8
-  %i16 = getelementptr inbounds %struct.i14* %0, i32 0, i32 0
-  %1 = load i32* %i16, align 4
-  %or = or i32 %1, 4
-  store i32 %or, i32* %i16, align 4
-  %call4 = call i32 @foo(i8* bitcast (void ()* @baz to i8*), %struct.i14** %i14)
-  ret void
+; Function Attrs: nounwind ssp uwtable
+define void @init() #0 {
+  %p = alloca %struct.i14*, align 8
+  call void @llvm.dbg.declare(metadata !{%struct.i14** %p}, metadata !11), !dbg !18
+  store %struct.i14* null, %struct.i14** %p, align 8, !dbg !18
+  %1 = call i32 @foo(%struct.i14** %p), !dbg !19
+  %2 = load %struct.i14** %p, align 8, !dbg !20
+  %3 = getelementptr inbounds %struct.i14* %2, i32 0, i32 0, !dbg !20
+  %4 = load i64* %3, align 8, !dbg !20
+  %5 = or i64 %4, 4, !dbg !20
+  store i64 %5, i64* %3, align 8, !dbg !20
+  %6 = call i32 @foo(%struct.i14** %p), !dbg !21
+  ret void, !dbg !22
 }
 
-declare i32 @foo(i8*, %struct.i14**) nounwind
-
-define internal void @bar() nounwind {
-entry:
-  %i9 = alloca i64, align 8
-  store i64 0, i64* %i9, align 8
-  %call = call i32 @put(i64 0, i64* %i9, i64 0, %struct.i24* null)
-  ret void
-}
-
-define internal void @baz() nounwind {
-entry:
-  ret void
-}
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata) #1
 
-declare i32 @put(i64, i64*, i64, %struct.i24*) nounwind readnone
+declare i32 @foo(%struct.i14**)
 
-declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
+attributes #0 = { nounwind ssp uwtable }
+attributes #1 = { nounwind readnone }
 
 !llvm.dbg.cu = !{!0}
-!llvm.module.flags = !{!73}
+!llvm.module.flags = !{!8, !9}
+!llvm.ident = !{!10}
 
-!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.3 ", i1 true, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !48, null, metadata !""} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{metadata !"i1", metadata !""}
-!2 = metadata !{i32 0}
-!3 = metadata !{metadata !4, metadata !21, metadata !33, metadata !47}
-!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"i2", metadata !"i2", metadata !"", i32 31, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, %struct.i3* (i64)* @barz, null, null, metadata !16, i32 32} ; [ DW_TAG_subprogram ] [line 31]  [scope 32]
-!5 = metadata !{i32 786473, metadata !1}          ; [ DW_TAG_file_type ]
+!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.5.0 ", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [instcombine_intrinsics.c] [DW_LANG_C99]
+!1 = metadata !{metadata !"instcombine_intrinsics.c", metadata !""}
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