From 706b4fc47bbc608932d3b491ae19a3b9cde9497b Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Fri, 17 Jan 2020 20:45:01 +0000
Subject: Vendor import of llvm-project master e26a78e70, the last commit
 before the llvmorg-11-init tag, from which release/10.x was branched.

---
 llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp | 32 +++++++++++++++++++--------
 1 file changed, 23 insertions(+), 9 deletions(-)

(limited to 'llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp')

diff --git a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
index c6457f3626d1..62ad356e7f8f 100644
--- a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
@@ -1100,14 +1100,8 @@ void CodeViewDebug::emitDebugInfoForFunction(const Function *GV,
     }
 
     for (auto HeapAllocSite : FI.HeapAllocSites) {
-      MCSymbol *BeginLabel = std::get<0>(HeapAllocSite);
-      MCSymbol *EndLabel = std::get<1>(HeapAllocSite);
-
-      // The labels might not be defined if the instruction was replaced
-      // somewhere in the codegen pipeline.
-      if (!BeginLabel->isDefined() || !EndLabel->isDefined())
-        continue;
-
+      const MCSymbol *BeginLabel = std::get<0>(HeapAllocSite);
+      const MCSymbol *EndLabel = std::get<1>(HeapAllocSite);
       const DIType *DITy = std::get<2>(HeapAllocSite);
       MCSymbol *HeapAllocEnd = beginSymbolRecord(SymbolKind::S_HEAPALLOCSITE);
       OS.AddComment("Call site offset");
@@ -1427,6 +1421,16 @@ void CodeViewDebug::beginFunctionImpl(const MachineFunction *MF) {
     DebugLoc FnStartDL = PrologEndLoc.getFnDebugLoc();
     maybeRecordLocation(FnStartDL, MF);
   }
+
+  // Find heap alloc sites and emit labels around them.
+  for (const auto &MBB : *MF) {
+    for (const auto &MI : MBB) {
+      if (MI.getHeapAllocMarker()) {
+        requestLabelBeforeInsn(&MI);
+        requestLabelAfterInsn(&MI);
+      }
+    }
+  }
 }
 
 static bool shouldEmitUdt(const DIType *T) {
@@ -2850,8 +2854,18 @@ void CodeViewDebug::endFunctionImpl(const MachineFunction *MF) {
     return;
   }
 
+  // Find heap alloc sites and add to list.
+  for (const auto &MBB : *MF) {
+    for (const auto &MI : MBB) {
+      if (MDNode *MD = MI.getHeapAllocMarker()) {
+        CurFn->HeapAllocSites.push_back(std::make_tuple(getLabelBeforeInsn(&MI),
+                                                        getLabelAfterInsn(&MI),
+                                                        dyn_cast<DIType>(MD)));
+      }
+    }
+  }
+
   CurFn->Annotations = MF->getCodeViewAnnotations();
-  CurFn->HeapAllocSites = MF->getCodeViewHeapAllocSites();
 
   CurFn->End = Asm->getFunctionEnd();
 
-- 
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