Revert "Reland "[DebugInfo] Enable the debug entry values feature by default""

This reverts commit rGfaff707db82d.
A failure found on an ARM 2-stage buildbot.
The investigation is needed.

7 files changed, 10 insertions, 35 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index f7467c3..4e53edf 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -95,10 +95,6 @@ static cl::opt<bool> UseDwarfRangesBaseAddressSpecifier(
     "use-dwarf-ranges-base-address-specifier", cl::Hidden,
     cl::desc("Use base address specifiers in debug_ranges"), cl::init(false));
 
-static cl::opt<bool> EmitDwarfDebugEntryValues(
-    "emit-debug-entry-values", cl::Hidden,
-    cl::desc("Emit the debug entry values"), cl::init(false));
-
 static cl::opt<bool> GenerateARangeSection("generate-arange-section",
                                            cl::Hidden,
                                            cl::desc("Generate dwarf aranges"),
@@ -423,12 +419,6 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
   // a monolithic string offsets table without any header.
   UseSegmentedStringOffsetsTable = DwarfVersion >= 5;
 
-  // Emit call-site-param debug info for GDB and LLDB, if the target supports
-  // the debug entry values feature. It can also be enabled explicitly.
-  EmitDebugEntryValues = (Asm->TM.Options.ShouldEmitDebugEntryValues() &&
-                          (tuneForGDB() || tuneForLLDB())) ||
-                         EmitDwarfDebugEntryValues;
-
   Asm->OutStreamer->getContext().setDwarfVersion(DwarfVersion);
 }
 
@@ -850,8 +840,9 @@ void DwarfDebug::constructCallSiteEntryDIEs(const DISubprogram &SP,
       DIE &CallSiteDIE = CU.constructCallSiteEntryDIE(ScopeDIE, CalleeDIE,
                                                       IsTail, PCAddr, CallReg);
 
-      // Optionally emit call-site-param debug info.
-      if (emitDebugEntryValues()) {
+      // GDB and LLDB support call site parameter debug info.
+      if (Asm->TM.Options.EnableDebugEntryValues &&
+          (tuneForGDB() || tuneForLLDB())) {
         ParamSet Params;
         // Try to interpret values of call site parameters.
         collectCallSiteParameters(&MI, Params);
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
index 882fc73..a449605 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -386,11 +386,6 @@ class DwarfDebug : public DebugHandlerBase {
   /// a monolithic sequence of string offsets.
   bool UseSegmentedStringOffsetsTable;
 
-  /// Enable production of call site parameters needed to print the debug entry
-  /// values. Useful for testing purposes when a debugger does not support the
-  /// feature yet.
-  bool EmitDebugEntryValues;
-
   /// Separated Dwarf Variables
   /// In general these will all be for bits that are left in the
   /// original object file, rather than things that are meant
@@ -713,10 +708,6 @@ public:
     return UseSegmentedStringOffsetsTable;
   }
 
-  bool emitDebugEntryValues() const {
-    return EmitDebugEntryValues;
-  }
-
   bool shareAcrossDWOCUs() const;
 
   /// Returns the Dwarf Version.
diff --git a/llvm/lib/CodeGen/LiveDebugValues.cpp b/llvm/lib/CodeGen/LiveDebugValues.cpp
index 23a6369..259604a 100644
--- a/llvm/lib/CodeGen/LiveDebugValues.cpp
+++ b/llvm/lib/CodeGen/LiveDebugValues.cpp
@@ -984,7 +984,7 @@ void LiveDebugValues::transferRegisterDef(
 
   if (auto *TPC = getAnalysisIfAvailable<TargetPassConfig>()) {
     auto &TM = TPC->getTM<TargetMachine>();
-    if (TM.Options.ShouldEmitDebugEntryValues())
+    if (TM.Options.EnableDebugEntryValues)
       emitEntryValues(MI, OpenRanges, VarLocIDs, Transfers, KillSet);
   }
 }
@@ -1484,7 +1484,7 @@ void LiveDebugValues::recordEntryValue(const MachineInstr &MI,
                                        VarLocMap &VarLocIDs) {
   if (auto *TPC = getAnalysisIfAvailable<TargetPassConfig>()) {
     auto &TM = TPC->getTM<TargetMachine>();
-    if (!TM.Options.ShouldEmitDebugEntryValues())
+    if (!TM.Options.EnableDebugEntryValues)
       return;
   }
 
diff --git a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
index 69d14cf..10157c7 100644
--- a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
@@ -381,11 +381,11 @@ bool MIRParserImpl::initializeCallSiteInfo(
       CSInfo.emplace_back(Reg, ArgRegPair.ArgNo);
     }
 
-    if (TM.Options.ShouldEmitDebugEntryValues())
+    if (TM.Options.EnableDebugEntryValues)
       MF.addCallArgsForwardingRegs(&*CallI, std::move(CSInfo));
   }
 
-  if (YamlMF.CallSitesInfo.size() && !TM.Options.ShouldEmitDebugEntryValues())
+  if (YamlMF.CallSitesInfo.size() && !TM.Options.EnableDebugEntryValues)
     return error(Twine("Call site info provided but not used"));
   return false;
 }
diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp
index 2eb8d94..06b5ab5 100644
--- a/llvm/lib/CodeGen/MachineFunction.cpp
+++ b/llvm/lib/CodeGen/MachineFunction.cpp
@@ -865,7 +865,8 @@ MachineFunction::CallSiteInfoMap::iterator
 MachineFunction::getCallSiteInfo(const MachineInstr *MI) {
   assert(MI->isCandidateForCallSiteEntry() &&
          "Call site info refers only to call (MI) candidates");
-  if (!Target.Options.ShouldEmitDebugEntryValues())
+
+  if (!Target.Options.EnableDebugEntryValues)
     return CallSitesInfo.end();
   return CallSitesInfo.find(MI);
 }
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
index 532efa7..7bded00 100644
--- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
@@ -867,7 +867,7 @@ EmitSchedule(MachineBasicBlock::iterator &InsertPos) {
     }
 
     if (MI->isCandidateForCallSiteEntry() &&
-        DAG->getTarget().Options.ShouldEmitDebugEntryValues())
+        DAG->getTarget().Options.EnableDebugEntryValues)
       MF.addCallArgsForwardingRegs(MI, DAG->getSDCallSiteInfo(Node));
 
     return MI;
diff --git a/llvm/lib/CodeGen/TargetOptionsImpl.cpp b/llvm/lib/CodeGen/TargetOptionsImpl.cpp
index 3db0f2f..d794a26 100644
--- a/llvm/lib/CodeGen/TargetOptionsImpl.cpp
+++ b/llvm/lib/CodeGen/TargetOptionsImpl.cpp
@@ -45,11 +45,3 @@ bool TargetOptions::DisableFramePointerElim(const MachineFunction &MF) const {
 bool TargetOptions::HonorSignDependentRoundingFPMath() const {
   return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption;
 }
-
-/// NOTE: There are targets that still do not support the call site info
-/// production (the info about the arguments passed to the call, necessary
-/// for the debug entry values), so we keep using the experimental option
-/// (-debug-entry-values) to test them as well.
-bool TargetOptions::ShouldEmitDebugEntryValues() const {
-  return SupportsDebugEntryValues || EnableDebugEntryValues;
-}