[flang-commits] [flang] Revert "[flang][OpenMP] Fix copyprivate semantic checks" (PR #100478)

Leandro Lupori via flang-commits flang-commits at lists.llvm.org
Wed Jul 24 15:13:42 PDT 2024


https://github.com/luporl created https://github.com/llvm/llvm-project/pull/100478

Reverts llvm/llvm-project#95799

This caused errors in some internal test suites.

>From 8f950d0499fc797e89919eb4dcc264a845dcec77 Mon Sep 17 00:00:00 2001
From: Leandro Lupori <leandro.lupori at linaro.org>
Date: Wed, 24 Jul 2024 19:11:57 -0300
Subject: [PATCH] Revert "[flang][OpenMP] Fix copyprivate semantic checks
 (#95799)"

This reverts commit eb9bf188918bf5c88151d7735d925a3912a5b596.
---
 flang/include/flang/Semantics/tools.h         |   1 -
 flang/lib/Semantics/resolve-directives.cpp    | 138 ++++++------------
 flang/test/Semantics/OpenMP/copyprivate04.f90 | 112 --------------
 .../Semantics/OpenMP/do05-positivecase.f90    |   4 +-
 flang/test/Semantics/OpenMP/do20.f90          |   2 +-
 flang/test/Semantics/OpenMP/implicit-dsa.f90  |  14 +-
 flang/test/Semantics/OpenMP/reduction08.f90   |  10 +-
 flang/test/Semantics/OpenMP/reduction09.f90   |   8 +-
 flang/test/Semantics/OpenMP/symbol01.f90      |   4 +-
 flang/test/Semantics/OpenMP/symbol02.f90      |   4 +-
 flang/test/Semantics/OpenMP/symbol03.f90      |   4 +-
 flang/test/Semantics/OpenMP/symbol05.f90      |   4 +-
 flang/test/Semantics/OpenMP/symbol07.f90      |   2 +-
 flang/test/Semantics/OpenMP/symbol08.f90      |  36 ++---
 flang/test/Semantics/OpenMP/symbol09.f90      |   2 +-
 15 files changed, 95 insertions(+), 250 deletions(-)
 delete mode 100644 flang/test/Semantics/OpenMP/copyprivate04.f90

diff --git a/flang/include/flang/Semantics/tools.h b/flang/include/flang/Semantics/tools.h
index f21ef286181427..0fcba3131fad12 100644
--- a/flang/include/flang/Semantics/tools.h
+++ b/flang/include/flang/Semantics/tools.h
@@ -87,7 +87,6 @@ bool IsIntrinsicConcat(
 bool IsGenericDefinedOp(const Symbol &);
 bool IsDefinedOperator(SourceName);
 std::string MakeOpName(SourceName);
-bool IsCommonBlockContaining(const Symbol &, const Symbol &);
 
 // Returns true if maybeAncestor exists and is a proper ancestor of a
 // descendent scope (or symbol owner).  Will be false, unlike Scope::Contains(),
diff --git a/flang/lib/Semantics/resolve-directives.cpp b/flang/lib/Semantics/resolve-directives.cpp
index e9811151972fec..fb32ce6837fbfc 100644
--- a/flang/lib/Semantics/resolve-directives.cpp
+++ b/flang/lib/Semantics/resolve-directives.cpp
@@ -19,7 +19,6 @@
 #include "flang/Parser/parse-tree.h"
 #include "flang/Parser/tools.h"
 #include "flang/Semantics/expression.h"
-#include "flang/Semantics/tools.h"
 #include <list>
 #include <map>
 #include <sstream>
@@ -730,6 +729,7 @@ class OmpAttributeVisitor : DirectiveAttributeVisitor<llvm::omp::Directive> {
   void CheckNameInAllocateStmt(const parser::CharBlock &source,
       const parser::Name &ompObject, const parser::AllocateStmt &allocate);
 
+  bool HasSymbolInEnclosingScope(const Symbol &, Scope &);
   std::int64_t ordCollapseLevel{0};
 
   void AddOmpRequiresToScope(Scope &, WithOmpDeclarative::RequiresFlags,
@@ -2085,22 +2085,16 @@ void OmpAttributeVisitor::Post(const parser::Name &name) {
         }
       }
 
-      // When handling each implicit rule for a given symbol, one of the
-      // following 3 actions may be taken:
-      // 1. Declare a new private symbol.
-      // 2. Create a new association symbol with no flags, that will represent
-      //    a shared symbol in the current scope. Note that symbols without
-      //    any private flags are considered as shared.
-      // 3. Use the last declared private symbol, by inserting a new symbol
-      //    in the scope being processed, associated with it.
-      //    If no private symbol was declared previously, then no association
-      //    is needed and the symbol from the enclosing scope will be
-      //    inherited by the current one.
-      //
-      // Because of how symbols are collected in lowering, not inserting a new
-      // symbol in the last case could lead to the conclusion that a symbol
-      // from an enclosing construct was declared in the current construct,
-      // which would result in wrong privatization code being generated.
+      // When handling each implicit rule, either a new private symbol is
+      // declared or the last declared symbol is used.
+      // In the latter case, it's necessary to insert a new symbol in the scope
+      // being processed, associated with the last declared symbol.
+      // This captures the fact that, although we are using the last declared
+      // symbol, its DSA could be different in this scope.
+      // Also, because of how symbols are collected in lowering, not inserting
+      // a new symbol in this scope could lead to the conclusion that the
+      // symbol was declared in this construct, which would result in wrong
+      // privatization code being generated.
       // Consider the following example:
       //
       // !$omp parallel default(private)              ! p1
@@ -2113,56 +2107,48 @@ void OmpAttributeVisitor::Post(const parser::Name &name) {
       // (p2), it would use the x symbol definition from the enclosing scope.
       // Then, when p2's default symbols were collected in lowering, the x
       // symbol from the outer parallel construct (p1) would be collected, as
-      // it would have the private flag set.
+      // it would have the private flag set (note that symbols that don't have
+      // any private flag are considered as shared).
       // This would make x appear to be defined in p2, causing it to be
       // privatized in p2 and its privatization in p1 to be skipped.
-      auto makePrivateSymbol = [&](Symbol::Flag flag) {
+      auto declNewSymbol = [&](Symbol::Flag flag) {
         Symbol *hostSymbol =
             lastDeclSymbol ? lastDeclSymbol : &symbol->GetUltimate();
         lastDeclSymbol = DeclarePrivateAccessEntity(
             *hostSymbol, flag, context_.FindScope(dirContext.directiveSource));
         return lastDeclSymbol;
       };
-      auto makeSharedSymbol = [&]() {
-        Symbol *hostSymbol =
-            lastDeclSymbol ? lastDeclSymbol : &symbol->GetUltimate();
-        MakeAssocSymbol(symbol->name(), *hostSymbol,
-            context_.FindScope(dirContext.directiveSource));
-      };
       auto useLastDeclSymbol = [&]() {
         if (lastDeclSymbol)
           MakeAssocSymbol(symbol->name(), *lastDeclSymbol,
               context_.FindScope(dirContext.directiveSource));
       };
 
-      bool taskGenDir = llvm::omp::taskGeneratingSet.test(dirContext.directive);
-      bool targetDir = llvm::omp::allTargetSet.test(dirContext.directive);
-      bool parallelDir = llvm::omp::allParallelSet.test(dirContext.directive);
-      bool teamsDir = llvm::omp::allTeamsSet.test(dirContext.directive);
-
       if (dsa.has_value()) {
-        if (dsa.value() == Symbol::Flag::OmpShared &&
-            (parallelDir || taskGenDir || teamsDir))
-          makeSharedSymbol();
-        // Private symbols will have been declared already.
+        useLastDeclSymbol();
         prevDSA = dsa;
         continue;
       }
 
+      bool taskGenDir = llvm::omp::taskGeneratingSet.test(dirContext.directive);
+      bool targetDir = llvm::omp::allTargetSet.test(dirContext.directive);
+      bool parallelDir = llvm::omp::allParallelSet.test(dirContext.directive);
+
       if (dirContext.defaultDSA == Symbol::Flag::OmpPrivate ||
           dirContext.defaultDSA == Symbol::Flag::OmpFirstPrivate ||
           dirContext.defaultDSA == Symbol::Flag::OmpShared) {
         // 1) default
         // Allowed only with parallel, teams and task generating constructs.
-        assert(parallelDir || taskGenDir || teamsDir);
+        assert(parallelDir || taskGenDir ||
+            llvm::omp::allTeamsSet.test(dirContext.directive));
         if (dirContext.defaultDSA != Symbol::Flag::OmpShared)
-          makePrivateSymbol(dirContext.defaultDSA);
+          declNewSymbol(dirContext.defaultDSA);
         else
-          makeSharedSymbol();
+          useLastDeclSymbol();
         dsa = dirContext.defaultDSA;
       } else if (parallelDir) {
         // 2) parallel -> shared
-        makeSharedSymbol();
+        useLastDeclSymbol();
         dsa = Symbol::Flag::OmpShared;
       } else if (!taskGenDir && !targetDir) {
         // 3) enclosing context
@@ -2175,12 +2161,12 @@ void OmpAttributeVisitor::Post(const parser::Name &name) {
         // TODO 5) dummy arg in orphaned taskgen construct -> firstprivate
         if (prevDSA == Symbol::Flag::OmpShared) {
           // 6) shared in enclosing context -> shared
-          makeSharedSymbol();
+          useLastDeclSymbol();
           dsa = Symbol::Flag::OmpShared;
         } else {
           // 7) firstprivate
           dsa = Symbol::Flag::OmpFirstPrivate;
-          makePrivateSymbol(*dsa)->set(Symbol::Flag::OmpImplicit);
+          declNewSymbol(*dsa)->set(Symbol::Flag::OmpImplicit);
         }
       }
       prevDSA = dsa;
@@ -2584,59 +2570,20 @@ void ResolveOmpTopLevelParts(
   });
 }
 
-static bool IsSymbolInCommonBlock(const Symbol &symbol) {
-  // TODO Improve the performance of this predicate function.
-  //      Going through all symbols sequentially, in all common blocks, can be
-  //      slow when there are many symbols. A possible optimization is to add
-  //      an OmpInCommonBlock flag to Symbol, to make it possible to quickly
-  //      test if a given symbol is in a common block.
-  for (const auto &cb : symbol.owner().commonBlocks()) {
-    if (IsCommonBlockContaining(cb.second.get(), symbol)) {
-      return true;
-    }
-  }
-  return false;
-}
-
-static bool IsSymbolThreadprivate(const Symbol &symbol) {
+void OmpAttributeVisitor::CheckDataCopyingClause(
+    const parser::Name &name, const Symbol &symbol, Symbol::Flag ompFlag) {
+  const auto *checkSymbol{&symbol};
   if (const auto *details{symbol.detailsIf<HostAssocDetails>()}) {
-    return details->symbol().test(Symbol::Flag::OmpThreadprivate);
-  }
-  return symbol.test(Symbol::Flag::OmpThreadprivate);
-}
-
-static bool IsSymbolPrivate(const Symbol &symbol) {
-  if (symbol.test(Symbol::Flag::OmpPrivate) ||
-      symbol.test(Symbol::Flag::OmpFirstPrivate)) {
-    return true;
-  }
-  // A symbol that has not gone through constructs that may privatize the
-  // original symbol may be predetermined as private.
-  // (OMP 5.2 5.1.1 - Variables Referenced in a Construct)
-  if (symbol == symbol.GetUltimate()) {
-    switch (symbol.owner().kind()) {
-    case Scope::Kind::MainProgram:
-    case Scope::Kind::Subprogram:
-    case Scope::Kind::BlockConstruct:
-      return !symbol.attrs().test(Attr::SAVE) &&
-          !symbol.attrs().test(Attr::PARAMETER) && !IsAssumedShape(symbol) &&
-          !IsSymbolInCommonBlock(symbol);
-    default:
-      return false;
-    }
+    checkSymbol = &details->symbol();
   }
-  return false;
-}
 
-void OmpAttributeVisitor::CheckDataCopyingClause(
-    const parser::Name &name, const Symbol &symbol, Symbol::Flag ompFlag) {
   if (ompFlag == Symbol::Flag::OmpCopyIn) {
     // List of items/objects that can appear in a 'copyin' clause must be
     // 'threadprivate'
-    if (!IsSymbolThreadprivate(symbol)) {
+    if (!checkSymbol->test(Symbol::Flag::OmpThreadprivate)) {
       context_.Say(name.source,
           "Non-THREADPRIVATE object '%s' in COPYIN clause"_err_en_US,
-          symbol.name());
+          checkSymbol->name());
     }
   } else if (ompFlag == Symbol::Flag::OmpCopyPrivate &&
       GetContext().directive == llvm::omp::Directive::OMPD_single) {
@@ -2649,13 +2596,18 @@ void OmpAttributeVisitor::CheckDataCopyingClause(
           "COPYPRIVATE variable '%s' may not appear on a PRIVATE or "
           "FIRSTPRIVATE clause on a SINGLE construct"_err_en_US,
           symbol.name());
-    } else if (!IsSymbolThreadprivate(symbol) && !IsSymbolPrivate(symbol)) {
+    } else {
       // List of items/objects that can appear in a 'copyprivate' clause must be
       // either 'private' or 'threadprivate' in enclosing context.
-      context_.Say(name.source,
-          "COPYPRIVATE variable '%s' is not PRIVATE or THREADPRIVATE in "
-          "outer context"_err_en_US,
-          symbol.name());
+      if (!checkSymbol->test(Symbol::Flag::OmpThreadprivate) &&
+          !(HasSymbolInEnclosingScope(symbol, currScope()) &&
+              (symbol.test(Symbol::Flag::OmpPrivate) ||
+                  symbol.test(Symbol::Flag::OmpFirstPrivate)))) {
+        context_.Say(name.source,
+            "COPYPRIVATE variable '%s' is not PRIVATE or THREADPRIVATE in "
+            "outer context"_err_en_US,
+            symbol.name());
+      }
     }
   }
 }
@@ -2725,6 +2677,12 @@ void OmpAttributeVisitor::CheckLabelContext(const parser::CharBlock source,
   }
 }
 
+bool OmpAttributeVisitor::HasSymbolInEnclosingScope(
+    const Symbol &symbol, Scope &scope) {
+  const auto symbols{scope.parent().GetSymbols()};
+  return llvm::is_contained(symbols, symbol);
+}
+
 // Goes through the names in an OmpObjectList and checks if each name appears
 // in the given allocate statement
 void OmpAttributeVisitor::CheckAllNamesInAllocateStmt(
diff --git a/flang/test/Semantics/OpenMP/copyprivate04.f90 b/flang/test/Semantics/OpenMP/copyprivate04.f90
deleted file mode 100644
index 291cf1103fb279..00000000000000
--- a/flang/test/Semantics/OpenMP/copyprivate04.f90
+++ /dev/null
@@ -1,112 +0,0 @@
-! RUN: %python %S/../test_errors.py %s %flang_fc1 -fopenmp
-! OpenMP Version 5.2
-! 5.1.1 - Variables Referenced in a Construct
-! Copyprivate must accept variables that are predetermined as private.
-
-module m1
-  integer :: m
-end module
-
-program omp_copyprivate
-  use m1
-  implicit none
-  integer :: i
-  integer, save :: j
-  integer :: k
-  common /c/ k
-  real, parameter :: pi = 3.14
-  integer :: a1(10)
-
-  ! Local variables are private.
-  !$omp single
-    i = 123
-  !$omp end single copyprivate(i)
-  !$omp single
-  !$omp end single copyprivate(a1)
-
-  ! Variables with the SAVE attribute are not private.
-  !$omp single
-  !ERROR: COPYPRIVATE variable 'j' is not PRIVATE or THREADPRIVATE in outer context
-  !$omp end single copyprivate(j)
-
-  ! Common block variables are not private.
-  !$omp single
-  !ERROR: COPYPRIVATE variable 'k' is not PRIVATE or THREADPRIVATE in outer context
-  !$omp end single copyprivate(/c/)
-  !$omp single
-  !ERROR: COPYPRIVATE variable 'k' is not PRIVATE or THREADPRIVATE in outer context
-  !$omp end single copyprivate(k)
-
-  ! Module variables are not private.
-  !$omp single
-  !ERROR: COPYPRIVATE variable 'm' is not PRIVATE or THREADPRIVATE in outer context
-  !$omp end single copyprivate(m)
-
-  ! Parallel can make a variable shared.
-  !$omp parallel
-    !$omp single
-      i = 456
-    !ERROR: COPYPRIVATE variable 'i' is not PRIVATE or THREADPRIVATE in outer context
-    !$omp end single copyprivate(i)
-    call sub(j, a1)
-  !$omp end parallel
-
-  !$omp parallel shared(i)
-    !$omp single
-      i = 456
-    !ERROR: COPYPRIVATE variable 'i' is not PRIVATE or THREADPRIVATE in outer context
-    !$omp end single copyprivate(i)
-  !$omp end parallel
-
-  !FIXME: an error should be emitted in this case.
-  !       copyprivate(i) should be considered as a reference to i and a new
-  !       symbol should be created in `parallel` scope, for this case to be
-  !       handled properly.
-  !$omp parallel
-    !$omp single
-    !$omp end single copyprivate(i)
-  !$omp end parallel
-
-  ! Named constants are shared.
-  !$omp single
-  !ERROR: COPYPRIVATE variable 'pi' is not PRIVATE or THREADPRIVATE in outer context
-  !$omp end single copyprivate(pi)
-
-  !$omp parallel do
-  do i = 1, 10
-    !$omp parallel
-    !$omp single
-      j = i
-    !ERROR: COPYPRIVATE variable 'i' is not PRIVATE or THREADPRIVATE in outer context
-    !$omp end single copyprivate(i)
-    !$omp end parallel
-  end do
-  !$omp end parallel do
-
-contains
-  subroutine sub(s1, a)
-    integer :: s1
-    integer :: a(:)
-
-    ! Dummy argument.
-    !$omp single
-    !$omp end single copyprivate(s1)
-
-    ! Assumed shape arrays are shared.
-    !$omp single
-    !ERROR: COPYPRIVATE variable 'a' is not PRIVATE or THREADPRIVATE in outer context
-    !$omp end single copyprivate(a)
-  end subroutine
-
-  integer function fun(f1)
-    integer :: f1
-
-    ! Dummy argument.
-    !$omp single
-    !$omp end single copyprivate(f1)
-
-    ! Function result is private.
-    !$omp single
-    !$omp end single copyprivate(fun)
-  end function
-end program
diff --git a/flang/test/Semantics/OpenMP/do05-positivecase.f90 b/flang/test/Semantics/OpenMP/do05-positivecase.f90
index 3b512a5b4f25eb..4e02235f58a1a4 100644
--- a/flang/test/Semantics/OpenMP/do05-positivecase.f90
+++ b/flang/test/Semantics/OpenMP/do05-positivecase.f90
@@ -20,12 +20,12 @@ program omp_do
   !$omp parallel  default(shared)
   !$omp do
   !DEF: /omp_do/OtherConstruct2/OtherConstruct1/i (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
-  !DEF: /omp_do/OtherConstruct2/n HostAssoc INTEGER(4)
+  !REF: /omp_do/n
   do i=1,n
     !$omp parallel
     !$omp single
     !DEF: /work EXTERNAL (Subroutine) ProcEntity
-    !DEF: /omp_do/OtherConstruct2/OtherConstruct1/OtherConstruct1/i HostAssoc INTEGER(4)
+    !REF: /omp_do/OtherConstruct2/OtherConstruct1/i
     call work(i, 1)
     !$omp end single
     !$omp end parallel
diff --git a/flang/test/Semantics/OpenMP/do20.f90 b/flang/test/Semantics/OpenMP/do20.f90
index 0cafae76b86b00..915d01e69edd74 100644
--- a/flang/test/Semantics/OpenMP/do20.f90
+++ b/flang/test/Semantics/OpenMP/do20.f90
@@ -10,7 +10,7 @@ subroutine shared_iv
 
   !$omp parallel shared(i)
     !$omp single
-      !DEF: /shared_iv/OtherConstruct1/i HostAssoc INTEGER(4)
+      !REF: /shared_iv/i
       do i = 0, 1
       end do
     !$omp end single
diff --git a/flang/test/Semantics/OpenMP/implicit-dsa.f90 b/flang/test/Semantics/OpenMP/implicit-dsa.f90
index 2abe3a0e16d624..92d2421d06f971 100644
--- a/flang/test/Semantics/OpenMP/implicit-dsa.f90
+++ b/flang/test/Semantics/OpenMP/implicit-dsa.f90
@@ -15,14 +15,14 @@ subroutine implicit_dsa_test1
   !$omp task private(y) shared(z)
     !DEF: /implicit_dsa_test1/OtherConstruct1/x (OmpFirstPrivate, OmpImplicit) HostAssoc INTEGER(4)
     !DEF: /implicit_dsa_test1/OtherConstruct1/y (OmpPrivate) HostAssoc INTEGER(4)
-    !DEF: /implicit_dsa_test1/OtherConstruct1/z HostAssoc INTEGER(4)
+    !REF: /implicit_dsa_test1/z
     x = y + z
   !$omp end task
 
   !$omp task default(shared)
-    !DEF: /implicit_dsa_test1/OtherConstruct2/x HostAssoc INTEGER(4)
-    !DEF: /implicit_dsa_test1/OtherConstruct2/y HostAssoc INTEGER(4)
-    !DEF: /implicit_dsa_test1/OtherConstruct2/z HostAssoc INTEGER(4)
+    !REF: /implicit_dsa_test1/x
+    !REF: /implicit_dsa_test1/y
+    !REF: /implicit_dsa_test1/z
     x = y + z
   !$omp end task
 
@@ -61,16 +61,16 @@ subroutine implicit_dsa_test3
 
   !$omp parallel
     !$omp task
-      !DEF: /implicit_dsa_test3/OtherConstruct1/OtherConstruct1/x HostAssoc INTEGER(4)
+      !REF: /implicit_dsa_test3/x
       x = 1
-      !DEF: /implicit_dsa_test3/OtherConstruct1/OtherConstruct1/y HostAssoc INTEGER(4)
+      !REF: /implicit_dsa_test3/y
       y = 1
     !$omp end task
 
     !$omp task firstprivate(x)
       !DEF: /implicit_dsa_test3/OtherConstruct1/OtherConstruct2/x (OmpFirstPrivate) HostAssoc INTEGER(4)
       x = 1
-      !DEF: /implicit_dsa_test3/OtherConstruct1/OtherConstruct2/z HostAssoc INTEGER(4)
+      !REF: /implicit_dsa_test3/z
       z = 1
     !$omp end task
   !$omp end parallel
diff --git a/flang/test/Semantics/OpenMP/reduction08.f90 b/flang/test/Semantics/OpenMP/reduction08.f90
index 9442fbd4d5978a..99163327cdafa6 100644
--- a/flang/test/Semantics/OpenMP/reduction08.f90
+++ b/flang/test/Semantics/OpenMP/reduction08.f90
@@ -15,7 +15,7 @@ program omp_reduction
   do i=1,10
     !DEF: /omp_reduction/OtherConstruct1/k (OmpReduction) HostAssoc INTEGER(4)
     !DEF: /omp_reduction/max ELEMENTAL, INTRINSIC, PURE (Function) ProcEntity
-    !DEF: /omp_reduction/OtherConstruct1/m HostAssoc INTEGER(4)
+    !REF: /omp_reduction/m
     k = max(k, m)
   end do
   !$omp end parallel do
@@ -25,7 +25,7 @@ program omp_reduction
   do i=1,10
     !DEF: /omp_reduction/OtherConstruct2/k (OmpReduction) HostAssoc INTEGER(4)
     !DEF: /omp_reduction/min ELEMENTAL, INTRINSIC, PURE (Function) ProcEntity
-    !DEF: /omp_reduction/OtherConstruct2/m HostAssoc INTEGER(4)
+    !REF: /omp_reduction/m
     k = min(k, m)
   end do
   !$omp end parallel do
@@ -35,7 +35,7 @@ program omp_reduction
   do i=1,10
     !DEF: /omp_reduction/OtherConstruct3/k (OmpReduction) HostAssoc INTEGER(4)
     !DEF: /omp_reduction/iand ELEMENTAL, INTRINSIC, PURE (Function) ProcEntity
-    !DEF: /omp_reduction/OtherConstruct3/m HostAssoc INTEGER(4)
+    !REF: /omp_reduction/m
     k = iand(k, m)
   end do
   !$omp end parallel do
@@ -45,7 +45,7 @@ program omp_reduction
   do i=1,10
     !DEF: /omp_reduction/OtherConstruct4/k (OmpReduction) HostAssoc INTEGER(4)
     !DEF: /omp_reduction/ior ELEMENTAL, INTRINSIC, PURE (Function) ProcEntity
-    !DEF: /omp_reduction/OtherConstruct4/m HostAssoc INTEGER(4)
+    !REF: /omp_reduction/m
     k = ior(k, m)
   end do
   !$omp end parallel do
@@ -55,7 +55,7 @@ program omp_reduction
   do i=1,10
     !DEF: /omp_reduction/OtherConstruct5/k (OmpReduction) HostAssoc INTEGER(4)
     !DEF: /omp_reduction/ieor ELEMENTAL, INTRINSIC, PURE (Function) ProcEntity
-    !DEF: /omp_reduction/OtherConstruct5/m HostAssoc INTEGER(4)
+    !REF: /omp_reduction/m
     k = ieor(k,m)
   end do
   !$omp end parallel do
diff --git a/flang/test/Semantics/OpenMP/reduction09.f90 b/flang/test/Semantics/OpenMP/reduction09.f90
index 1af2fc4fd9691e..dbc8d1b060e65a 100644
--- a/flang/test/Semantics/OpenMP/reduction09.f90
+++ b/flang/test/Semantics/OpenMP/reduction09.f90
@@ -26,7 +26,7 @@ program omp_reduction
   !$omp parallel do  reduction(+:a(10))
   !DEF: /omp_reduction/OtherConstruct2/i (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
   do i=1,10
-    !DEF: /omp_reduction/OtherConstruct2/k HostAssoc INTEGER(4)
+    !REF: /omp_reduction/k
     k = k+1
   end do
   !$omp end parallel do
@@ -35,7 +35,7 @@ program omp_reduction
   !$omp parallel do  reduction(+:a(1:10:1))
   !DEF: /omp_reduction/OtherConstruct3/i (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
   do i=1,10
-    !DEF: /omp_reduction/OtherConstruct3/k HostAssoc INTEGER(4)
+    !REF: /omp_reduction/k
     k = k+1
   end do
   !$omp end parallel do
@@ -43,7 +43,7 @@ program omp_reduction
   !$omp parallel do  reduction(+:b(1:10:1,1:5,2))
   !DEF: /omp_reduction/OtherConstruct4/i (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
   do i=1,10
-    !DEF: /omp_reduction/OtherConstruct4/k HostAssoc INTEGER(4)
+    !REF: /omp_reduction/k
     k = k+1
   end do
   !$omp end parallel do
@@ -51,7 +51,7 @@ program omp_reduction
   !$omp parallel do  reduction(+:b(1:10:1,1:5,2:5:1))
   !DEF: /omp_reduction/OtherConstruct5/i (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
   do i=1,10
-    !DEF: /omp_reduction/OtherConstruct5/k HostAssoc INTEGER(4)
+    !REF: /omp_reduction/k
     k = k+1
   end do
   !$omp end parallel do
diff --git a/flang/test/Semantics/OpenMP/symbol01.f90 b/flang/test/Semantics/OpenMP/symbol01.f90
index ecfb8622f81794..0b435a9ab9850b 100644
--- a/flang/test/Semantics/OpenMP/symbol01.f90
+++ b/flang/test/Semantics/OpenMP/symbol01.f90
@@ -48,7 +48,7 @@ program mm
  !DEF: /mm/OtherConstruct1/i (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
  do i=1,10
   !DEF: /mm/OtherConstruct1/a (OmpPrivate) HostAssoc REAL(4)
-  !DEF: /mm/OtherConstruct1/b HostAssoc INTEGER(4)
+  !REF: /mm/b
   !REF: /mm/OtherConstruct1/i
   a = a+b(i)
   !DEF: /mm/OtherConstruct1/t (OmpPrivate) HostAssoc TYPE(myty)
@@ -62,7 +62,7 @@ program mm
   !REF: /mm/OtherConstruct1/i
   !REF: /mm/OtherConstruct1/y
   x = a+i+y
-  !DEF: /mm/OtherConstruct1/c HostAssoc REAL(4)
+  !REF: /mm/c
   c = 3.0
  end do
 end program
diff --git a/flang/test/Semantics/OpenMP/symbol02.f90 b/flang/test/Semantics/OpenMP/symbol02.f90
index c199c526e1fa8c..f6ffc5500d0a44 100644
--- a/flang/test/Semantics/OpenMP/symbol02.f90
+++ b/flang/test/Semantics/OpenMP/symbol02.f90
@@ -15,9 +15,9 @@
   a = 3.
   !DEF: /MainProgram1/OtherConstruct1/b (OmpPrivate) HostAssoc REAL(4)
   b = 4
-  !DEF: /MainProgram1/OtherConstruct1/c HostAssoc REAL(4)
+  !REF: /MainProgram1/c
   c = 5
-  !DEF: /MainProgram1/OtherConstruct1/d HostAssoc REAL(4)
+  !DEF: /MainProgram1/d (Implicit) ObjectEntity REAL(4)
   d = 6
   !$omp end parallel
   !DEF: /MainProgram1/a (Implicit) ObjectEntity REAL(4)
diff --git a/flang/test/Semantics/OpenMP/symbol03.f90 b/flang/test/Semantics/OpenMP/symbol03.f90
index ba941b9c9e7c4e..93e9b7a3eae6be 100644
--- a/flang/test/Semantics/OpenMP/symbol03.f90
+++ b/flang/test/Semantics/OpenMP/symbol03.f90
@@ -9,10 +9,10 @@
   !$omp parallel  private(a) shared(b)
   !DEF: /MainProgram1/OtherConstruct1/a (OmpPrivate) HostAssoc REAL(4)
   a = 3.
-  !DEF: /MainProgram1/OtherConstruct1/b HostAssoc REAL(4)
+  !REF: /MainProgram1/b
   b = 4
   !$omp parallel  private(b) shared(a)
-  !DEF: /MainProgram1/OtherConstruct1/OtherConstruct1/a HostAssoc REAL(4)
+  !REF: /MainProgram1/OtherConstruct1/a
   a = 5.
   !DEF: /MainProgram1/OtherConstruct1/OtherConstruct1/b (OmpPrivate) HostAssoc REAL(4)
   b = 6
diff --git a/flang/test/Semantics/OpenMP/symbol05.f90 b/flang/test/Semantics/OpenMP/symbol05.f90
index 1ad0c10a401350..fa0a8f65a42941 100644
--- a/flang/test/Semantics/OpenMP/symbol05.f90
+++ b/flang/test/Semantics/OpenMP/symbol05.f90
@@ -15,10 +15,10 @@ subroutine foo
     !DEF: /mm/foo/a ObjectEntity INTEGER(4)
     integer :: a = 3
     !$omp parallel
-    !DEF: /mm/foo/OtherConstruct1/a HostAssoc INTEGER(4)
+    !REF: /mm/foo/a
     a = 1
     !DEF: /mm/i PUBLIC (Implicit, OmpThreadprivate) ObjectEntity INTEGER(4)
-    !REF: /mm/foo/OtherConstruct1/a
+    !REF: /mm/foo/a
     i = a
     !$omp end parallel
     !REF: /mm/foo/a
diff --git a/flang/test/Semantics/OpenMP/symbol07.f90 b/flang/test/Semantics/OpenMP/symbol07.f90
index 8b4716999820b1..e2250f5c7908aa 100644
--- a/flang/test/Semantics/OpenMP/symbol07.f90
+++ b/flang/test/Semantics/OpenMP/symbol07.f90
@@ -23,7 +23,7 @@ subroutine function_call_in_region
   !$omp parallel  default(none) private(a) shared(b)
   !DEF: /function_call_in_region/OtherConstruct1/a (OmpPrivate) HostAssoc REAL(4)
   !REF: /function_call_in_region/foo
-  !DEF: /function_call_in_region/OtherConstruct1/b HostAssoc REAL(4)
+  !REF: /function_call_in_region/b
   a = foo(b)
   !$omp end parallel
   !REF: /function_call_in_region/a
diff --git a/flang/test/Semantics/OpenMP/symbol08.f90 b/flang/test/Semantics/OpenMP/symbol08.f90
index 69ccd17391b54f..3af85af74ee97c 100644
--- a/flang/test/Semantics/OpenMP/symbol08.f90
+++ b/flang/test/Semantics/OpenMP/symbol08.f90
@@ -28,18 +28,18 @@ subroutine test_do
  !DEF: /test_do/k ObjectEntity INTEGER(4)
  integer i, j, k
 !$omp parallel
- !DEF: /test_do/OtherConstruct1/i HostAssoc INTEGER(4)
+ !REF: /test_do/i
  i = 99
 !$omp do  collapse(2)
  !DEF: /test_do/OtherConstruct1/OtherConstruct1/i (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
  do i=1,5
   !DEF: /test_do/OtherConstruct1/OtherConstruct1/j (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
   do j=6,10
-   !DEF: /test_do/OtherConstruct1/a HostAssoc REAL(4)
+   !REF: /test_do/a
    a(1,1,1) = 0.
    !DEF: /test_do/OtherConstruct1/k (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
    do k=11,15
-    !REF: /test_do/OtherConstruct1/a
+    !REF: /test_do/a
     !REF: /test_do/OtherConstruct1/k
     !REF: /test_do/OtherConstruct1/OtherConstruct1/j
     !REF: /test_do/OtherConstruct1/OtherConstruct1/i
@@ -65,11 +65,11 @@ subroutine test_pardo
  do i=1,5
    !DEF: /test_pardo/OtherConstruct1/j (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
     do j=6,10
-   !DEF: /test_pardo/OtherConstruct1/a HostAssoc REAL(4)
+   !REF: /test_pardo/a
    a(1,1,1) = 0.
    !DEF: /test_pardo/OtherConstruct1/k (OmpPrivate) HostAssoc INTEGER(4)
    do k=11,15
-    !REF: /test_pardo/OtherConstruct1/a
+    !REF: /test_pardo/a
     !REF: /test_pardo/OtherConstruct1/k
     !REF: /test_pardo/OtherConstruct1/j
     !REF: /test_pardo/OtherConstruct1/i
@@ -138,15 +138,15 @@ subroutine dotprod (b, c, n, block_size, num_teams, block_threads)
  do i0=1,n,block_size
 !$omp parallel do  reduction(+:sum)
   !DEF: /dotprod/OtherConstruct1/OtherConstruct1/OtherConstruct1/OtherConstruct1/i (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
-  !DEF: /dotprod/OtherConstruct1/OtherConstruct1/OtherConstruct1/OtherConstruct1/i0 HostAssoc INTEGER(4)
+  !REF: /dotprod/OtherConstruct1/OtherConstruct1/OtherConstruct1/i0
   !DEF: /dotprod/min ELEMENTAL, INTRINSIC, PURE (Function) ProcEntity
-  !DEF: /dotprod/OtherConstruct1/OtherConstruct1/OtherConstruct1/OtherConstruct1/block_size HostAssoc INTEGER(4)
-  !DEF: /dotprod/OtherConstruct1/OtherConstruct1/OtherConstruct1/OtherConstruct1/n HostAssoc INTEGER(4)
+  !REF: /dotprod/block_size
+  !REF: /dotprod/n
   do i=i0,min(i0+block_size, n)
    !DEF: /dotprod/OtherConstruct1/OtherConstruct1/OtherConstruct1/OtherConstruct1/sum (OmpReduction) HostAssoc REAL(4)
-   !DEF: /dotprod/OtherConstruct1/OtherConstruct1/OtherConstruct1/OtherConstruct1/b HostAssoc REAL(4)
+   !REF: /dotprod/b
    !REF: /dotprod/OtherConstruct1/OtherConstruct1/OtherConstruct1/OtherConstruct1/i
-   !DEF: /dotprod/OtherConstruct1/OtherConstruct1/OtherConstruct1/OtherConstruct1/c HostAssoc REAL(4)
+   !REF: /dotprod/c
    sum = sum+b(i)*c(i)
   end do
  end do
@@ -174,7 +174,7 @@ subroutine test_simd
   do j=6,10
    !DEF: /test_simd/OtherConstruct1/k (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
    do k=11,15
-    !DEF: /test_simd/OtherConstruct1/a HostAssoc REAL(4)
+    !REF: /test_simd/a
     !REF: /test_simd/OtherConstruct1/k
     !REF: /test_simd/OtherConstruct1/j
     !REF: /test_simd/OtherConstruct1/i
@@ -201,7 +201,7 @@ subroutine test_simd_multi
   do j=6,10
    !DEF: /test_simd_multi/OtherConstruct1/k (OmpLastPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
    do k=11,15
-    !DEF: /test_simd_multi/OtherConstruct1/a HostAssoc REAL(4)
+    !REF: /test_simd_multi/a
     !REF: /test_simd_multi/OtherConstruct1/k
     !REF: /test_simd_multi/OtherConstruct1/j
     !REF: /test_simd_multi/OtherConstruct1/i
@@ -223,11 +223,11 @@ subroutine test_seq_loop
   !REF: /test_seq_loop/j
   j = -1
   !$omp parallel
-  !DEF: /test_seq_loop/OtherConstruct1/i HostAssoc INTEGER(4)
-  !DEF: /test_seq_loop/OtherConstruct1/j HostAssoc INTEGER(4)
+  !REF: /test_seq_loop/i
+  !REF: /test_seq_loop/j
   print *, i, j
   !$omp parallel
-  !DEF: /test_seq_loop/OtherConstruct1/OtherConstruct1/i HostAssoc INTEGER(4)
+  !REF: /test_seq_loop/i
   !DEF: /test_seq_loop/OtherConstruct1/OtherConstruct1/j (OmpPrivate, OmpPreDetermined) HostAssoc INTEGER(4)
   print *, i, j
   !$omp do
@@ -237,12 +237,12 @@ subroutine test_seq_loop
    do j=1,10
    end do
   end do
-  !REF: /test_seq_loop/OtherConstruct1/OtherConstruct1/i
+  !REF: /test_seq_loop/i
   !REF: /test_seq_loop/OtherConstruct1/OtherConstruct1/j
   print *, i, j
   !$omp end parallel
-  !REF: /test_seq_loop/OtherConstruct1/i
-  !REF: /test_seq_loop/OtherConstruct1/j
+  !REF: /test_seq_loop/i
+  !REF: /test_seq_loop/j
   print *, i, j
   !$omp end parallel
   !REF: /test_seq_loop/i
diff --git a/flang/test/Semantics/OpenMP/symbol09.f90 b/flang/test/Semantics/OpenMP/symbol09.f90
index 8b4716999820b1..e2250f5c7908aa 100644
--- a/flang/test/Semantics/OpenMP/symbol09.f90
+++ b/flang/test/Semantics/OpenMP/symbol09.f90
@@ -23,7 +23,7 @@ subroutine function_call_in_region
   !$omp parallel  default(none) private(a) shared(b)
   !DEF: /function_call_in_region/OtherConstruct1/a (OmpPrivate) HostAssoc REAL(4)
   !REF: /function_call_in_region/foo
-  !DEF: /function_call_in_region/OtherConstruct1/b HostAssoc REAL(4)
+  !REF: /function_call_in_region/b
   a = foo(b)
   !$omp end parallel
   !REF: /function_call_in_region/a



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