[OPENMP 4.0] Codegen for array sections.

Added codegen for array section in 'depend' clause of 'task' directive. It emits to pointers, one for the begin of array section and another for the end of array section. Size of the section is calculated as (end + 1 - start) * sizeof(basic_element_type).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@246278 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index a0d004d315c8b90890bd6fe111805762a8951f72..bf660b448c3de2c5b2f2f4207a4cb53130646132 100644 (file)
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -911,6 +911,8 @@ LValue CodeGenFunction::EmitLValue(const Expr *E) {
     return EmitUnaryOpLValue(cast<UnaryOperator>(E));
   case Expr::ArraySubscriptExprClass:
     return EmitArraySubscriptExpr(cast<ArraySubscriptExpr>(E));
+  case Expr::OMPArraySectionExprClass:
+    return EmitOMPArraySectionExpr(cast<OMPArraySectionExpr>(E));
   case Expr::ExtVectorElementExprClass:
     return EmitExtVectorElementExpr(cast<ExtVectorElementExpr>(E));
   case Expr::MemberExprClass:
@@ -2559,6 +2561,131 @@ LValue CodeGenFunction::EmitArraySubscriptExpr(const ArraySubscriptExpr *E,
   return LV;
 }
 
+LValue CodeGenFunction::EmitOMPArraySectionExpr(const OMPArraySectionExpr *E,
+                                                bool LowerBound) {
+  LValue Base;
+  if (auto *ASE =
+          dyn_cast<OMPArraySectionExpr>(E->getBase()->IgnoreParenImpCasts()))
+    Base = EmitOMPArraySectionExpr(ASE, LowerBound);
+  else
+    Base = EmitLValue(E->getBase());
+  QualType BaseTy = Base.getType();
+  llvm::Value *Idx;
+  QualType ResultExprTy;
+  if (auto *AT = getContext().getAsArrayType(BaseTy))
+    ResultExprTy = AT->getElementType();
+  else
+    ResultExprTy = BaseTy->getPointeeType();
+  if (LowerBound) {
+    Idx = E->getLowerBound()
+              ? Builder.CreateIntCast(EmitScalarExpr(E->getLowerBound()),
+                                      IntPtrTy,
+                                      E->getLowerBound()
+                                          ->getType()
+                                          ->hasSignedIntegerRepresentation())
+              : llvm::ConstantInt::getNullValue(IntPtrTy);
+  } else {
+    auto &C = CGM.getContext();
+    auto *Length = E->getLength();
+    if (Length || E->getColonLoc().isInvalid()) {
+      // Idx = LowerBound + Length - 1;
+      auto *One = llvm::ConstantInt::get(IntPtrTy, /*V=*/1);
+      if (Length) {
+        Idx = Builder.CreateIntCast(
+            EmitScalarExpr(Length), IntPtrTy,
+            Length->getType()->hasSignedIntegerRepresentation());
+      }
+      auto *LowerBound = E->getLowerBound();
+      llvm::APSInt ConstLowerBound;
+      if (LowerBound && LowerBound->isIntegerConstantExpr(ConstLowerBound, C))
+        LowerBound = nullptr;
+      if (LowerBound && ConstLowerBound.getZExtValue() != 0) {
+        auto *LowerBoundVal = Builder.CreateIntCast(
+            EmitScalarExpr(LowerBound), IntPtrTy,
+            LowerBound->getType()->hasSignedIntegerRepresentation());
+        if (E->getColonLoc().isValid()) {
+          if (getLangOpts().isSignedOverflowDefined())
+            Idx = Builder.CreateAdd(Idx, LowerBoundVal);
+          else
+            Idx = Builder.CreateNSWAdd(Idx, LowerBoundVal);
+        } else
+          Idx = LowerBoundVal;
+      }
+      if (E->getColonLoc().isValid()) {
+        if (getLangOpts().isSignedOverflowDefined())
+          Idx = Builder.CreateSub(Idx, One);
+        else
+          Idx = Builder.CreateNSWSub(Idx, One);
+      }
+    } else if (auto *VAT = C.getAsVariableArrayType(BaseTy)) {
+      // Idx = ArrSize - 1;
+      Length = VAT->getSizeExpr();
+      Idx = Builder.CreateIntCast(
+          EmitScalarExpr(Length), IntPtrTy,
+          Length->getType()->hasSignedIntegerRepresentation());
+      auto *One = llvm::ConstantInt::get(IntPtrTy, /*V=*/1);
+      if (getLangOpts().isSignedOverflowDefined())
+        Idx = Builder.CreateSub(Idx, One);
+      else
+        Idx = Builder.CreateNSWSub(Idx, One);
+    } else {
+      // Idx = ArrSize - 1;
+      auto *CAT = C.getAsConstantArrayType(BaseTy);
+      Idx = llvm::ConstantInt::get(IntPtrTy, CAT->getSize().getZExtValue() - 1);
+    }
+  }
+
+  llvm::Value *Address;
+  CharUnits ArrayAlignment;
+  if (auto *VLA = getContext().getAsVariableArrayType(ResultExprTy)) {
+    // The element count here is the total number of non-VLA elements.
+    llvm::Value *numElements = getVLASize(VLA).first;
+
+    // Effectively, the multiply by the VLA size is part of the GEP.
+    // GEP indexes are signed, and scaling an index isn't permitted to
+    // signed-overflow, so we use the same semantics for our explicit
+    // multiply.  We suppress this if overflow is not undefined behavior.
+    if (getLangOpts().isSignedOverflowDefined()) {
+      Idx = Builder.CreateMul(Idx, numElements);
+      Address = Builder.CreateGEP(Base.getAddress(), Idx, "arrayidx");
+    } else {
+      Idx = Builder.CreateNSWMul(Idx, numElements);
+      Address = Builder.CreateInBoundsGEP(Base.getAddress(), Idx, "arrayidx");
+    }
+  } else if (BaseTy->isConstantArrayType()) {
+    llvm::Value *ArrayPtr = Base.getAddress();
+    llvm::Value *Zero = llvm::ConstantInt::getNullValue(IntPtrTy);
+    llvm::Value *Args[] = {Zero, Idx};
+
+    // Propagate the alignment from the array itself to the result.
+    ArrayAlignment = Base.getAlignment();
+
+    if (getLangOpts().isSignedOverflowDefined())
+      Address = Builder.CreateGEP(ArrayPtr, Args, "arrayidx");
+    else
+      Address = Builder.CreateInBoundsGEP(ArrayPtr, Args, "arrayidx");
+  } else {
+    // The base must be a pointer, which is not an aggregate.  Emit it.
+    if (getLangOpts().isSignedOverflowDefined())
+      Address = Builder.CreateGEP(Base.getAddress(), Idx, "arrayidx");
+    else
+      Address = Builder.CreateInBoundsGEP(Base.getAddress(), Idx, "arrayidx");
+  }
+
+  // Limit the alignment to that of the result type.
+  LValue LV;
+  if (!ArrayAlignment.isZero()) {
+    CharUnits Align = getContext().getTypeAlignInChars(ResultExprTy);
+    ArrayAlignment = std::min(Align, ArrayAlignment);
+    LV = MakeAddrLValue(Address, ResultExprTy, ArrayAlignment);
+  } else
+    LV = MakeNaturalAlignAddrLValue(Address, ResultExprTy);
+
+  LV.getQuals().setAddressSpace(BaseTy.getAddressSpace());
+
+  return LV;
+}
+
 LValue CodeGenFunction::
 EmitExtVectorElementExpr(const ExtVectorElementExpr *E) {
   // Emit the base vector as an l-value.

diff --git a/lib/CodeGen/CGOpenMPRuntime.cpp b/lib/CodeGen/CGOpenMPRuntime.cpp
index f734298360b8910fc68b95aabcb242eaed817673..f4148db7519468f75366c8f1216ab7e521ca04ff 100644 (file)
--- a/lib/CodeGen/CGOpenMPRuntime.cpp
+++ b/lib/CodeGen/CGOpenMPRuntime.cpp
@@ -2091,6 +2091,27 @@ emitTaskPrivateMappingFunction(CodeGenModule &CGM, SourceLocation Loc,
   return TaskPrivatesMap;
 }
 
+llvm::Value *getTypeSize(CodeGenFunction &CGF, QualType Ty) {
+  auto &C = CGF.getContext();
+  llvm::Value *Size;
+  auto SizeInChars = C.getTypeSizeInChars(Ty);
+  if (SizeInChars.isZero()) {
+    // getTypeSizeInChars() returns 0 for a VLA.
+    Size = nullptr;
+    while (auto *VAT = C.getAsVariableArrayType(Ty)) {
+      llvm::Value *ArraySize;
+      std::tie(ArraySize, Ty) = CGF.getVLASize(VAT);
+      Size = Size ? CGF.Builder.CreateNUWMul(Size, ArraySize) : ArraySize;
+    }
+    SizeInChars = C.getTypeSizeInChars(Ty);
+    assert(!SizeInChars.isZero());
+    Size = CGF.Builder.CreateNUWMul(
+        Size, llvm::ConstantInt::get(CGF.SizeTy, SizeInChars.getQuantity()));
+  } else
+    Size = llvm::ConstantInt::get(CGF.SizeTy, SizeInChars.getQuantity());
+  return Size;
+}
+
 static int array_pod_sort_comparator(const PrivateDataTy *P1,
                                      const PrivateDataTy *P2) {
   return P1->first < P2->first ? 1 : (P2->first < P1->first ? -1 : 0);
@@ -2328,19 +2349,30 @@ void CGOpenMPRuntime::emitTaskCall(
     // kmp_depend_info[<Dependences.size()>] deps;
     DependInfo = CGF.CreateMemTemp(KmpDependInfoArrayTy);
     for (unsigned i = 0; i < DependencesNumber; ++i) {
-      auto Addr = CGF.EmitLValue(Dependences[i].second);
-      auto *Size = llvm::ConstantInt::get(
-          CGF.SizeTy,
-          C.getTypeSizeInChars(Dependences[i].second->getType()).getQuantity());
+      auto *E = Dependences[i].second;
+      LValue Addr = CGF.EmitLValue(E);
+      llvm::Value *Size;
+      QualType Ty = E->getType();
+      auto *DestAddr = Addr.getAddress();
+      if (auto *ASE = dyn_cast<OMPArraySectionExpr>(E->IgnoreParenImpCasts())) {
+        LValue UpAddrLVal =
+            CGF.EmitOMPArraySectionExpr(ASE, /*LowerBound=*/false);
+        llvm::Value *UpAddr =
+            CGF.Builder.CreateConstGEP1_32(UpAddrLVal.getAddress(), /*Idx0=*/1);
+        llvm::Value *LowIntPtr =
+            CGF.Builder.CreatePtrToInt(DestAddr, CGM.SizeTy);
+        llvm::Value *UpIntPtr = CGF.Builder.CreatePtrToInt(UpAddr, CGM.SizeTy);
+        Size = CGF.Builder.CreateNUWSub(UpIntPtr, LowIntPtr);
+      } else
+        Size = getTypeSize(CGF, Ty);
       auto Base = CGF.MakeNaturalAlignAddrLValue(
           CGF.Builder.CreateStructGEP(/*Ty=*/nullptr, DependInfo, i),
           KmpDependInfoTy);
       // deps[i].base_addr = &<Dependences[i].second>;
       auto BaseAddrLVal = CGF.EmitLValueForField(
           Base, *std::next(KmpDependInfoRD->field_begin(), BaseAddr));
-      CGF.EmitStoreOfScalar(
-          CGF.Builder.CreatePtrToInt(Addr.getAddress(), CGF.IntPtrTy),
-          BaseAddrLVal);
+      CGF.EmitStoreOfScalar(CGF.Builder.CreatePtrToInt(DestAddr, CGF.IntPtrTy),
+                            BaseAddrLVal);
       // deps[i].len = sizeof(<Dependences[i].second>);
       auto LenLVal = CGF.EmitLValueForField(
           Base, *std::next(KmpDependInfoRD->field_begin(), Len));

diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index 26ce8e72afad939b5d18b402ee552f549196465b..ca3d3c40decb1cf7f4ca64b682c40a2316f5f36a 100644 (file)
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -24,6 +24,7 @@
 #include "clang/AST/CharUnits.h"
 #include "clang/AST/ExprCXX.h"
 #include "clang/AST/ExprObjC.h"
+#include "clang/AST/ExprOpenMP.h"
 #include "clang/AST/Type.h"
 #include "clang/Basic/ABI.h"
 #include "clang/Basic/CapturedStmt.h"
@@ -2427,6 +2428,8 @@ public:
   LValue EmitUnaryOpLValue(const UnaryOperator *E);
   LValue EmitArraySubscriptExpr(const ArraySubscriptExpr *E,
                                 bool Accessed = false);
+  LValue EmitOMPArraySectionExpr(const OMPArraySectionExpr *E,
+                                 bool LowerBound = true);
   LValue EmitExtVectorElementExpr(const ExtVectorElementExpr *E);
   LValue EmitMemberExpr(const MemberExpr *E);
   LValue EmitObjCIsaExpr(const ObjCIsaExpr *E);

diff --git a/test/OpenMP/task_codegen.cpp b/test/OpenMP/task_codegen.cpp
index 139ac505a9f65e9a1e935323f30e2b319b9d7508..a91ec1837de177f85aea9cbe0a7b2b12fba7e37e 100644 (file)
--- a/test/OpenMP/task_codegen.cpp
+++ b/test/OpenMP/task_codegen.cpp
@@ -24,6 +24,7 @@ int main() {
 // CHECK: [[S:%.+]] = alloca [2 x [[STRUCT_S]]]
   char b;
   S s[2];
+  int arr[10][a];
 // CHECK: [[GTID:%.+]] = call i32 @__kmpc_global_thread_num([[IDENT_T]]* @{{.+}})
 // CHECK: [[B_REF:%.+]] = getelementptr inbounds [[STRUCT_SHAREDS]], [[STRUCT_SHAREDS]]* [[CAPTURES:%.+]], i32 0, i32 0
 // CHECK: store i8* [[B]], i8** [[B_REF]]
@@ -52,14 +53,14 @@ int main() {
 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[SHAREDS_REF]], i8* [[BITCAST]], i64 8, i32 8, i1 false)
 // CHECK: [[DESTRUCTORS_REF_PTR:%.+]] = getelementptr inbounds [[KMP_TASK_T]], [[KMP_TASK_T]]* [[TASK_PTR]], i32 0, i32 3
 // CHECK: store i32 (i32, i8*)* null, i32 (i32, i8*)** [[DESTRUCTORS_REF_PTR]]
-// CHECK: getelementptr inbounds [3 x [[KMP_DEPEND_INFO]]], [3 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
+// CHECK: getelementptr inbounds [4 x [[KMP_DEPEND_INFO]]], [4 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: store i64 ptrtoint (i32* @{{.+}} to i64), i64*
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 1
 // CHECK: store i64 4, i64*
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 2
 // CHECK: store i8 1, i8*
-// CHECK: getelementptr inbounds [3 x [[KMP_DEPEND_INFO]]], [3 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 1
+// CHECK: getelementptr inbounds [4 x [[KMP_DEPEND_INFO]]], [4 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 1
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: ptrtoint i8* [[B]] to i64
 // CHECK: store i64 %{{[^,]+}}, i64*
@@ -67,7 +68,7 @@ int main() {
 // CHECK: store i64 1, i64*
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 2
 // CHECK: store i8 1, i8*
-// CHECK: getelementptr inbounds [3 x [[KMP_DEPEND_INFO]]], [3 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 2
+// CHECK: getelementptr inbounds [4 x [[KMP_DEPEND_INFO]]], [4 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 2
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: ptrtoint [2 x [[STRUCT_S]]]* [[S]] to i64
 // CHECK: store i64 %{{[^,]+}}, i64*
@@ -75,10 +76,26 @@ int main() {
 // CHECK: store i64 8, i64*
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 2
 // CHECK: store i8 1, i8*
-// CHECK: getelementptr inbounds [3 x [[KMP_DEPEND_INFO]]], [3 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
+// CHECK: [[IDX1:%.+]] = mul nsw i64 0, [[A_VAL:%.+]]
+// CHECK: [[START:%.+]] = getelementptr inbounds i32, i32* %{{.+}}, i64 [[IDX1]]
+// CHECK: [[IDX1:%.+]] = mul nsw i64 9, [[A_VAL]]
+// CHECK: [[END:%.+]] = getelementptr inbounds i32, i32* %{{.+}}, i64 [[IDX1]]
+// CHECK: [[END1:%.+]] = getelementptr i32, i32* [[END]], i32 1
+// CHECK: [[START_INT:%.+]] = ptrtoint i32* [[START]] to i64
+// CHECK: [[END_INT:%.+]] = ptrtoint i32* [[END1]] to i64
+// CHECK: [[SIZEOF:%.+]] = sub nuw i64 [[END_INT]], [[START_INT]]
+// CHECK: getelementptr inbounds [4 x [[KMP_DEPEND_INFO]]], [4 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 3
+// CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 0
+// CHECK: ptrtoint i32* [[START]] to i64
+// CHECK: store i64 %{{[^,]+}}, i64*
+// CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 1
+// CHECK: store i64 [[SIZEOF]], i64*
+// CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 2
+// CHECK: store i8 1, i8*
+// CHECK: getelementptr inbounds [4 x [[KMP_DEPEND_INFO]]], [4 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: bitcast [[KMP_DEPEND_INFO]]* %{{.+}} to i8*
-// CHECK: call i32 @__kmpc_omp_task_with_deps([[IDENT_T]]* @{{.+}}, i32 [[GTID]], i8* [[ORIG_TASK_PTR]], i32 3, i8* %{{[^,]+}}, i32 0, i8* null)
-#pragma omp task shared(a, s) depend(in : a, b, s)
+// CHECK: call i32 @__kmpc_omp_task_with_deps([[IDENT_T]]* @{{.+}}, i32 [[GTID]], i8* [[ORIG_TASK_PTR]], i32 4, i8* %{{[^,]+}}, i32 0, i8* null)
+#pragma omp task shared(a, s) depend(in : a, b, s, arr[:])
   {
     a = 15;
     s[1].a = 10;
@@ -95,7 +112,7 @@ int main() {
 // CHECK: [[DESTRUCTORS_REF_PTR:%.+]] = getelementptr inbounds [[KMP_TASK_T]]{{.*}}* {{%.+}}, i32 0, i32 3
 // CHECK: store i32 (i32, i8*)* null, i32 (i32, i8*)** [[DESTRUCTORS_REF_PTR]]
 // CHECK: getelementptr inbounds [2 x [[STRUCT_S]]], [2 x [[STRUCT_S]]]* [[S]], i32 0, i64 0
-// CHECK: getelementptr inbounds [1 x [[KMP_DEPEND_INFO]]], [1 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
+// CHECK: getelementptr inbounds [2 x [[KMP_DEPEND_INFO]]], [2 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: ptrtoint [[STRUCT_S]]* %{{.+}} to i64
 // CHECK: store i64 %{{[^,]+}}, i64*
@@ -103,17 +120,39 @@ int main() {
 // CHECK: store i64 4, i64*
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 2
 // CHECK: store i8 2, i8*
-// CHECK: getelementptr inbounds [1 x [[KMP_DEPEND_INFO]]], [1 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
+// CHECK: [[IDX1:%.+]] = mul nsw i64 4, [[A_VAL]]
+// CHECK: [[START:%.+]] = getelementptr inbounds i32, i32* %{{.+}}, i64 [[IDX1]]
+// CHECK: [[B_VAL:%.+]] = load i8, i8* [[B]]
+// CHECK: [[IDX2:%.+]] = sext i8 [[B_VAL]] to i64
+// CHECK: [[START1:%.+]] = getelementptr inbounds i32, i32* [[START]], i64 [[IDX2]]
+// CHECK: [[IDX1:%.+]] = mul nsw i64 9, [[A_VAL]]
+// CHECK: [[END:%.+]] = getelementptr inbounds i32, i32* %{{.+}}, i64 [[IDX1]]
+// CHECK: [[B_VAL:%.+]] = load i8, i8* [[B]]
+// CHECK: [[IDX2:%.+]] = sext i8 [[B_VAL]] to i64
+// CHECK: [[END1:%.+]] = getelementptr inbounds i32, i32* [[END]], i64 [[IDX2]]
+// CHECK: [[END2:%.+]] = getelementptr i32, i32* [[END1]], i32 1
+// CHECK: [[START_INT:%.+]] = ptrtoint i32* [[START1]] to i64
+// CHECK: [[END_INT:%.+]] = ptrtoint i32* [[END2]] to i64
+// CHECK: [[SIZEOF:%.+]] = sub nuw i64 [[END_INT]], [[START_INT]]
+// CHECK: getelementptr inbounds [2 x [[KMP_DEPEND_INFO]]], [2 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 1
+// CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 0
+// CHECK: ptrtoint i32* [[START1]] to i64
+// CHECK: store i64 %{{[^,]+}}, i64*
+// CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 1
+// CHECK: store i64 [[SIZEOF]], i64*
+// CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 2
+// CHECK: store i8 2, i8*
+// CHECK: getelementptr inbounds [2 x [[KMP_DEPEND_INFO]]], [2 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: bitcast [[KMP_DEPEND_INFO]]* %{{.+}} to i8*
-// CHECK: call i32 @__kmpc_omp_task_with_deps([[IDENT_T]]* @{{.+}}, i32 [[GTID]], i8* [[ORIG_TASK_PTR]], i32 1, i8* %{{[^,]+}}, i32 0, i8* null)
-#pragma omp task untied depend(out : s[0])
+// CHECK: call i32 @__kmpc_omp_task_with_deps([[IDENT_T]]* @{{.+}}, i32 [[GTID]], i8* [[ORIG_TASK_PTR]], i32 2, i8* %{{[^,]+}}, i32 0, i8* null)
+#pragma omp task untied depend(out : s[0], arr[4:][b])
   {
     a = 1;
   }
 // CHECK: [[ORIG_TASK_PTR:%.+]] = call i8* @__kmpc_omp_task_alloc([[IDENT_T]]* @{{.+}}, i32 [[GTID]], i32 3, i64 32, i64 1,
 // CHECK: [[DESTRUCTORS_REF_PTR:%.+]] = getelementptr inbounds [[KMP_TASK_T]]{{.*}}* {{%.+}}, i32 0, i32 3
 // CHECK: store i32 (i32, i8*)* null, i32 (i32, i8*)** [[DESTRUCTORS_REF_PTR]]
-// CHECK: getelementptr inbounds [2 x [[KMP_DEPEND_INFO]]], [2 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
+// CHECK: getelementptr inbounds [3 x [[KMP_DEPEND_INFO]]], [3 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: store i64 ptrtoint (i32* @{{.+}} to i64), i64*
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 1
@@ -121,7 +160,7 @@ int main() {
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 2
 // CHECK: store i8 3, i8*
 // CHECK: getelementptr inbounds [2 x [[STRUCT_S]]], [2 x [[STRUCT_S]]]* [[S]], i32 0, i64 1
-// CHECK: getelementptr inbounds [2 x [[KMP_DEPEND_INFO]]], [2 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 1
+// CHECK: getelementptr inbounds [3 x [[KMP_DEPEND_INFO]]], [3 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 1
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: ptrtoint [[STRUCT_S]]* %{{.+}} to i64
 // CHECK: store i64 %{{[^,]+}}, i64*
@@ -129,10 +168,34 @@ int main() {
 // CHECK: store i64 4, i64*
 // CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 2
 // CHECK: store i8 3, i8*
-// CHECK: getelementptr inbounds [2 x [[KMP_DEPEND_INFO]]], [2 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
+// CHECK: [[IDX1:%.+]] = mul nsw i64 0, [[A_VAL]]
+// CHECK: [[START:%.+]] = getelementptr inbounds i32, i32* %{{.+}}, i64 [[IDX1]]
+// CHECK: [[START1:%.+]] = getelementptr inbounds i32, i32* [[START]], i64 3
+// CHECK: [[NEW_A_VAL:%.+]] = load i32, i32* @{{.+}},
+// CHECK: [[NEW_A_VAL_I64:%.+]] = sext i32 [[NEW_A_VAL]] to i64
+// CHECK: [[SUB:%.+]] = sub nsw i64 [[NEW_A_VAL_I64]], 1
+// CHECK: [[IDX1:%.+]] = mul nsw i64 [[SUB]], [[A_VAL]]
+// CHECK: [[END:%.+]] = getelementptr inbounds i32, i32* %{{.+}}, i64 [[IDX1]]
+// CHECK: [[NEW_A_VAL:%.+]] = load i32, i32* @{{.+}},
+// CHECK: [[NEW_A_VAL_I64:%.+]] = sext i32 [[NEW_A_VAL]] to i64
+// CHECK: [[IDX2:%.+]] = sub nsw i64 [[NEW_A_VAL_I64]], 1
+// CHECK: [[END1:%.+]] = getelementptr inbounds i32, i32* [[END]], i64 [[IDX2]]
+// CHECK: [[END2:%.+]] = getelementptr i32, i32* [[END1]], i32 1
+// CHECK: [[START_INT:%.+]] = ptrtoint i32* [[START1]] to i64
+// CHECK: [[END_INT:%.+]] = ptrtoint i32* [[END2]] to i64
+// CHECK: [[SIZEOF:%.+]] = sub nuw i64 [[END_INT]], [[START_INT]]
+// CHECK: getelementptr inbounds [3 x [[KMP_DEPEND_INFO]]], [3 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 2
+// CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 0
+// CHECK: ptrtoint i32* [[START1]] to i64
+// CHECK: store i64 %{{[^,]+}}, i64*
+// CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 1
+// CHECK: store i64 [[SIZEOF]], i64*
+// CHECK: getelementptr inbounds [[KMP_DEPEND_INFO]], [[KMP_DEPEND_INFO]]* %{{[^,]+}}, i32 0, i32 2
+// CHECK: store i8 3, i8*
+// CHECK: getelementptr inbounds [3 x [[KMP_DEPEND_INFO]]], [3 x [[KMP_DEPEND_INFO]]]* %{{[^,]+}}, i32 0, i32 0
 // CHECK: bitcast [[KMP_DEPEND_INFO]]* %{{.+}} to i8*
-// CHECK: call i32 @__kmpc_omp_task_with_deps([[IDENT_T]]* @{{.+}}, i32 [[GTID]], i8* [[ORIG_TASK_PTR]], i32 2, i8* %{{[^,]+}}, i32 0, i8* null)
-#pragma omp task final(true) depend(inout: a, s[1])
+// CHECK: call i32 @__kmpc_omp_task_with_deps([[IDENT_T]]* @{{.+}}, i32 [[GTID]], i8* [[ORIG_TASK_PTR]], i32 3, i8* %{{[^,]+}}, i32 0, i8* null)
+#pragma omp task final(true) depend(inout: a, s[1], arr[:a][3:])
   {
     a = 2;
   }