[clang] fb80e67 - [OPENMP50]Codegen for scan directive in simd loops.
Alexey Bataev via cfe-commits
cfe-commits at lists.llvm.org
Thu Jun 11 06:08:30 PDT 2020
Author: Alexey Bataev
Date: 2020-06-11T09:01:23-04:00
New Revision: fb80e67f10eea7177b0ff9c618c8231363b6f2fc
URL: https://github.com/llvm/llvm-project/commit/fb80e67f10eea7177b0ff9c618c8231363b6f2fc
DIFF: https://github.com/llvm/llvm-project/commit/fb80e67f10eea7177b0ff9c618c8231363b6f2fc.diff
LOG: [OPENMP50]Codegen for scan directive in simd loops.
Added codegen for scandirectives in simd loop. The codegen transforms
original code:
```
int x = 0;
#pragma omp simd reduction(inscan, +: x)
for (..) {
<first part>
#pragma omp scan inclusive(x)
<second part>
}
```
into
```
int x = 0;
for (..) {
int x_priv = 0;
<first part>
x = x_priv + x;
x_priv = x;
<second part>
}
```
and
```
int x = 0;
#pragma omp simd reduction(inscan, +: x)
for (..) {
<first part>
#pragma omp scan exclusive(x)
<second part>
}
```
into
```
int x = 0;
for (..) {
int x_priv = 0;
<second part>
int temp = x;
x = x_priv + x;
x_priv = temp;
<first part>
}
```
Differential revision: https://reviews.llvm.org/D78232
Added:
clang/test/OpenMP/scan_codegen.cpp
Modified:
clang/lib/CodeGen/CGStmtOpenMP.cpp
clang/lib/Sema/SemaOpenMP.cpp
Removed:
################################################################################
diff --git a/clang/lib/CodeGen/CGStmtOpenMP.cpp b/clang/lib/CodeGen/CGStmtOpenMP.cpp
index 664aeccfe7b9..a94cca758b22 100644
--- a/clang/lib/CodeGen/CGStmtOpenMP.cpp
+++ b/clang/lib/CodeGen/CGStmtOpenMP.cpp
@@ -2075,6 +2075,15 @@ void CodeGenFunction::EmitOMPSimdInit(const OMPLoopDirective &D,
if (const auto *C = D.getSingleClause<OMPOrderClause>())
if (C->getKind() == OMPC_ORDER_concurrent)
LoopStack.setParallel(/*Enable=*/true);
+ if ((D.getDirectiveKind() == OMPD_simd ||
+ (getLangOpts().OpenMPSimd &&
+ isOpenMPSimdDirective(D.getDirectiveKind()))) &&
+ llvm::any_of(D.getClausesOfKind<OMPReductionClause>(),
+ [](const OMPReductionClause *C) {
+ return C->getModifier() == OMPC_REDUCTION_inscan;
+ }))
+ // Disable parallel access in case of prefix sum.
+ LoopStack.setParallel(/*Enable=*/false);
}
void CodeGenFunction::EmitOMPSimdFinal(
@@ -2270,6 +2279,8 @@ static void emitOMPSimdRegion(CodeGenFunction &CGF, const OMPLoopDirective &S,
}
void CodeGenFunction::EmitOMPSimdDirective(const OMPSimdDirective &S) {
+ ParentLoopDirectiveForScanRegion ScanRegion(*this, S);
+ OMPFirstScanLoop = true;
auto &&CodeGen = [&S](CodeGenFunction &CGF, PrePostActionTy &Action) {
emitOMPSimdRegion(CGF, S, Action);
};
@@ -4191,14 +4202,15 @@ void CodeGenFunction::EmitOMPDepobjDirective(const OMPDepobjDirective &S) {
}
void CodeGenFunction::EmitOMPScanDirective(const OMPScanDirective &S) {
- // Do not emit code for non-simd directives in simd-only mode.
- if (getLangOpts().OpenMPSimd && !OMPParentLoopDirectiveForScan)
+ if (!OMPParentLoopDirectiveForScan)
return;
const OMPExecutableDirective &ParentDir = *OMPParentLoopDirectiveForScan;
+ bool IsInclusive = S.hasClausesOfKind<OMPInclusiveClause>();
SmallVector<const Expr *, 4> Shareds;
SmallVector<const Expr *, 4> Privates;
SmallVector<const Expr *, 4> LHSs;
SmallVector<const Expr *, 4> RHSs;
+ SmallVector<const Expr *, 4> ReductionOps;
SmallVector<const Expr *, 4> CopyOps;
SmallVector<const Expr *, 4> CopyArrayTemps;
SmallVector<const Expr *, 4> CopyArrayElems;
@@ -4209,13 +4221,109 @@ void CodeGenFunction::EmitOMPScanDirective(const OMPScanDirective &S) {
Privates.append(C->privates().begin(), C->privates().end());
LHSs.append(C->lhs_exprs().begin(), C->lhs_exprs().end());
RHSs.append(C->rhs_exprs().begin(), C->rhs_exprs().end());
+ ReductionOps.append(C->reduction_ops().begin(), C->reduction_ops().end());
CopyOps.append(C->copy_ops().begin(), C->copy_ops().end());
CopyArrayTemps.append(C->copy_array_temps().begin(),
C->copy_array_temps().end());
CopyArrayElems.append(C->copy_array_elems().begin(),
C->copy_array_elems().end());
}
- bool IsInclusive = S.hasClausesOfKind<OMPInclusiveClause>();
+ if (ParentDir.getDirectiveKind() == OMPD_simd ||
+ (getLangOpts().OpenMPSimd &&
+ isOpenMPSimdDirective(ParentDir.getDirectiveKind()))) {
+ // For simd directive and simd-based directives in simd only mode, use the
+ // following codegen:
+ // int x = 0;
+ // #pragma omp simd reduction(inscan, +: x)
+ // for (..) {
+ // <first part>
+ // #pragma omp scan inclusive(x)
+ // <second part>
+ // }
+ // is transformed to:
+ // int x = 0;
+ // for (..) {
+ // int x_priv = 0;
+ // <first part>
+ // x = x_priv + x;
+ // x_priv = x;
+ // <second part>
+ // }
+ // and
+ // int x = 0;
+ // #pragma omp simd reduction(inscan, +: x)
+ // for (..) {
+ // <first part>
+ // #pragma omp scan exclusive(x)
+ // <second part>
+ // }
+ // to
+ // int x = 0;
+ // for (..) {
+ // int x_priv = 0;
+ // <second part>
+ // int temp = x;
+ // x = x_priv + x;
+ // x_priv = temp;
+ // <first part>
+ // }
+ llvm::BasicBlock *OMPScanReduce = createBasicBlock("omp.inscan.reduce");
+ EmitBranch(IsInclusive
+ ? OMPScanReduce
+ : BreakContinueStack.back().ContinueBlock.getBlock());
+ EmitBlock(OMPScanDispatch);
+ {
+ // New scope for correct construction/destruction of temp variables for
+ // exclusive scan.
+ LexicalScope Scope(*this, S.getSourceRange());
+ EmitBranch(IsInclusive ? OMPBeforeScanBlock : OMPAfterScanBlock);
+ EmitBlock(OMPScanReduce);
+ if (!IsInclusive) {
+ // Create temp var and copy LHS value to this temp value.
+ // TMP = LHS;
+ for (unsigned I = 0, E = CopyArrayElems.size(); I < E; ++I) {
+ const Expr *PrivateExpr = Privates[I];
+ const Expr *TempExpr = CopyArrayTemps[I];
+ EmitAutoVarDecl(
+ *cast<VarDecl>(cast<DeclRefExpr>(TempExpr)->getDecl()));
+ LValue DestLVal = EmitLValue(TempExpr);
+ LValue SrcLVal = EmitLValue(LHSs[I]);
+ EmitOMPCopy(PrivateExpr->getType(), DestLVal.getAddress(*this),
+ SrcLVal.getAddress(*this),
+ cast<VarDecl>(cast<DeclRefExpr>(LHSs[I])->getDecl()),
+ cast<VarDecl>(cast<DeclRefExpr>(RHSs[I])->getDecl()),
+ CopyOps[I]);
+ }
+ }
+ CGM.getOpenMPRuntime().emitReduction(
+ *this, ParentDir.getEndLoc(), Privates, LHSs, RHSs, ReductionOps,
+ {/*WithNowait=*/true, /*SimpleReduction=*/true, OMPD_simd});
+ for (unsigned I = 0, E = CopyArrayElems.size(); I < E; ++I) {
+ const Expr *PrivateExpr = Privates[I];
+ LValue DestLVal;
+ LValue SrcLVal;
+ if (IsInclusive) {
+ DestLVal = EmitLValue(RHSs[I]);
+ SrcLVal = EmitLValue(LHSs[I]);
+ } else {
+ const Expr *TempExpr = CopyArrayTemps[I];
+ DestLVal = EmitLValue(RHSs[I]);
+ SrcLVal = EmitLValue(TempExpr);
+ }
+ EmitOMPCopy(PrivateExpr->getType(), DestLVal.getAddress(*this),
+ SrcLVal.getAddress(*this),
+ cast<VarDecl>(cast<DeclRefExpr>(LHSs[I])->getDecl()),
+ cast<VarDecl>(cast<DeclRefExpr>(RHSs[I])->getDecl()),
+ CopyOps[I]);
+ }
+ }
+ EmitBranch(IsInclusive ? OMPAfterScanBlock : OMPBeforeScanBlock);
+ OMPScanExitBlock = IsInclusive
+ ? BreakContinueStack.back().ContinueBlock.getBlock()
+ : OMPScanReduce;
+ EmitBlock(OMPAfterScanBlock);
+ return;
+ }
if (!IsInclusive) {
EmitBranch(BreakContinueStack.back().ContinueBlock.getBlock());
EmitBlock(OMPScanExitBlock);
@@ -6313,6 +6421,7 @@ void CodeGenFunction::EmitSimpleOMPExecutableDirective(
}
if (isOpenMPSimdDirective(D.getDirectiveKind())) {
(void)GlobalsScope.Privatize();
+ ParentLoopDirectiveForScanRegion ScanRegion(CGF, D);
emitOMPSimdRegion(CGF, cast<OMPLoopDirective>(D), Action);
} else {
if (const auto *LD = dyn_cast<OMPLoopDirective>(&D)) {
diff --git a/clang/lib/Sema/SemaOpenMP.cpp b/clang/lib/Sema/SemaOpenMP.cpp
index c689280e0ccd..3235d1d1ebb6 100644
--- a/clang/lib/Sema/SemaOpenMP.cpp
+++ b/clang/lib/Sema/SemaOpenMP.cpp
@@ -15150,24 +15150,37 @@ static bool actOnOMPReductionKindClause(
S.ActOnFinishFullExpr(CopyOpRes.get(), /*DiscardedValue=*/true);
if (!CopyOpRes.isUsable())
continue;
- // Build temp array for prefix sum.
- auto *Dim = new (S.Context)
- OpaqueValueExpr(ELoc, S.Context.getSizeType(), VK_RValue);
- QualType ArrayTy =
- S.Context.getVariableArrayType(PrivateTy, Dim, ArrayType::Normal,
- /*IndexTypeQuals=*/0, {ELoc, ELoc});
- VarDecl *TempArrayVD =
- buildVarDecl(S, ELoc, ArrayTy, D->getName(),
- D->hasAttrs() ? &D->getAttrs() : nullptr);
- // Add a constructor to the temp decl.
- S.ActOnUninitializedDecl(TempArrayVD);
- TempArrayRes = buildDeclRefExpr(S, TempArrayVD, ArrayTy, ELoc);
- TempArrayElem =
- S.DefaultFunctionArrayLvalueConversion(TempArrayRes.get());
- auto *Idx = new (S.Context)
- OpaqueValueExpr(ELoc, S.Context.getSizeType(), VK_RValue);
- TempArrayElem = S.CreateBuiltinArraySubscriptExpr(TempArrayElem.get(),
- ELoc, Idx, ELoc);
+ // For simd directive and simd-based directives in simd mode no need to
+ // construct temp array, need just a single temp element.
+ if (Stack->getCurrentDirective() == OMPD_simd ||
+ (S.getLangOpts().OpenMPSimd &&
+ isOpenMPSimdDirective(Stack->getCurrentDirective()))) {
+ VarDecl *TempArrayVD =
+ buildVarDecl(S, ELoc, PrivateTy, D->getName(),
+ D->hasAttrs() ? &D->getAttrs() : nullptr);
+ // Add a constructor to the temp decl.
+ S.ActOnUninitializedDecl(TempArrayVD);
+ TempArrayRes = buildDeclRefExpr(S, TempArrayVD, PrivateTy, ELoc);
+ } else {
+ // Build temp array for prefix sum.
+ auto *Dim = new (S.Context)
+ OpaqueValueExpr(ELoc, S.Context.getSizeType(), VK_RValue);
+ QualType ArrayTy =
+ S.Context.getVariableArrayType(PrivateTy, Dim, ArrayType::Normal,
+ /*IndexTypeQuals=*/0, {ELoc, ELoc});
+ VarDecl *TempArrayVD =
+ buildVarDecl(S, ELoc, ArrayTy, D->getName(),
+ D->hasAttrs() ? &D->getAttrs() : nullptr);
+ // Add a constructor to the temp decl.
+ S.ActOnUninitializedDecl(TempArrayVD);
+ TempArrayRes = buildDeclRefExpr(S, TempArrayVD, ArrayTy, ELoc);
+ TempArrayElem =
+ S.DefaultFunctionArrayLvalueConversion(TempArrayRes.get());
+ auto *Idx = new (S.Context)
+ OpaqueValueExpr(ELoc, S.Context.getSizeType(), VK_RValue);
+ TempArrayElem = S.CreateBuiltinArraySubscriptExpr(TempArrayElem.get(),
+ ELoc, Idx, ELoc);
+ }
}
// OpenMP [2.15.4.6, Restrictions, p.2]
diff --git a/clang/test/OpenMP/scan_codegen.cpp b/clang/test/OpenMP/scan_codegen.cpp
new file mode 100644
index 000000000000..3dc9c232974e
--- /dev/null
+++ b/clang/test/OpenMP/scan_codegen.cpp
@@ -0,0 +1,277 @@
+// RUN: %clang_cc1 -verify -fopenmp -fopenmp-version=50 -x c++ -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck %s
+// RUN: %clang_cc1 -fopenmp -fopenmp-version=50 -x c++ -triple x86_64-unknown-unknown -emit-pch -o %t %s
+// RUN: %clang_cc1 -fopenmp -fopenmp-version=50 -x c++ -triple x86_64-unknown-unknown -include-pch %t -verify %s -emit-llvm -o - | FileCheck %s
+
+// RUN: %clang_cc1 -verify -fopenmp-simd -fopenmp-version=50 -x c++ -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck --check-prefix SIMD-ONLY0 %s
+// RUN: %clang_cc1 -fopenmp-simd -fopenmp-version=50 -x c++ -triple x86_64-unknown-unknown -emit-pch -o %t %s
+// RUN: %clang_cc1 -fopenmp-simd -fopenmp-version=50 -x c++ -triple x86_64-unknown-unknown -include-pch %t -verify %s -emit-llvm -o - | FileCheck --check-prefix SIMD-ONLY0 %s
+// SIMD-ONLY0-NOT: {{__kmpc|__tgt}}
+//
+// expected-no-diagnostics
+#ifndef HEADER
+#define HEADER
+void foo();
+void bar();
+
+// CHECK-LABEL: baz
+void baz() {
+ int a = 0;
+
+ // CHECK: store i32 0, i32* [[A_ADDR:%.+]],
+ // CHECK: store i32 0, i32* [[OMP_CNT:%.+]],
+ // CHECK: br label %[[OMP_HEADER:.+]]
+
+ // CHECK: [[OMP_HEADER]]:
+ // CHECK: [[CNT_VAL:%.+]] = load i32, i32* [[OMP_CNT]],
+ // CHECK: [[CMP:%.+]] = icmp slt i32 [[CNT_VAL]], 10
+ // CHECK: br i1 [[CMP]], label %[[OMP_BODY:.+]], label %[[OMP_END:.+]]
+#pragma omp simd reduction(inscan, + : a)
+ for (int i = 0; i < 10; ++i) {
+ // CHECK: [[OMP_BODY]]:
+
+ // i = OMP_CNT*1 + 0;
+ // CHECK: [[CNT_VAL:%.+]] = load i32, i32* [[OMP_CNT]],
+ // CHECK: [[MUL:%.+]] = mul nsw i32 [[CNT_VAL]], 1
+ // CHECK: [[ADD:%.+]] = add nsw i32 0, [[MUL]]
+ // CHECK: store i32 [[ADD]], i32* [[I_ADDR:%.+]],
+
+ // A_PRIV = 0;
+ // CHECK: store i32 0, i32* [[A_PRIV_ADDR:%.+]],
+
+ // goto DISPATCH;
+ // CHECK: br label %[[DISPATCH:[^,]+]]
+
+ // INPUT_PHASE:
+ // foo();
+ // goto REDUCE;
+ // CHECK: [[INPUT_PHASE:.+]]:
+ // CHECK: call void @{{.*}}foo{{.*}}()
+ // CHECK: br label %[[REDUCE:[^,]+]]
+ foo();
+
+ // DISPATCH:
+ // goto INPUT_PHASE;
+ // CHECK: [[DISPATCH]]:
+ // CHECK: br label %[[INPUT_PHASE]]
+
+ // REDUCE:
+ // A = A_PRIV + A;
+ // A_PRIV = A;
+ // goto SCAN_PHASE;
+ // CHECK: [[REDUCE]]:
+ // CHECK: [[A:%.+]] = load i32, i32* [[A_ADDR]],
+ // CHECK: [[A_PRIV:%.+]] = load i32, i32* [[A_PRIV_ADDR]],
+ // CHECK: [[SUM:%.+]] = add nsw i32 [[A]], [[A_PRIV]]
+ // CHECK: store i32 [[SUM]], i32* [[A_ADDR]],
+ // CHECK: [[A:%.+]] = load i32, i32* [[A_ADDR]],
+ // CHECK: store i32 [[A]], i32* [[A_PRIV_ADDR]],
+ // CHECK: br label %[[SCAN_PHASE:[^,]+]]
+#pragma omp scan inclusive(a)
+
+ // SCAN_PHASE:
+ // bar();
+ // goto CONTINUE;
+ // CHECK: [[SCAN_PHASE]]:
+ // CHECK: call void @{{.*}}bar{{.*}}()
+ // CHECK: br label %[[CONTINUE:[^,]+]]
+ bar();
+
+ // CHECK: [[CONTINUE]]:
+ // CHECK: br label %[[INC_BLOCK:[^,]+]]
+
+ // ++OMP_CNT;
+ // CHECK: [[INC_BLOCK]]:
+ // CHECK: [[CNT:%.+]] = load i32, i32* [[OMP_CNT]],
+ // CHECK: [[INC:%.+]] = add nsw i32 [[CNT]], 1
+ // CHECK: store i32 [[INC]], i32* [[OMP_CNT]],
+ // CHECK: br label %[[OMP_HEADER]]
+ }
+ // CHECK: [[OMP_END]]:
+}
+
+struct S {
+ int a;
+ S() {}
+ ~S() {}
+ S& operator+(const S&);
+ S& operator=(const S&);
+};
+
+// CHECK-LABEL: xyz
+void xyz() {
+ S s[2];
+
+ // CHECK: [[S_BEGIN:%.+]] = getelementptr inbounds [2 x %struct.S], [2 x %struct.S]* [[S_ADDR:%.+]], i{{.+}} 0, i{{.+}} 0
+ // CHECK: [[S_END:%.+]] = getelementptr {{.*}}%struct.S, %struct.S* [[S_BEGIN]], i{{.+}} 2
+ // CHECK: br label %[[ARRAY_INIT:.+]]
+ // CHECK: [[ARRAY_INIT]]:
+ // CHECK: [[S_CUR:%.+]] = phi %struct.S* [ [[S_BEGIN]], %{{.+}} ], [ [[S_NEXT:%.+]], %[[ARRAY_INIT]] ]
+ // CHECK: call void [[CONSTR:@.+]](%struct.S* [[S_CUR]])
+ // CHECK: [[S_NEXT]] = getelementptr inbounds %struct.S, %struct.S* [[S_CUR]], i{{.+}} 1
+ // CHECK: [[IS_DONE:%.+]] = icmp eq %struct.S* [[S_NEXT]], [[S_END]]
+ // CHECK: br i1 [[IS_DONE]], label %[[DONE:.+]], label %[[ARRAY_INIT]]
+ // CHECK: [[DONE]]:
+ // CHECK: store i32 0, i32* [[OMP_CNT:%.+]],
+ // CHECK: br label %[[OMP_HEADER:.+]]
+
+ // CHECK: [[OMP_HEADER]]:
+ // CHECK: [[CNT_VAL:%.+]] = load i32, i32* [[OMP_CNT]],
+ // CHECK: [[CMP:%.+]] = icmp slt i32 [[CNT_VAL]], 10
+ // CHECK: br i1 [[CMP]], label %[[OMP_BODY:.+]], label %[[OMP_END:.+]]
+#pragma omp simd reduction(inscan, + : s)
+ for (int i = 0; i < 10; ++i) {
+ // CHECK: [[OMP_BODY]]:
+
+ // i = OMP_CNT*1 + 0;
+ // CHECK: [[CNT_VAL:%.+]] = load i32, i32* [[OMP_CNT]],
+ // CHECK: [[MUL:%.+]] = mul nsw i32 [[CNT_VAL]], 1
+ // CHECK: [[ADD:%.+]] = add nsw i32 0, [[MUL]]
+ // CHECK: store i32 [[ADD]], i32* [[I_ADDR:%.+]],
+
+ // S S_PRIV[2];
+ // CHECK: [[S_BEGIN:%.+]] = getelementptr inbounds [2 x %struct.S], [2 x %struct.S]* [[S_PRIV_ADDR:%.+]], i{{.+}} 0, i{{.+}} 0
+ // CHECK: [[S_END:%.+]] = getelementptr {{.*}}%struct.S, %struct.S* [[S_BEGIN]], i{{.+}} 2
+ // CHECK: [[IS_DONE:%.+]] = icmp eq %struct.S* [[S_BEGIN]], [[S_END]]
+ // CHECK: br i1 [[IS_DONE]], label %[[DONE:.+]], label %[[ARRAY_INIT:[^,]+]]
+ // CHECK: [[ARRAY_INIT]]:
+ // CHECK: [[S_CUR:%.+]] = phi %struct.S* [ [[S_BEGIN]], %[[OMP_BODY]] ], [ [[S_NEXT:%.+]], %[[ARRAY_INIT]] ]
+ // CHECK: call void [[CONSTR]](%struct.S* [[S_CUR]])
+ // CHECK: [[S_NEXT]] = getelementptr {{.*}}%struct.S, %struct.S* [[S_CUR]], i{{.+}} 1
+ // CHECK: [[IS_DONE:%.+]] = icmp eq %struct.S* [[S_NEXT]], [[S_END]]
+ // CHECK: br i1 [[IS_DONE]], label %[[DONE:.+]], label %[[ARRAY_INIT]]
+ // CHECK: [[DONE]]:
+ // CHECK: [[LHS_BEGIN:%.+]] = bitcast [2 x %struct.S]* [[S_ADDR]] to %struct.S*
+ // CHECK: [[RHS_BEGIN:%.+]] = bitcast [2 x %struct.S]* [[S_PRIV_ADDR]] to %struct.S*
+
+ // goto DISPATCH;
+ // CHECK: br label %[[DISPATCH:[^,]+]]
+
+ // SCAN_PHASE:
+ // foo();
+ // goto CONTINUE;
+ // CHECK: [[SCAN_PHASE:.+]]:
+ // CHECK: call void @{{.*}}foo{{.*}}()
+ // CHECK: br label %[[CONTINUE:[^,]+]]
+ foo();
+
+ // DISPATCH:
+ // goto INPUT_PHASE;
+ // CHECK: [[DISPATCH]]:
+ // CHECK: br label %[[INPUT_PHASE:[^,]+]]
+
+ // REDUCE:
+ // TEMP = S;
+ // S = S_PRIV + S;
+ // S_PRIV = TEMP;
+ // goto SCAN_PHASE;
+ // CHECK: [[REDUCE:.+]]:
+
+ // S TEMP[2];
+ // CHECK: [[TEMP_ARR_BEG:%.+]] = getelementptr inbounds [2 x %struct.S], [2 x %struct.S]* [[TEMP_ARR:%.+]], i32 0, i32 0
+ // CHECK: [[TEMP_ARR_END:%.+]] = getelementptr inbounds %struct.S, %struct.S* [[TEMP_ARR_BEG]], i64 2
+ // CHECK: br label %[[BODY:[^,]+]]
+ // CHECK: [[BODY]]:
+ // CHECK: [[CUR:%.+]] = phi %struct.S* [ [[TEMP_ARR_BEG]], %[[REDUCE]] ], [ [[NEXT:%.+]], %[[BODY]] ]
+ // CHECK: call void [[CONSTR]](%struct.S* [[CUR]])
+ // CHECK: [[NEXT]] = getelementptr inbounds %struct.S, %struct.S* [[CUR]], i64 1
+ // CHECK: [[IS_DONE:%.+]] = icmp eq %struct.S* [[NEXT]], [[TEMP_ARR_END]]
+ // CHECK: br i1 [[IS_DONE]], label %[[EXIT:[^,]+]], label %[[BODY]]
+ // CHECK: [[EXIT]]:
+
+ // TEMP = S;
+ // CHECK: [[TEMP_ARR_BEG:%.+]] = getelementptr inbounds [2 x %struct.S], [2 x %struct.S]* [[TEMP_ARR]], i32 0, i32 0
+ // CHECK: [[TEMP_ARR_END:%.+]] = getelementptr %struct.S, %struct.S* [[TEMP_ARR_BEG]], i64 2
+ // CHECK: [[IS_EMPTY:%.+]] = icmp eq %struct.S* [[TEMP_ARR_BEG]], [[TEMP_ARR_END]]
+ // CHECK: br i1 [[IS_EMPTY]], label %[[EXIT:[^,]+]], label %[[BODY:[^,]+]]
+ // CHECK: [[BODY]]:
+ // CHECK: [[CUR_SRC:%.+]] = phi %struct.S* [ [[LHS_BEGIN]], %{{.+}} ], [ [[SRC_NEXT:%.+]], %[[BODY]] ]
+ // CHECK: [[CUR_DEST:%.+]] = phi %struct.S* [ [[TEMP_ARR_BEG]], %{{.+}} ], [ [[DEST_NEXT:%.+]], %[[BODY]] ]
+ // CHECK: call {{.*}}%struct.S* [[S_COPY:@.+]](%struct.S* [[CUR_DEST]], %struct.S* {{.*}}[[CUR_SRC]])
+ // CHECK: [[DEST_NEXT:%.+]] = getelementptr %struct.S, %struct.S* [[CUR_DEST]], i32 1
+ // CHECK: [[SRC_NEXT:%.+]] = getelementptr %struct.S, %struct.S* [[CUR_SRC]], i32 1
+ // CHECK: [[IS_DONE:%.+]] = icmp eq %struct.S* [[DEST_NEXT]], [[TEMP_ARR_END]]
+ // CHECK: br i1 [[IS_DONE]], label %[[EXIT]], label %[[BODY]]
+ // CHECK: [[EXIT]]:
+
+ // S = S_PRIV + S;
+ // CHECK: [[LHS_END:%.+]] = getelementptr {{.*}}%struct.S, %struct.S* [[LHS_BEGIN]], i{{.+}} 2
+ // CHECK: [[IS_DONE:%.+]] = icmp eq %struct.S* [[LHS_BEGIN]], [[LHS_END]]
+ // CHECK: br i1 [[IS_DONE]], label %[[DONE:.+]], label %[[ARRAY_REDUCE_COPY:[^,]+]]
+ // CHECK: [[ARRAY_REDUCE_COPY]]:
+ // CHECK: [[SRC_CUR:%.+]] = phi %struct.S* [ [[RHS_BEGIN]], %[[EXIT]] ], [ [[SRC_NEXT:%.+]], %[[ARRAY_REDUCE_COPY]] ]
+ // CHECK: [[DEST_CUR:%.+]] = phi %struct.S* [ [[LHS_BEGIN]], %[[EXIT]] ], [ [[DEST_NEXT:%.+]], %[[ARRAY_REDUCE_COPY]] ]
+ // CHECK: [[SUM:%.+]] = call {{.*}}%struct.S* @{{.+}}(%struct.S* [[DEST_CUR]], %struct.S* {{.*}}[[SRC_CUR]])
+ // CHECK: call {{.*}}%struct.S* [[S_COPY]](%struct.S* [[DEST_CUR]], %struct.S* {{.*}}[[SUM]])
+ // CHECK: [[DEST_NEXT]] = getelementptr {{.*}}%struct.S, %struct.S* [[DEST_CUR]], i{{.+}} 1
+ // CHECK: [[SRC_NEXT]] = getelementptr {{.*}}%struct.S, %struct.S* [[SRC_CUR]], i{{.+}} 1
+ // CHECK: [[IS_DONE:%.+]] = icmp eq %struct.S* [[DEST_NEXT]], [[LHS_END]]
+ // CHECK: br i1 [[IS_DONE]], label %[[DONE:.+]], label %[[ARRAY_REDUCE_COPY]]
+ // CHECK: [[DONE]]:
+
+ // S_PRIV = TEMP;
+ // CHECK: [[TEMP_ARR_BEG:%.+]] = bitcast [2 x %struct.S]* [[TEMP_ARR]] to %struct.S*
+ // CHECK: [[RHS_END:%.+]] = getelementptr %struct.S, %struct.S* [[RHS_BEGIN]], i64 2
+ // CHECK: [[IS_EMPTY:%.+]] = icmp eq %struct.S* [[RHS_BEGIN]], [[RHS_END]]
+ // CHECK: br i1 [[IS_EMPTY]], label %[[EXIT:[^,]+]], label %[[BODY:[^,]+]]
+ // CHECK: [[BODY]]:
+ // CHECK: [[CUR_SRC:%.+]] = phi %struct.S* [ [[TEMP_ARR_BEG]], %[[DONE]] ], [ [[SRC_NEXT:%.+]], %[[BODY]] ]
+ // CHECK: [[CUR_DEST:%.+]] = phi %struct.S* [ [[RHS_BEGIN]], %[[DONE]] ], [ [[DEST_NEXT:%.+]], %[[BODY]] ]
+ // CHECK: call {{.*}}%struct.S* [[S_COPY]](%struct.S* [[CUR_DEST]], %struct.S* {{.*}}[[CUR_SRC]])
+ // CHECK: [[DEST_NEXT]] = getelementptr %struct.S, %struct.S* [[CUR_DEST]], i32 1
+ // CHECK: [[SRC_NEXT]] = getelementptr %struct.S, %struct.S* [[CUR_SRC]], i32 1
+ // CHECK: [[IS_DONE:%.+]] = icmp eq %struct.S* [[DEST_NEXT]], [[RHS_END]]
+ // CHECK: br i1 [[IS_DONE]], label %[[DONE:[^,]+]], label %[[BODY]]
+ // CHECK: [[DONE]]:
+
+ // TEMP.~S()
+ // CHECK: [[TEMP_ARR_BEG:%.+]] = getelementptr inbounds [2 x %struct.S], [2 x %struct.S]* [[TEMP_ARR]], i32 0, i32 0
+ // CHECK: [[TEMP_ARR_END:%.+]] = getelementptr inbounds %struct.S, %struct.S* [[TEMP_ARR_BEG]], i64 2
+ // CHECK: br label %[[BODY:[^,]+]]
+ // CHECK: [[BODY]]:
+ // CHECK: [[CUR:%.+]] = phi %struct.S* [ [[TEMP_ARR_END]], %[[DONE]] ], [ [[PREV:%.+]], %[[BODY]] ]
+ // CHECK: [[PREV]] = getelementptr inbounds %struct.S, %struct.S* [[CUR]], i64 -1
+ // CHECK: call void [[DESTR:@.+]](%struct.S* [[PREV]])
+ // CHECK: [[IS_DONE:%.+]] = icmp eq %struct.S* [[PREV]], [[TEMP_ARR_BEG]]
+ // CHECK: br i1 [[IS_DONE]], label %[[EXIT:[^,]+]], label %[[BODY]]
+ // CHECK: [[EXIT]]:
+
+ // goto SCAN_PHASE;
+ // CHECK: br label %[[SCAN_PHASE]]
+#pragma omp scan exclusive(s)
+
+ // INPUT_PHASE:
+ // bar();
+ // goto REDUCE;
+ // CHECK: [[INPUT_PHASE]]:
+ // CHECK: call void @{{.*}}bar{{.*}}()
+ // CHECK: br label %[[REDUCE]]
+ bar();
+
+ // CHECK: [[CONTINUE]]:
+
+ // S_PRIV[2].~S();
+ // CHECK: [[S_BEGIN:%.+]] = getelementptr inbounds [2 x %struct.S], [2 x %struct.S]* [[S_PRIV_ADDR]], i{{.+}} 0, i{{.+}} 0
+ // CHECK: [[S_END:%.+]] = getelementptr {{.*}}%struct.S, %struct.S* [[S_BEGIN]], i{{.+}} 2
+ // CHECK: br label %[[ARRAY_DESTR:[^,]+]]
+ // CHECK: [[ARRAY_DESTR]]:
+ // CHECK: [[S_CUR:%.+]] = phi %struct.S* [ [[S_END]], %[[CONTINUE]] ], [ [[S_PREV:%.+]], %[[ARRAY_DESTR]] ]
+ // CHECK: [[S_PREV]] = getelementptr {{.*}}%struct.S, %struct.S* [[S_CUR]], i{{.+}} -1
+ // CHECK: call void [[DESTR]](%struct.S* [[S_PREV]])
+ // CHECK: [[IS_DONE:%.+]] = icmp eq %struct.S* [[S_PREV]], [[S_BEGIN]]
+ // CHECK: br i1 [[IS_DONE]], label %[[DONE:.+]], label %[[ARRAY_DESTR]]
+ // CHECK: [[DONE]]:
+ // CHECK: br label %[[INC_BLOCK:[^,]+]]
+
+ // ++OMP_CNT;
+ // CHECK: [[INC_BLOCK]]:
+ // CHECK: [[CNT:%.+]] = load i32, i32* [[OMP_CNT]],
+ // CHECK: [[INC:%.+]] = add nsw i32 [[CNT]], 1
+ // CHECK: store i32 [[INC]], i32* [[OMP_CNT]],
+ // CHECK: br label %[[OMP_HEADER]]
+ }
+ // CHECK: [[OMP_END]]:
+}
+
+// CHECK-NOT: !{!"llvm.loop.parallel_accesses"
+
+#endif // HEADER
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