1 //===--- CGStmtOpenMP.cpp - Emit LLVM Code from Statements ----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This contains code to emit OpenMP nodes as LLVM code.
12 //===----------------------------------------------------------------------===//
14 #include "CGOpenMPRuntime.h"
15 #include "CodeGenFunction.h"
16 #include "CodeGenModule.h"
17 #include "clang/AST/Stmt.h"
18 #include "clang/AST/StmtOpenMP.h"
19 using namespace clang;
20 using namespace CodeGen;
22 //===----------------------------------------------------------------------===//
23 // OpenMP Directive Emission
24 //===----------------------------------------------------------------------===//
26 void CodeGenFunction::EmitOMPParallelDirective(const OMPParallelDirective &S) {
27 const CapturedStmt *CS = cast<CapturedStmt>(S.getAssociatedStmt());
28 llvm::Value *CapturedStruct = GenerateCapturedStmtArgument(*CS);
30 llvm::Value *OutlinedFn;
32 CodeGenFunction CGF(CGM, true);
33 CGCapturedStmtInfo CGInfo(*CS, CS->getCapturedRegionKind());
34 CGF.CapturedStmtInfo = &CGInfo;
35 OutlinedFn = CGF.GenerateCapturedStmtFunction(*CS);
38 // Build call __kmpc_fork_call(loc, 1, microtask, captured_struct/*context*/)
39 llvm::Value *Args[] = {
40 CGM.getOpenMPRuntime().EmitOpenMPUpdateLocation(*this, S.getLocStart()),
41 Builder.getInt32(1), // Number of arguments after 'microtask' argument
42 // (there is only one additional argument - 'context')
43 Builder.CreateBitCast(OutlinedFn,
44 CGM.getOpenMPRuntime().getKmpc_MicroPointerTy()),
45 EmitCastToVoidPtr(CapturedStruct)};
46 llvm::Constant *RTLFn = CGM.getOpenMPRuntime().CreateRuntimeFunction(
47 CGOpenMPRuntime::OMPRTL__kmpc_fork_call);
48 EmitRuntimeCall(RTLFn, Args);
51 void CodeGenFunction::EmitOMPSimdDirective(const OMPSimdDirective &S) {
52 const CapturedStmt *CS = cast<CapturedStmt>(S.getAssociatedStmt());
53 const Stmt *Body = CS->getCapturedStmt();
54 LoopStack.setParallel();
55 LoopStack.setVectorizerEnable(true);
56 for (auto C : S.clauses()) {
57 switch (C->getClauseKind()) {
59 RValue Len = EmitAnyExpr(cast<OMPSafelenClause>(C)->getSafelen(),
60 AggValueSlot::ignored(), true);
61 llvm::ConstantInt *Val = cast<llvm::ConstantInt>(Len.getScalarVal());
62 LoopStack.setVectorizerWidth(Val->getZExtValue());
63 // In presence of finite 'safelen', it may be unsafe to mark all
64 // the memory instructions parallel, because loop-carried
65 // dependences of 'safelen' iterations are possible.
66 LoopStack.setParallel(false);
77 void CodeGenFunction::EmitOMPForDirective(const OMPForDirective &) {
78 llvm_unreachable("CodeGen for 'omp for' is not supported yet.");
81 void CodeGenFunction::EmitOMPSectionsDirective(const OMPSectionsDirective &) {
82 llvm_unreachable("CodeGen for 'omp sections' is not supported yet.");
85 void CodeGenFunction::EmitOMPSectionDirective(const OMPSectionDirective &) {
86 llvm_unreachable("CodeGen for 'omp section' is not supported yet.");
89 void CodeGenFunction::EmitOMPSingleDirective(const OMPSingleDirective &) {
90 llvm_unreachable("CodeGen for 'omp single' is not supported yet.");
93 void CodeGenFunction::EmitOMPMasterDirective(const OMPMasterDirective &) {
94 llvm_unreachable("CodeGen for 'omp master' is not supported yet.");
97 void CodeGenFunction::EmitOMPCriticalDirective(const OMPCriticalDirective &) {
98 llvm_unreachable("CodeGen for 'omp critical' is not supported yet.");
102 CodeGenFunction::EmitOMPParallelForDirective(const OMPParallelForDirective &) {
103 llvm_unreachable("CodeGen for 'omp parallel for' is not supported yet.");
106 void CodeGenFunction::EmitOMPParallelSectionsDirective(
107 const OMPParallelSectionsDirective &) {
108 llvm_unreachable("CodeGen for 'omp parallel sections' is not supported yet.");
111 void CodeGenFunction::EmitOMPTaskDirective(const OMPTaskDirective &) {
112 llvm_unreachable("CodeGen for 'omp task' is not supported yet.");
115 void CodeGenFunction::EmitOMPTaskyieldDirective(const OMPTaskyieldDirective &) {
116 llvm_unreachable("CodeGen for 'omp taskyield' is not supported yet.");
119 void CodeGenFunction::EmitOMPBarrierDirective(const OMPBarrierDirective &) {
120 llvm_unreachable("CodeGen for 'omp barrier' is not supported yet.");
123 void CodeGenFunction::EmitOMPTaskwaitDirective(const OMPTaskwaitDirective &) {
124 llvm_unreachable("CodeGen for 'omp taskwait' is not supported yet.");
127 void CodeGenFunction::EmitOMPFlushDirective(const OMPFlushDirective &) {
128 llvm_unreachable("CodeGen for 'omp flush' is not supported yet.");