2377fe95c6
Currently all variables used in OpenMP regions are captured into a record and passed to outlined functions in this record. It may result in some poor performance because of too complex analysis later in optimization passes. Patch makes to emit outlined functions for parallel-based regions with a list of captured variables. It reduces code for 2*n GEPs, stores and loads at least. Codegen for task-based regions remains unchanged because runtime requires that all captured variables are passed in captured record. llvm-svn: 247251
99 lines
4.2 KiB
C++
99 lines
4.2 KiB
C++
// RUN: %clang_cc1 -verify -fopenmp -x c++ -emit-llvm -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -o - %s | FileCheck %s
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// RUN: %clang_cc1 -fopenmp -x c++ -std=c++11 -fexceptions -fcxx-exceptions -triple x86_64-unknown-unknown -emit-pch -o %t %s
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// RUN: %clang_cc1 -fopenmp -x c++ -std=c++11 -include-pch %t -fsyntax-only -verify %s -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -emit-llvm -o - | FileCheck %s
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// expected-no-diagnostics
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// REQUIRES: x86-registered-target
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#ifndef HEADER
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#define HEADER
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// CHECK: [[IMPLICIT_BARRIER_LOC:@.+]] = private unnamed_addr constant %{{.+}} { i32 0, i32 66, i32 0, i32 0, i8*
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// CHECK-LABEL: foo
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void foo() {};
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// CHECK-LABEL: bar
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void bar() {};
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template <class T>
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T tmain() {
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#pragma omp parallel sections
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{
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foo();
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}
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return T();
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}
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// CHECK-LABEL: @main
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int main() {
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// CHECK: call void (%{{.+}}*, i32, void (i32*, i32*, ...)*, ...) @__kmpc_fork_call(%{{.+}}* @{{.+}}, i32 0, void (i32*, i32*, ...)* bitcast (void (i32*, i32*)* [[OMP_PARALLEL_FUNC:@.+]] to void (i32*, i32*, ...)*))
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// CHECK-LABEL: }
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// CHECK: define internal void [[OMP_PARALLEL_FUNC]](i32* noalias [[GTID_PARAM_ADDR:%.+]], i32* noalias %{{.+}})
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// CHECK: store i32* [[GTID_PARAM_ADDR]], i32** [[GTID_REF_ADDR:%.+]],
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#pragma omp parallel sections
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{
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// CHECK: store i32 0, i32* [[LB_PTR:%.+]],
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// CHECK: store i32 1, i32* [[UB_PTR:%.+]],
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// CHECK: [[GTID_REF:%.+]] = load i32*, i32** [[GTID_REF_ADDR]],
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// CHECK: [[GTID:%.+]] = load i32, i32* [[GTID_REF]],
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// CHECK: call void @__kmpc_for_static_init_4(%{{.+}}* @{{.+}}, i32 [[GTID]], i32 34, i32* [[IS_LAST_PTR:%.+]], i32* [[LB_PTR]], i32* [[UB_PTR]], i32* [[STRIDE_PTR:%.+]], i32 1, i32 1)
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// <<UB = min(UB, GlobalUB);>>
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// CHECK: [[UB:%.+]] = load i32, i32* [[UB_PTR]]
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// CHECK: [[CMP:%.+]] = icmp slt i32 [[UB]], 1
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// CHECK: [[MIN_UB_GLOBALUB:%.+]] = select i1 [[CMP]], i32 [[UB]], i32 1
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// CHECK: store i32 [[MIN_UB_GLOBALUB]], i32* [[UB_PTR]]
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// <<IV = LB;>>
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// CHECK: [[LB:%.+]] = load i32, i32* [[LB_PTR]]
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// CHECK: store i32 [[LB]], i32* [[IV_PTR:%.+]]
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// CHECK: br label %[[INNER_FOR_COND:.+]]
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// CHECK: [[INNER_FOR_COND]]
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// <<IV <= UB?>>
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// CHECK: [[IV:%.+]] = load i32, i32* [[IV_PTR]]
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// CHECK: [[UB:%.+]] = load i32, i32* [[UB_PTR]]
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// CHECK: [[CMP:%.+]] = icmp sle i32 [[IV]], [[UB]]
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// CHECK: br i1 [[CMP]], label %[[INNER_LOOP_BODY:.+]], label %[[INNER_LOOP_END:.+]]
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// CHECK: [[INNER_LOOP_BODY]]
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// <<TRUE>> - > <BODY>
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// CHECK: [[IV:%.+]] = load i32, i32* [[IV_PTR]]
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// CHECK: switch i32 [[IV]], label %[[SECTIONS_EXIT:.+]] [
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// CHECK-NEXT: i32 0, label %[[SECTIONS_CASE0:.+]]
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// CHECK-NEXT: i32 1, label %[[SECTIONS_CASE1:.+]]
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#pragma omp section
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// CHECK: [[SECTIONS_CASE0]]
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// CHECK-NEXT: invoke void @{{.*}}foo{{.*}}()
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// CHECK: br label %[[SECTIONS_EXIT]]
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foo();
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#pragma omp section
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// CHECK: [[SECTIONS_CASE1]]
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// CHECK-NEXT: invoke void @{{.*}}bar{{.*}}()
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// CHECK: br label %[[SECTIONS_EXIT]]
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bar();
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// CHECK: [[SECTIONS_EXIT]]
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// <<++IV;>>
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// CHECK: [[IV:%.+]] = load i32, i32* [[IV_PTR]]
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// CHECK-NEXT: [[INC:%.+]] = add nsw i32 [[IV]], 1
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// CHECK-NEXT: store i32 [[INC]], i32* [[IV_PTR]]
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// CHECK-NEXT: br label %[[INNER_FOR_COND]]
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// CHECK: [[INNER_LOOP_END]]
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}
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// CHECK: call void @__kmpc_for_static_fini(%{{.+}}* @{{.+}}, i32 [[GTID]])
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// CHECK: call void @__kmpc_barrier(%{{.+}}* [[IMPLICIT_BARRIER_LOC]],
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return tmain<int>();
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}
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// CHECK-LABEL: tmain
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// CHECK: call void {{.*}} @__kmpc_fork_call(
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// CHECK-NOT: __kmpc_global_thread_num
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// CHECK: [[RES:%.+]] = call i32 @__kmpc_single(
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// CHECK-NEXT: [[BOOLRES:%.+]] = icmp ne i32 [[RES]], 0
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// CHECK-NEXT: br i1 [[BOOLRES]], label %[[THEN:.+]], label %[[END:.+]]
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// CHECK: [[THEN]]
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// CHECK-NEXT: invoke void @{{.*}}foo{{.*}}()
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// CHECK-NEXT: unwind label %[[TERM_LPAD:.+]]
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// CHECK: call void @__kmpc_end_single(
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// CHECK-NEXT: br label %[[END]]
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// CHECK: [[END]]
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// CHECK-NEXT: call void @__kmpc_barrier(%{{.+}}* [[IMPLICIT_BARRIER_LOC]],
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// CHECK-NEXT: ret
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// CHECK: [[TERM_LPAD]]
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// CHECK: call void @__clang_call_terminate(i8*
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// CHECK-NEXT: unreachable
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#endif
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