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e7a5517a58
teak-llvm/clang/test/OpenMP/parallel_codegen.cpp
Alexey Bataev e7a5517a58 [OPENMP] Codegen for 'firstprivate' clause. 
This patch generates some helper variables that used as private copies of the corresponding original variables inside an OpenMP 'parallel' directive. These generated variables are initialized by copy using values of the original variables (with the copy constructor, if any). For arrays, initializator is generated for single element and in the codegen procedure this initial value is automatically propagated between all elements of the private copy.
In outlined function, references to original variables are replaced by the references to these private helper variables. At the end of the initialization of the private variables an implicit barier is generated by calling __kmpc_barrier(...) runtime function to be sure that all threads were initialized using original values of the variables.
Differential Revision: http://reviews.llvm.org/D5140

llvm-svn: 219295
2014-10-08 10:42:55 +00:00

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// RUN: %clang_cc1 -verify -fopenmp=libiomp5 -x c++ -emit-llvm %s -fexceptions -fcxx-exceptions -o - | FileCheck %s
// RUN: %clang_cc1 -fopenmp=libiomp5 -x c++ -std=c++11 -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -emit-pch -o %t %s
// RUN: %clang_cc1 -fopenmp=libiomp5 -x c++ -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -g -std=c++11 -include-pch %t -verify %s -emit-llvm -o - | FileCheck --check-prefix=CHECK-DEBUG %s
// expected-no-diagnostics
#ifndef HEADER
#define HEADER
// CHECK-DAG: %ident_t = type { i32, i32, i32, i32, i8* }
// CHECK-DAG: %struct.anon = type { i32* }
// CHECK-DAG: %struct.anon.0 = type { i8*** }
// CHECK-DAG: [[STR:@.+]] = private unnamed_addr constant [23 x i8] c";unknown;unknown;0;0;;\00"
// CHECK-DAG: [[DEF_LOC_2:@.+]] = private unnamed_addr constant %ident_t { i32 0, i32 2, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8]* [[STR]], i32 0, i32 0) }
// CHECK-DEBUG-DAG: %ident_t = type { i32, i32, i32, i32, i8* }
// CHECK-DEBUG-DAG: %struct.anon = type { i32* }
// CHECK-DEBUG-DAG: %struct.anon.0 = type { i8*** }
// CHECK-DEBUG-DAG: [[STR:@.+]] = private unnamed_addr constant [23 x i8] c";unknown;unknown;0;0;;\00"
// CHECK-DEBUG-DAG: [[DEF_LOC_2:@.+]] = private unnamed_addr constant %ident_t { i32 0, i32 2, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8]* [[STR]], i32 0, i32 0) }
// CHECK-DEBUG-DAG: [[LOC1:@.+]] = private unnamed_addr constant [{{.+}} x i8] c";{{.*}}parallel_codegen.cpp;main;[[@LINE+14]];9;;\00"
// CHECK-DEBUG-DAG: [[LOC2:@.+]] = private unnamed_addr constant [{{.+}} x i8] c";{{.*}}parallel_codegen.cpp;tmain;[[@LINE+7]];9;;\00"
template <class T>
void foo(T argc) {}
template <typename T>
int tmain(T argc) {
#pragma omp parallel
foo(argc);
return 0;
}
int main (int argc, char **argv) {
#pragma omp parallel
foo(argc);
return tmain(argv);
}
// CHECK-LABEL: define {{[a-z]*[ ]?i32}} @main({{i32[ ]?[a-z]*}} %argc, i8** %argv)
// CHECK: [[AGG_CAPTURED:%.+]] = alloca %struct.anon
// CHECK: [[ARGC_REF:%.+]] = getelementptr inbounds %struct.anon* [[AGG_CAPTURED]], i32 0, i32 0
// CHECK-NEXT: store i32* {{%[a-z0-9.]+}}, i32** [[ARGC_REF]]
// CHECK-NEXT: [[BITCAST:%.+]] = bitcast %struct.anon* [[AGG_CAPTURED]] to i8*
// CHECK-NEXT: call void (%ident_t*, i32, void (i32*, i32*, ...)*, ...)* @__kmpc_fork_call(%ident_t* [[DEF_LOC_2]], i32 1, void (i32*, i32*, ...)* bitcast (void (i32*, i32*, %struct.anon*)* @.omp_outlined. to void (i32*, i32*, ...)*), i8* [[BITCAST]])
// CHECK-NEXT: [[ARGV:%.+]] = load i8*** {{%[a-z0-9.]+}}
// CHECK-NEXT: [[RET:%.+]] = call {{[a-z]*[ ]?i32}} [[TMAIN:@.+tmain.+]](i8** [[ARGV]])
// CHECK-NEXT: ret i32 [[RET]]
// CHECK-NEXT: }
// CHECK-DEBUG-LABEL: define i32 @main(i32 %argc, i8** %argv)
// CHECK-DEBUG-DAG: [[AGG_CAPTURED:%.+]] = alloca %struct.anon
// CHECK-DEBUG-DAG: [[LOC_2_ADDR:%.+]] = alloca %ident_t
// CHECK-DEBUG: [[KMPC_LOC_VOIDPTR:%.+]] = bitcast %ident_t* [[LOC_2_ADDR]] to i8*
// CHECK-DEBUG-NEXT: [[KMPC_DEFAULT_LOC_VOIDPTR:%.+]] = bitcast %ident_t* [[DEF_LOC_2]] to i8*
// CHECK-DEBUG-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[KMPC_LOC_VOIDPTR]], i8* [[KMPC_DEFAULT_LOC_VOIDPTR]], i64 ptrtoint (%ident_t* getelementptr (%ident_t* null, i32 1) to i64), i32 8, i1 false)
// CHECK-DEBUG: [[ARGC_REF:%.+]] = getelementptr inbounds %struct.anon* [[AGG_CAPTURED]], i32 0, i32 0
// CHECK-DEBUG-NEXT: store i32* {{%[a-z0-9.]+}}, i32** [[ARGC_REF]]
// CHECK-DEBUG-NEXT: [[KMPC_LOC_PSOURCE_REF:%.+]] = getelementptr inbounds %ident_t* [[LOC_2_ADDR]], i32 0, i32 4
// CHECK-DEBUG-NEXT: store i8* getelementptr inbounds ([{{.+}} x i8]* [[LOC1]], i32 0, i32 0), i8** [[KMPC_LOC_PSOURCE_REF]]
// CHECK-DEBUG-NEXT: [[BITCAST:%.+]] = bitcast %struct.anon* [[AGG_CAPTURED]] to i8*
// CHECK-DEBUG-NEXT: call void (%ident_t*, i32, void (i32*, i32*, ...)*, ...)* @__kmpc_fork_call(%ident_t* [[LOC_2_ADDR]], i32 1, void (i32*, i32*, ...)* bitcast (void (i32*, i32*, %struct.anon*)* @.omp_outlined. to void (i32*, i32*, ...)*), i8* [[BITCAST]])
// CHECK-DEBUG-NEXT: [[ARGV:%.+]] = load i8*** {{%[a-z0-9.]+}}
// CHECK-DEBUG-NEXT: [[RET:%.+]] = call i32 [[TMAIN:@.+tmain.+]](i8** [[ARGV]])
// CHECK-DEBUG-NEXT: ret i32 [[RET]]
// CHECK-DEBUG-NEXT: }
// CHECK-LABEL: define internal void @.omp_outlined.(i32* %.global_tid., i32* %.bound_tid., %struct.anon* %__context)
// CHECK: [[CONTEXT_ADDR:%.+]] = alloca %struct.anon*
// CHECK: store %struct.anon* %__context, %struct.anon** [[CONTEXT_ADDR]]
// CHECK: [[CONTEXT_PTR:%.+]] = load %struct.anon** [[CONTEXT_ADDR]]
// CHECK-NEXT: [[ARGC_PTR_REF:%.+]] = getelementptr inbounds %struct.anon* [[CONTEXT_PTR]], i32 0, i32 0
// CHECK-NEXT: [[ARGC_REF:%.+]] = load i32** [[ARGC_PTR_REF]]
// CHECK-NEXT: [[ARGC:%.+]] = load i32* [[ARGC_REF]]
// CHECK-NEXT: invoke void [[FOO:@.+foo.+]](i32{{[ ]?[a-z]*}} [[ARGC]])
// CHECK: ret void
// CHECK: call void @{{.+terminate.*}}(
// CHECK-NEXT: unreachable
// CHECK-NEXT: }
// CHECK-DEBUG-LABEL: define internal void @.omp_outlined.(i32* %.global_tid., i32* %.bound_tid., %struct.anon* %__context)
// CHECK-DEBUG: [[CONTEXT_ADDR:%.+]] = alloca %struct.anon*
// CHECK-DEBUG: store %struct.anon* %__context, %struct.anon** [[CONTEXT_ADDR]]
// CHECK-DEBUG: [[CONTEXT_PTR:%.+]] = load %struct.anon** [[CONTEXT_ADDR]]
// CHECK-DEBUG-NEXT: [[ARGC_PTR_REF:%.+]] = getelementptr inbounds %struct.anon* [[CONTEXT_PTR]], i32 0, i32 0
// CHECK-DEBUG-NEXT: [[ARGC_REF:%.+]] = load i32** [[ARGC_PTR_REF]]
// CHECK-DEBUG-NEXT: [[ARGC:%.+]] = load i32* [[ARGC_REF]]
// CHECK-DEBUG-NEXT: invoke void [[FOO:@.+foo.+]](i32 [[ARGC]])
// CHECK-DEBUG: ret void
// CHECK-DEBUG: call void @{{.+terminate.*}}(
// CHECK-DEBUG-NEXT: unreachable
// CHECK-DEBUG-NEXT: }
// CHECK-DAG: define linkonce_odr void [[FOO]]({{i32[ ]?[a-z]*}} %argc)
// CHECK-DAG: declare void @__kmpc_fork_call(%ident_t*, i32, void (i32*, i32*, ...)*, ...)
// CHECK-DEBUG-DAG: define linkonce_odr void [[FOO]](i32 %argc)
// CHECK-DEBUG-DAG: declare void @__kmpc_fork_call(%ident_t*, i32, void (i32*, i32*, ...)*, ...)
// CHECK: define linkonce_odr {{[a-z]*[ ]?i32}} [[TMAIN]](i8** %argc)
// CHECK: [[AGG_CAPTURED:%.+]] = alloca %struct.anon.0
// CHECK: [[ARGC_REF:%.+]] = getelementptr inbounds %struct.anon.0* [[AGG_CAPTURED]], i32 0, i32 0
// CHECK-NEXT: store i8*** {{%[a-z0-9.]+}}, i8**** [[ARGC_REF]]
// CHECK-NEXT: [[BITCAST:%.+]] = bitcast %struct.anon.0* [[AGG_CAPTURED]] to i8*
// CHECK-NEXT: call void (%ident_t*, i32, void (i32*, i32*, ...)*, ...)* @__kmpc_fork_call(%ident_t* [[DEF_LOC_2]], i32 1, void (i32*, i32*, ...)* bitcast (void (i32*, i32*, %struct.anon.0*)* @.omp_outlined.1 to void (i32*, i32*, ...)*), i8* [[BITCAST]])
// CHECK-NEXT: ret i32 0
// CHECK-NEXT: }
// CHECK-DEBUG: define linkonce_odr i32 [[TMAIN]](i8** %argc)
// CHECK-DEBUG-DAG: [[AGG_CAPTURED:%.+]] = alloca %struct.anon.0
// CHECK-DEBUG-DAG: [[LOC_2_ADDR:%.+]] = alloca %ident_t
// CHECK-DEBUG: [[KMPC_LOC_VOIDPTR:%.+]] = bitcast %ident_t* [[LOC_2_ADDR]] to i8*
// CHECK-DEBUG-NEXT: [[KMPC_DEFAULT_LOC_VOIDPTR:%.+]] = bitcast %ident_t* [[DEF_LOC_2]] to i8*
// CHECK-DEBUG-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[KMPC_LOC_VOIDPTR]], i8* [[KMPC_DEFAULT_LOC_VOIDPTR]], i64 ptrtoint (%ident_t* getelementptr (%ident_t* null, i32 1) to i64), i32 8, i1 false)
// CHECK-DEBUG: [[ARGC_REF:%.+]] = getelementptr inbounds %struct.anon.0* [[AGG_CAPTURED]], i32 0, i32 0
// CHECK-DEBUG-NEXT: store i8*** {{%[a-z0-9.]+}}, i8**** [[ARGC_REF]]
// CHECK-DEBUG-NEXT: [[KMPC_LOC_PSOURCE_REF:%.+]] = getelementptr inbounds %ident_t* [[LOC_2_ADDR]], i32 0, i32 4
// CHECK-DEBUG-NEXT: store i8* getelementptr inbounds ([{{.+}} x i8]* [[LOC2]], i32 0, i32 0), i8** [[KMPC_LOC_PSOURCE_REF]]
// CHECK-DEBUG-NEXT: [[BITCAST:%.+]] = bitcast %struct.anon.0* [[AGG_CAPTURED]] to i8*
// CHECK-DEBUG-NEXT: call void (%ident_t*, i32, void (i32*, i32*, ...)*, ...)* @__kmpc_fork_call(%ident_t* [[LOC_2_ADDR]], i32 1, void (i32*, i32*, ...)* bitcast (void (i32*, i32*, %struct.anon.0*)* @.omp_outlined.1 to void (i32*, i32*, ...)*), i8* [[BITCAST]])
// CHECK-DEBUG-NEXT: ret i32 0
// CHECK-DEBUG-NEXT: }
// CHECK-LABEL: define internal void @.omp_outlined.1(i32* %.global_tid., i32* %.bound_tid., %struct.anon.0* %__context)
// CHECK: [[CONTEXT_ADDR:%.+]] = alloca %struct.anon.0*
// CHECK: store %struct.anon.0* %__context, %struct.anon.0** [[CONTEXT_ADDR]]
// CHECK: [[CONTEXT_PTR:%.+]] = load %struct.anon.0** [[CONTEXT_ADDR]]
// CHECK-NEXT: [[ARGC_PTR_REF:%.+]] = getelementptr inbounds %struct.anon.0* [[CONTEXT_PTR]], i32 0, i32 0
// CHECK-NEXT: [[ARGC_REF:%.+]] = load i8**** [[ARGC_PTR_REF]]
// CHECK-NEXT: [[ARGC:%.+]] = load i8*** [[ARGC_REF]]
// CHECK-NEXT: invoke void [[FOO1:@.+foo.+]](i8** [[ARGC]])
// CHECK: ret void
// CHECK: call void @{{.+terminate.*}}(
// CHECK-NEXT: unreachable
// CHECK-NEXT: }
// CHECK-DEBUG-LABEL: define internal void @.omp_outlined.1(i32* %.global_tid., i32* %.bound_tid., %struct.anon.0* %__context)
// CHECK-DEBUG: [[CONTEXT_ADDR:%.+]] = alloca %struct.anon.0*
// CHECK-DEBUG: store %struct.anon.0* %__context, %struct.anon.0** [[CONTEXT_ADDR]]
// CHECK-DEBUG: [[CONTEXT_PTR:%.+]] = load %struct.anon.0** [[CONTEXT_ADDR]]
// CHECK-DEBUG-NEXT: [[ARGC_PTR_REF:%.+]] = getelementptr inbounds %struct.anon.0* [[CONTEXT_PTR]], i32 0, i32 0
// CHECK-DEBUG-NEXT: [[ARGC_REF:%.+]] = load i8**** [[ARGC_PTR_REF]]
// CHECK-DEBUG-NEXT: [[ARGC:%.+]] = load i8*** [[ARGC_REF]]
// CHECK-DEBUG-NEXT: invoke void [[FOO1:@.+foo.+]](i8** [[ARGC]])
// CHECK-DEBUG: ret void
// CHECK-DEBUG: call void @{{.+terminate.*}}(
// CHECK-DEBUG-NEXT: unreachable
// CHECK-DEBUG-NEXT: }
// CHECK: define linkonce_odr void [[FOO1]](i8** %argc)
// CHECK-DEBUG: define linkonce_odr void [[FOO1]](i8** %argc)
#endif
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