[flang-commits] [flang] [flang] GETPID runtime and lower intrinsic implementation (PR #70442)
Yi Wu via flang-commits
flang-commits at lists.llvm.org
Thu Nov 2 08:21:14 PDT 2023
https://github.com/PAX-12-WU updated https://github.com/llvm/llvm-project/pull/70442
>From 174d304544e576f251ecb634c7124a53d2c4f367 Mon Sep 17 00:00:00 2001
From: Yi Wu <yi.wu2 at arm.com>
Date: Fri, 27 Oct 2023 09:16:11 +0000
Subject: [PATCH] [flang] GETPID runtime and lower intrinsic implementation
Runtime function GetPID calls the function getpid
from unistd.h or processthreadsapi.h base on the OS.
Processthreadsapi.g is supported since Windows XP:
https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-getcurrentprocessid
and GetCurrentProcessId returns a DWORD, an unsigned 32-bit int:
https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-dtyp/262627d8-3418-4627-9218-4ffe110850b2
---
flang/docs/Intrinsics.md | 2 +-
.../flang/Optimizer/Builder/IntrinsicCall.h | 2 ++
.../flang/Optimizer/Builder/Runtime/Command.h | 4 ++++
.../flang/Optimizer/Builder/Runtime/RTBuilder.h | 14 ++++++++++++++
flang/include/flang/Runtime/command.h | 10 ++++++++++
flang/lib/Evaluate/intrinsics.cpp | 1 +
flang/lib/Optimizer/Builder/IntrinsicCall.cpp | 9 +++++++++
flang/lib/Optimizer/Builder/Runtime/Command.cpp | 8 ++++++++
flang/runtime/command.cpp | 13 +++++++++++++
flang/test/Lower/Intrinsics/getpid.f90 | 16 ++++++++++++++++
.../Optimizer/Builder/Runtime/CommandTest.cpp | 7 +++++++
flang/unittests/Runtime/CommandTest.cpp | 5 +++++
12 files changed, 90 insertions(+), 1 deletion(-)
create mode 100644 flang/test/Lower/Intrinsics/getpid.f90
diff --git a/flang/docs/Intrinsics.md b/flang/docs/Intrinsics.md
index ab0a940e53e5538..fef2b4ea4dd8c85 100644
--- a/flang/docs/Intrinsics.md
+++ b/flang/docs/Intrinsics.md
@@ -750,7 +750,7 @@ This phase currently supports all the intrinsic procedures listed above but the
| Coarray intrinsic functions | IMAGE_INDEX, COSHAPE |
| Object characteristic inquiry functions | ALLOCATED, ASSOCIATED, EXTENDS_TYPE_OF, IS_CONTIGUOUS, PRESENT, RANK, SAME_TYPE, STORAGE_SIZE |
| Type inquiry intrinsic functions | BIT_SIZE, DIGITS, EPSILON, HUGE, KIND, MAXEXPONENT, MINEXPONENT, NEW_LINE, PRECISION, RADIX, RANGE, TINY|
-| Non-standard intrinsic functions | AND, OR, XOR, SHIFT, ZEXT, IZEXT, COSD, SIND, TAND, ACOSD, ASIND, ATAND, ATAN2D, COMPL, EQV, NEQV, INT8, JINT, JNINT, KNINT, QCMPLX, DREAL, DFLOAT, QEXT, QFLOAT, QREAL, DNUM, NUM, JNUM, KNUM, QNUM, RNUM, RAN, RANF, ILEN, SIZEOF, MCLOCK, SECNDS, COTAN, IBCHNG, ISHA, ISHC, ISHL, IXOR, IARG, IARGC, NARGS, NUMARG, BADDRESS, IADDR, CACHESIZE, EOF, FP_CLASS, INT_PTR_KIND, ISNAN, MALLOC |
+| Non-standard intrinsic functions | AND, OR, XOR, SHIFT, ZEXT, IZEXT, COSD, SIND, TAND, ACOSD, ASIND, ATAND, ATAN2D, COMPL, EQV, NEQV, INT8, JINT, JNINT, KNINT, QCMPLX, DREAL, DFLOAT, QEXT, QFLOAT, QREAL, DNUM, NUM, JNUM, KNUM, QNUM, RNUM, RAN, RANF, ILEN, SIZEOF, MCLOCK, SECNDS, COTAN, IBCHNG, ISHA, ISHC, ISHL, IXOR, IARG, IARGC, NARGS, GETPID, NUMARG, BADDRESS, IADDR, CACHESIZE, EOF, FP_CLASS, INT_PTR_KIND, ISNAN, MALLOC |
| Intrinsic subroutines |MVBITS (elemental), CPU_TIME, DATE_AND_TIME, EVENT_QUERY, EXECUTE_COMMAND_LINE, GET_COMMAND, GET_COMMAND_ARGUMENT, GET_ENVIRONMENT_VARIABLE, MOVE_ALLOC, RANDOM_INIT, RANDOM_NUMBER, RANDOM_SEED, SYSTEM_CLOCK |
| Atomic intrinsic subroutines | ATOMIC_ADD |
| Collective intrinsic subroutines | CO_REDUCE |
diff --git a/flang/include/flang/Optimizer/Builder/IntrinsicCall.h b/flang/include/flang/Optimizer/Builder/IntrinsicCall.h
index 06db8cf9e9dc923..5065f11ae9e7264 100644
--- a/flang/include/flang/Optimizer/Builder/IntrinsicCall.h
+++ b/flang/include/flang/Optimizer/Builder/IntrinsicCall.h
@@ -223,6 +223,8 @@ struct IntrinsicLibrary {
mlir::Value genFraction(mlir::Type resultType,
mlir::ArrayRef<mlir::Value> args);
void genGetCommand(mlir::ArrayRef<fir::ExtendedValue> args);
+ mlir::Value genGetPID(mlir::Type resultType,
+ llvm::ArrayRef<mlir::Value> args);
void genGetCommandArgument(mlir::ArrayRef<fir::ExtendedValue> args);
void genGetEnvironmentVariable(llvm::ArrayRef<fir::ExtendedValue>);
fir::ExtendedValue genIall(mlir::Type, llvm::ArrayRef<fir::ExtendedValue>);
diff --git a/flang/include/flang/Optimizer/Builder/Runtime/Command.h b/flang/include/flang/Optimizer/Builder/Runtime/Command.h
index 9ecdba2c995b713..976fb3aa0b6fbb7 100644
--- a/flang/include/flang/Optimizer/Builder/Runtime/Command.h
+++ b/flang/include/flang/Optimizer/Builder/Runtime/Command.h
@@ -31,6 +31,10 @@ mlir::Value genGetCommand(fir::FirOpBuilder &, mlir::Location,
mlir::Value command, mlir::Value length,
mlir::Value errmsg);
+/// Generate a call to the GetPID runtime function which implements the
+/// GETPID intrinsic.
+mlir::Value genGetPID(fir::FirOpBuilder &, mlir::Location);
+
/// Generate a call to the GetCommandArgument runtime function which implements
/// the GET_COMMAND_ARGUMENT intrinsic.
/// \p value, \p length and \p errmsg must be fir.box that can be absent (but
diff --git a/flang/include/flang/Optimizer/Builder/Runtime/RTBuilder.h b/flang/include/flang/Optimizer/Builder/Runtime/RTBuilder.h
index b2774263e7a31a4..99558cf03d4ffe7 100644
--- a/flang/include/flang/Optimizer/Builder/Runtime/RTBuilder.h
+++ b/flang/include/flang/Optimizer/Builder/Runtime/RTBuilder.h
@@ -25,8 +25,14 @@
#include "mlir/IR/BuiltinTypes.h"
#include "mlir/IR/MLIRContext.h"
#include "llvm/ADT/SmallVector.h"
+#include <cstdint>
#include <functional>
+#ifdef _WIN32
+// On Windows* OS GetCurrentProcessId returns DWORD aka uint32_t
+typedef std::uint32_t pid_t;
+#endif
+
// Incomplete type indicating C99 complex ABI in interfaces. Beware, _Complex
// and std::complex are layout compatible, but not compatible in all ABI call
// interfaces (e.g. X86 32 bits). _Complex is not standard C++, so do not use
@@ -62,6 +68,14 @@ using FuncTypeBuilderFunc = mlir::FunctionType (*)(mlir::MLIRContext *);
/// standard type `i32` when `sizeof(int)` is 4.
template <typename T>
static constexpr TypeBuilderFunc getModel();
+
+template <>
+constexpr TypeBuilderFunc getModel<unsigned int>() {
+ return [](mlir::MLIRContext *context) -> mlir::Type {
+ return mlir::IntegerType::get(context, 8 * sizeof(unsigned int));
+ };
+}
+
template <>
constexpr TypeBuilderFunc getModel<short int>() {
return [](mlir::MLIRContext *context) -> mlir::Type {
diff --git a/flang/include/flang/Runtime/command.h b/flang/include/flang/Runtime/command.h
index ec6289390545479..d0c1ce5d90e951f 100644
--- a/flang/include/flang/Runtime/command.h
+++ b/flang/include/flang/Runtime/command.h
@@ -11,6 +11,13 @@
#include "flang/Runtime/entry-names.h"
+#ifdef _WIN32
+// On Windows* OS GetCurrentProcessId returns DWORD aka uint32_t
+typedef std::uint32_t pid_t;
+#else
+#include "sys/types.h" //pid_t
+#endif
+
#include <cstdint>
namespace Fortran::runtime {
@@ -23,6 +30,9 @@ extern "C" {
// integer kind.
std::int32_t RTNAME(ArgumentCount)();
+// Calls getpid()
+pid_t RTNAME(GetPID)();
+
// 16.9.82 GET_COMMAND
// Try to get the value of the whole command. All of the parameters are
// optional.
diff --git a/flang/lib/Evaluate/intrinsics.cpp b/flang/lib/Evaluate/intrinsics.cpp
index e4125f6572aa983..e2599c75fe6b72d 100644
--- a/flang/lib/Evaluate/intrinsics.cpp
+++ b/flang/lib/Evaluate/intrinsics.cpp
@@ -499,6 +499,7 @@ static const IntrinsicInterface genericIntrinsicFunction[]{
{"gamma", {{"x", SameReal}}, SameReal},
{"get_team", {{"level", DefaultInt, Rank::scalar, Optionality::optional}},
TeamType, Rank::scalar, IntrinsicClass::transformationalFunction},
+ {"getpid", {}, DefaultInt},
{"huge",
{{"x", SameIntOrReal, Rank::anyOrAssumedRank, Optionality::required,
common::Intent::In, {ArgFlag::canBeNull}}},
diff --git a/flang/lib/Optimizer/Builder/IntrinsicCall.cpp b/flang/lib/Optimizer/Builder/IntrinsicCall.cpp
index 0a023bc6b21ea03..454d38592a8bc4f 100644
--- a/flang/lib/Optimizer/Builder/IntrinsicCall.cpp
+++ b/flang/lib/Optimizer/Builder/IntrinsicCall.cpp
@@ -253,6 +253,7 @@ static constexpr IntrinsicHandler handlers[]{
{"trim_name", asAddr, handleDynamicOptional},
{"errmsg", asBox, handleDynamicOptional}}},
/*isElemental=*/false},
+ {"getpid", &I::genGetPID},
{"iachar", &I::genIchar},
{"iall",
&I::genIall,
@@ -2936,6 +2937,14 @@ void IntrinsicLibrary::genGetCommand(llvm::ArrayRef<fir::ExtendedValue> args) {
}
}
+// GETPID
+mlir::Value IntrinsicLibrary::genGetPID(mlir::Type resultType,
+ llvm::ArrayRef<mlir::Value> args) {
+ assert(args.size() == 0 && "getpid takes no input");
+ return builder.createConvert(loc, resultType,
+ fir::runtime::genGetPID(builder, loc));
+}
+
// GET_COMMAND_ARGUMENT
void IntrinsicLibrary::genGetCommandArgument(
llvm::ArrayRef<fir::ExtendedValue> args) {
diff --git a/flang/lib/Optimizer/Builder/Runtime/Command.cpp b/flang/lib/Optimizer/Builder/Runtime/Command.cpp
index f56475a97487835..1d719e7bbd9a2d1 100644
--- a/flang/lib/Optimizer/Builder/Runtime/Command.cpp
+++ b/flang/lib/Optimizer/Builder/Runtime/Command.cpp
@@ -48,6 +48,14 @@ mlir::Value fir::runtime::genGetCommand(fir::FirOpBuilder &builder,
return builder.create<fir::CallOp>(loc, runtimeFunc, args).getResult(0);
}
+mlir::Value fir::runtime::genGetPID(fir::FirOpBuilder &builder,
+ mlir::Location loc) {
+ auto runtimeFunc =
+ fir::runtime::getRuntimeFunc<mkRTKey(GetPID)>(loc, builder);
+
+ return builder.create<fir::CallOp>(loc, runtimeFunc).getResult(0);
+}
+
mlir::Value fir::runtime::genGetCommandArgument(
fir::FirOpBuilder &builder, mlir::Location loc, mlir::Value number,
mlir::Value value, mlir::Value length, mlir::Value errmsg) {
diff --git a/flang/runtime/command.cpp b/flang/runtime/command.cpp
index b81a0791c5e571b..efc80e9559924f6 100644
--- a/flang/runtime/command.cpp
+++ b/flang/runtime/command.cpp
@@ -15,6 +15,17 @@
#include <cstdlib>
#include <limits>
+#ifdef _WIN32
+// On Windows GetCurrentProcessId returns a DWORD aka uint32_t
+#define WIN32_LEAN_AND_MEAN
+#define NOMINMAX
+#include <processthreadsapi.h>
+#include <windows.h>
+inline pid_t getpid() { return GetCurrentProcessId(); }
+#else
+#include <unistd.h> //getpid()
+#endif
+
namespace Fortran::runtime {
std::int32_t RTNAME(ArgumentCount)() {
int argc{executionEnvironment.argc};
@@ -25,6 +36,8 @@ std::int32_t RTNAME(ArgumentCount)() {
return 0;
}
+pid_t RTNAME(GetPID)() { return getpid(); }
+
// Returns the length of the \p string. Assumes \p string is valid.
static std::int64_t StringLength(const char *string) {
std::size_t length{std::strlen(string)};
diff --git a/flang/test/Lower/Intrinsics/getpid.f90 b/flang/test/Lower/Intrinsics/getpid.f90
new file mode 100644
index 000000000000000..be459ad9e44874e
--- /dev/null
+++ b/flang/test/Lower/Intrinsics/getpid.f90
@@ -0,0 +1,16 @@
+! RUN: bbc -emit-hlfir %s -o - | FileCheck %s
+
+! CHECK-LABEL: func.func @_QPall_args() {
+! CHECK: %[[VAL_0:.*]] = fir.alloca i32 {bindc_name = "pid", uniq_name = "_QFall_argsEpid"}
+! CHECK: %[[VAL_1:.*]]:2 = hlfir.declare %0 {uniq_name = "_QFall_argsEpid"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
+! CHECK: %[[VAL_2:.*]] = fir.call @_FortranAGetPID() fastmath<contract> : () -> i32
+! CHECK: hlfir.assign %[[VAL_2:.*]] to %[[VAL_1:.*]]#0 : i32, !fir.ref<i32>
+! CHECK: return
+! CHECK: }
+
+subroutine all_args()
+ integer :: pid
+ pid = getpid()
+end
+
+
diff --git a/flang/unittests/Optimizer/Builder/Runtime/CommandTest.cpp b/flang/unittests/Optimizer/Builder/Runtime/CommandTest.cpp
index acc79ae63e9f698..58a151447d5b4f7 100644
--- a/flang/unittests/Optimizer/Builder/Runtime/CommandTest.cpp
+++ b/flang/unittests/Optimizer/Builder/Runtime/CommandTest.cpp
@@ -44,3 +44,10 @@ TEST_F(RuntimeCallTest, genGetEnvVariable) {
checkCallOp(result.getDefiningOp(), "_FortranAGetEnvVariable", /*nbArgs=*/5,
/*addLocArgs=*/true);
}
+
+TEST_F(RuntimeCallTest, genGetPID) {
+ mlir::Location loc = firBuilder->getUnknownLoc();
+ mlir::Value result = fir::runtime::genGetPID(*firBuilder, loc);
+ checkCallOp(result.getDefiningOp(), "_FortranAGetPID", /*nbArgs=*/0,
+ /*addLocArgs=*/false);
+}
\ No newline at end of file
diff --git a/flang/unittests/Runtime/CommandTest.cpp b/flang/unittests/Runtime/CommandTest.cpp
index c3571c9684e4b07..9f66c7924c86e3c 100644
--- a/flang/unittests/Runtime/CommandTest.cpp
+++ b/flang/unittests/Runtime/CommandTest.cpp
@@ -388,6 +388,11 @@ TEST_F(OnlyValidArguments, GetCommandShortLength) {
CheckDescriptorEqInt<short>(length.get(), 51);
}
+TEST_F(ZeroArguments, GetPID) {
+ // pid should always greater than 0, in both linux and windows
+ EXPECT_GT(RTNAME(GetPID)(), 0);
+}
+
class EnvironmentVariables : public CommandFixture {
protected:
EnvironmentVariables() : CommandFixture(0, nullptr) {
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