[OpenMP] Add support for Solaris/x86_64 (#70593)

Tested on `amd64-pc-solaris2.11`.

8 files changed, 62 insertions, 16 deletions

diff --git a/clang/lib/Driver/ToolChains/Solaris.cpp b/clang/lib/Driver/ToolChains/Solaris.cpp
index ee2504e..5421c02 100644
--- a/clang/lib/Driver/ToolChains/Solaris.cpp
+++ b/clang/lib/Driver/ToolChains/Solaris.cpp
@@ -215,6 +215,11 @@ void solaris::Linker::ConstructJob(Compilation &C, const JobAction &JA,
 
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
                    options::OPT_r)) {
+    // Use the static OpenMP runtime with -static-openmp
+    bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) &&
+                        !Args.hasArg(options::OPT_static);
+    addOpenMPRuntime(CmdArgs, getToolChain(), Args, StaticOpenMP);
+
     if (D.CCCIsCXX()) {
       if (getToolChain().ShouldLinkCXXStdlib(Args))
         getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
diff --git a/clang/test/Driver/fopenmp.c b/clang/test/Driver/fopenmp.c
index cf04340..2919469 100644
--- a/clang/test/Driver/fopenmp.c
+++ b/clang/test/Driver/fopenmp.c
@@ -16,6 +16,9 @@
 // RUN: %clang -target x86_64-dragonfly -fopenmp=libomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CC1-OPENMP
 // RUN: %clang -target x86_64-dragonfly -fopenmp=libgomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CC1-NO-OPENMP
 // RUN: %clang -target x86_64-dragonfly -fopenmp=libiomp5 -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CC1-OPENMP
+// RUN: %clang -target i386-pc-solaris2.11 -fopenmp=libomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CC1-OPENMP
+// RUN: %clang -target i386-pc-solaris2.11 -fopenmp=libgomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CC1-NO-OPENMP
+// RUN: %clang -target i386-pc-solaris2.11 -fopenmp=libiomp5 -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CC1-OPENMP
 // RUN: %clang -target x86_64-windows-gnu -fopenmp=libomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CC1-OPENMP
 // RUN: %clang -target x86_64-windows-gnu -fopenmp=libgomp -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CC1-NO-OPENMP
 // RUN: %clang -target x86_64-windows-gnu -fopenmp=libiomp5 -c %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-CC1-OPENMP
@@ -106,6 +109,19 @@
 // RUN: %clang -nostdlib -target x86_64-dragonfly -fopenmp=libgomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-NO-GOMP
 // RUN: %clang -nostdlib -target x86_64-dragonfly -fopenmp=libiomp5 %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-NO-IOMP5
 //
+// RUN: %clang -target i386-pc-solaris2.11 -fopenmp=libomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-OMP
+// RUN: %clang -target i386-pc-solaris2.11 -fopenmp=libgomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-GOMP --check-prefix=CHECK-LD-GOMP-NO-RT
+// RUN: %clang -target i386-pc-solaris2.11 -fopenmp=libiomp5 %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-IOMP5
+//
+// RUN: %clang -target i386-pc-solaris2.11 -fopenmp=libomp -static-openmp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-STATIC-OMP
+// RUN: %clang -target i386-pc-solaris2.11 -fopenmp=libgomp -static-openmp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-STATIC-GOMP --check-prefix=CHECK-LD-STATIC-GOMP-NO-RT
+// RUN: %clang -target i386-pc-solaris2.11 -fopenmp=libiomp5 -static-openmp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-STATIC-IOMP5
+// RUN: %clang -target i386-pc-solaris2.11 -fopenmp=libiomp5 -static -static-openmp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-STATIC-IOMP5-NO-BDYNAMIC
+//
+// RUN: %clang -nostdlib -target i386-pc-solaris2.11 -fopenmp=libomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-NO-OMP
+// RUN: %clang -nostdlib -target i386-pc-solaris2.11 -fopenmp=libgomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-NO-GOMP
+// RUN: %clang -nostdlib -target i386-pc-solaris2.11 -fopenmp=libiomp5 %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-NO-IOMP5
+//
 // RUN: %clang -target x86_64-windows-gnu -fopenmp=libomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-OMP
 // RUN: %clang -target x86_64-windows-gnu -fopenmp=libgomp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-GOMP --check-prefix=CHECK-LD-GOMP-NO-RT
 // RUN: %clang -target x86_64-windows-gnu -fopenmp=libiomp5 %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-IOMP5MD
@@ -152,7 +168,7 @@
 // CHECK-LD-STATIC-IOMP5: "-Bstatic" "-liomp5" "-Bdynamic"
 //
 // CHECK-LD-STATIC-IOMP5-NO-BDYNAMIC: "{{.*}}ld{{(.exe)?}}"
-// For x86 Gnu, the driver passes -static, while FreeBSD, NetBSD, OpenBSD and DragonFly pass -Bstatic
+// For x86 Gnu, the driver passes -static, while FreeBSD, NetBSD, OpenBSD, DragonFly and Solaris pass -Bstatic
 // CHECK-LD-STATIC-IOMP5-NO-BDYNAMIC: "-{{B?}}static" {{.*}} "-liomp5"
 // CHECK-LD-STATIC-IOMP5-NO-BDYNAMIC-NOT: "-Bdynamic"
 //
@@ -174,6 +190,7 @@
 // RUN: %clang -target x86_64-netbsd -fopenmp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-ANY
 // RUN: %clang -target x86_64-openbsd -fopenmp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-ANY
 // RUN: %clang -target x86_64-dragonfly -fopenmp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-ANY
+// RUN: %clang -target i386-pc-solaris2.11 -fopenmp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-ANY
 // RUN: %clang -target x86_64-windows-gnu -fopenmp %s -o %t -### 2>&1 | FileCheck %s --check-prefix=CHECK-LD-ANYMD
 //
 // CHECK-LD-ANY: "{{.*}}ld{{(.exe)?}}"
diff --git a/openmp/runtime/cmake/LibompHandleFlags.cmake b/openmp/runtime/cmake/LibompHandleFlags.cmake
index bb53445..ece3db1 100644
--- a/openmp/runtime/cmake/LibompHandleFlags.cmake
+++ b/openmp/runtime/cmake/LibompHandleFlags.cmake
@@ -144,7 +144,7 @@ function(libomp_get_libflags libflags)
     libomp_append(libflags_local "-Wl,--no-as-needed" LIBOMP_HAVE_AS_NEEDED_FLAG)
     libomp_append(libflags_local "-lm")
     libomp_append(libflags_local "-Wl,--as-needed" LIBOMP_HAVE_AS_NEEDED_FLAG)
-  elseif(${CMAKE_SYSTEM_NAME} MATCHES "Linux|NetBSD")
+  elseif(${CMAKE_SYSTEM_NAME} MATCHES "Linux|NetBSD|Solaris")
     libomp_append(libflags_local -lm)
   endif()
   set(libflags_local ${libflags_local} ${LIBOMP_LIBFLAGS})
diff --git a/openmp/runtime/src/kmp.h b/openmp/runtime/src/kmp.h
index 197f85f..dc759ab 100644
--- a/openmp/runtime/src/kmp.h
+++ b/openmp/runtime/src/kmp.h
@@ -1327,12 +1327,16 @@ extern kmp_uint64 __kmp_now_nsec();
 /* TODO: tune for KMP_OS_NETBSD */
 #define KMP_INIT_WAIT 1024U /* initial number of spin-tests   */
 #define KMP_NEXT_WAIT 512U /* susequent number of spin-tests */
+#elif KMP_OS_OPENBSD
+/* TODO: tune for KMP_OS_OPENBSD */
+#define KMP_INIT_WAIT 1024U /* initial number of spin-tests   */
+#define KMP_NEXT_WAIT 512U /* susequent number of spin-tests */
 #elif KMP_OS_HURD
 /* TODO: tune for KMP_OS_HURD */
 #define KMP_INIT_WAIT 1024U /* initial number of spin-tests   */
 #define KMP_NEXT_WAIT 512U /* susequent number of spin-tests */
-#elif KMP_OS_OPENBSD
-/* TODO: tune for KMP_OS_OPENBSD */
+#elif KMP_OS_SOLARIS
+/* TODO: tune for KMP_OS_SOLARIS */
 #define KMP_INIT_WAIT 1024U /* initial number of spin-tests   */
 #define KMP_NEXT_WAIT 512U /* susequent number of spin-tests */
 #endif
diff --git a/openmp/runtime/src/kmp_ftn_entry.h b/openmp/runtime/src/kmp_ftn_entry.h
index ffb01a3..ad19079 100644
--- a/openmp/runtime/src/kmp_ftn_entry.h
+++ b/openmp/runtime/src/kmp_ftn_entry.h
@@ -582,7 +582,7 @@ int FTN_STDCALL KMP_EXPAND_NAME(FTN_GET_THREAD_NUM)(void) {
   int gtid;
 
 #if KMP_OS_DARWIN || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD ||    \
-    KMP_OS_HURD || KMP_OS_OPENBSD
+    KMP_OS_OPENBSD || KMP_OS_HURD || KMP_OS_SOLARIS
   gtid = __kmp_entry_gtid();
 #elif KMP_OS_WINDOWS
   if (!__kmp_init_parallel ||
diff --git a/openmp/runtime/src/kmp_platform.h b/openmp/runtime/src/kmp_platform.h
index 1a2197d..9640d34 100644
--- a/openmp/runtime/src/kmp_platform.h
+++ b/openmp/runtime/src/kmp_platform.h
@@ -23,6 +23,7 @@
 #define KMP_OS_DARWIN 0
 #define KMP_OS_WINDOWS 0
 #define KMP_OS_HURD 0
+#define KMP_OS_SOLARIS 0
 #define KMP_OS_UNIX 0 /* disjunction of KMP_OS_LINUX, KMP_OS_DARWIN etc. */
 
 #ifdef _WIN32
@@ -70,13 +71,19 @@
 #define KMP_OS_HURD 1
 #endif
 
+#if (defined __sun__ && defined __svr4__)
+#undef KMP_OS_SOLARIS
+#define KMP_OS_SOLARIS 1
+#endif
+
 #if (1 != KMP_OS_LINUX + KMP_OS_DRAGONFLY + KMP_OS_FREEBSD + KMP_OS_NETBSD +   \
-              KMP_OS_OPENBSD + KMP_OS_DARWIN + KMP_OS_WINDOWS + KMP_OS_HURD)
+              KMP_OS_OPENBSD + KMP_OS_DARWIN + KMP_OS_WINDOWS + KMP_OS_HURD +  \
+              KMP_OS_SOLARIS)
 #error Unknown OS
 #endif
 
 #if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD ||     \
-    KMP_OS_OPENBSD || KMP_OS_DARWIN || KMP_OS_HURD
+    KMP_OS_OPENBSD || KMP_OS_DARWIN || KMP_OS_HURD || KMP_OS_SOLARIS
 #undef KMP_OS_UNIX
 #define KMP_OS_UNIX 1
 #endif
diff --git a/openmp/runtime/src/kmp_runtime.cpp b/openmp/runtime/src/kmp_runtime.cpp
index e83c0938..bd5b41e 100644
--- a/openmp/runtime/src/kmp_runtime.cpp
+++ b/openmp/runtime/src/kmp_runtime.cpp
@@ -8897,7 +8897,8 @@ __kmp_determine_reduction_method(
     KMP_ARCH_MIPS64 || KMP_ARCH_RISCV64 || KMP_ARCH_LOONGARCH64 || KMP_ARCH_VE
 
 #if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD ||     \
-    KMP_OS_OPENBSD || KMP_OS_WINDOWS || KMP_OS_DARWIN || KMP_OS_HURD
+    KMP_OS_OPENBSD || KMP_OS_WINDOWS || KMP_OS_DARWIN || KMP_OS_HURD ||        \
+    KMP_OS_SOLARIS
 
     int teamsize_cutoff = 4;
 
@@ -8921,12 +8922,13 @@ __kmp_determine_reduction_method(
 #else
 #error "Unknown or unsupported OS"
 #endif // KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD ||
-       // KMP_OS_OPENBSD || KMP_OS_WINDOWS || KMP_OS_DARWIN || KMP_OS_HURD
+       // KMP_OS_OPENBSD || KMP_OS_WINDOWS || KMP_OS_DARWIN || KMP_OS_HURD ||
+       // KMP_OS_SOLARIS
 
 #elif KMP_ARCH_X86 || KMP_ARCH_ARM || KMP_ARCH_AARCH || KMP_ARCH_MIPS
 
 #if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD ||     \
-    KMP_OS_OPENBSD || KMP_OS_WINDOWS || KMP_OS_HURD
+    KMP_OS_OPENBSD || KMP_OS_WINDOWS || KMP_OS_HURD || KMP_OS_SOLARIS
 
     // basic tuning
 
diff --git a/openmp/runtime/src/z_Linux_util.cpp b/openmp/runtime/src/z_Linux_util.cpp
index 5495f60..843d238 100644
--- a/openmp/runtime/src/z_Linux_util.cpp
+++ b/openmp/runtime/src/z_Linux_util.cpp
@@ -60,6 +60,8 @@
 #elif KMP_OS_NETBSD || KMP_OS_OPENBSD
 #include <sys/types.h>
 #include <sys/sysctl.h>
+#elif KMP_OS_SOLARIS
+#include <sys/loadavg.h>
 #endif
 
 #include <ctype.h>
@@ -70,6 +72,15 @@ struct kmp_sys_timer {
   struct timespec start;
 };
 
+#ifdef KMP_OS_SOLARIS
+// Convert timeval to timespec.
+#define TIMEVAL_TO_TIMESPEC(tv, ts)                                            \
+  do {                                                                         \
+    (ts)->tv_sec = (tv)->tv_sec;                                               \
+    (ts)->tv_nsec = (tv)->tv_usec * 1000;                                      \
+  } while (0)
+#endif
+
 // Convert timespec to nanoseconds.
 #define TS2NS(timespec)                                                        \
   (((timespec).tv_sec * (long int)1e9) + (timespec).tv_nsec)
@@ -409,7 +420,7 @@ void __kmp_terminate_thread(int gtid) {
 static kmp_int32 __kmp_set_stack_info(int gtid, kmp_info_t *th) {
   int stack_data;
 #if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD ||     \
-    KMP_OS_HURD
+    KMP_OS_HURD || KMP_OS_SOLARIS
   pthread_attr_t attr;
   int status;
   size_t size = 0;
@@ -448,7 +459,7 @@ static kmp_int32 __kmp_set_stack_info(int gtid, kmp_info_t *th) {
     return TRUE;
   }
 #endif /* KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD  \
-          || KMP_OS_HURD */
+          || KMP_OS_HURD || KMP_OS_SOLARIS */
   /* Use incremental refinement starting from initial conservative estimate */
   TCW_PTR(th->th.th_info.ds.ds_stacksize, 0);
   TCW_PTR(th->th.th_info.ds.ds_stackbase, &stack_data);
@@ -1813,7 +1824,7 @@ static int __kmp_get_xproc(void) {
   __kmp_type_convert(sysconf(_SC_NPROCESSORS_CONF), &(r));
 
 #elif KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD || KMP_OS_OPENBSD || \
-    KMP_OS_HURD
+    KMP_OS_HURD || KMP_OS_SOLARIS
 
   __kmp_type_convert(sysconf(_SC_NPROCESSORS_ONLN), &(r));
 
@@ -2189,9 +2200,9 @@ int __kmp_is_address_mapped(void *addr) {
     }
     kiv.kve_start += 1;
   }
-#elif KMP_OS_DRAGONFLY
+#elif KMP_OS_DRAGONFLY || KMP_OS_SOLARIS
 
-  // FIXME(DragonFly): Implement this
+  // FIXME(DragonFly, Solaris): Implement this
   found = 1;
 
 #else
@@ -2207,7 +2218,7 @@ int __kmp_is_address_mapped(void *addr) {
 #ifdef USE_LOAD_BALANCE
 
 #if KMP_OS_DARWIN || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD ||    \
-    KMP_OS_OPENBSD
+    KMP_OS_OPENBSD || KMP_OS_SOLARIS
 
 // The function returns the rounded value of the system load average
 // during given time interval which depends on the value of