add reduction, unnamed/named critical sections, extra compilation uni…

.gitignore

@@ -1,2 +1,4 @@
 build
 *.wasm
+build-em
+wasi-sdk*

.gitmodules

@@ -3,3 +3,6 @@
 	url = https://github.com/llvm/llvm-project
 	branch = main
 	shallow = true
+[submodule "emsdk"]
+	path = emsdk
+	url = https://github.com/emscripten-core/emsdk

Makefile

@@ -30,7 +30,7 @@ example.wasm: example.c $(OPENMP_LIB)
 	make check-wasi-sdk
 	$(WASI_CC) -fopenmp=libomp -g --sysroot=$(WASI_SYSROOT) --target=wasm32-wasi-threads \
 	  -I$(BUILD_DIR)/runtime/src -I$(WASI_SYSROOT)/include -pthread \
-	  -Wl,--import-memory,--export-memory,--max-memory=67108864 example.c \
+	  -Wl,--import-memory,--export-memory,--max-memory=67108864 example.c other.c \
 	  -L$(BUILD_DIR)/runtime/src -lomp \
 	  -lwasi-emulated-getpid \
 	  -o example.wasm

emscripten.sh

@@ -0,0 +1,44 @@
+#!/bin/bash -e
+set -e
+
+PROJECT_DIR=`realpath .`
+EMSDK_DIR=$PROJECT_DIR/emsdk
+BUILD_DIR=build-em
+OPENMP_DIR=${OPENMP_DIR:=$PROJECT_DIR/llvm-project/openmp}
+OPENMP_LIB=$BUILD_DIR/lib/libomp.a
+
+mkdir -p $BUILD_DIR
+
+./emsdk/emsdk install latest
+./emsdk/emsdk activate latest
+source $EMSDK_DIR/emsdk_env.sh
+
+export CFLAGS="-pthread"
+export CXXFLAGS="-pthread"
+emcmake cmake \
+    -DOPENMP_STANDALONE_BUILD=ON \
+    -DOPENMP_ENABLE_OMPT_TOOLS=OFF \
+    -DOPENMP_ENABLE_LIBOMPTARGET=OFF \
+    -DLIBOMP_HAVE_OMPT_SUPPORT=OFF \
+    -DLIBOMP_OMPT_SUPPORT=OFF \
+    -DLIBOMP_OMPD_SUPPORT=OFF \
+    -DLIBOMP_USE_DEBUGGER=OFF \
+    -DLIBOMP_FORTRAN_MODULES=OFF \
+    -DLIBOMP_ENABLE_SHARED=OFF \
+    -DCMAKE_INSTALL_PREFIX=$BUILD_DIR \
+    -B $BUILD_DIR \
+    -S $OPENMP_DIR
+
+emmake make -C $BUILD_DIR -j
+emmake make install -C $BUILD_DIR
+
+echo
+echo "!!! adjust clang being used you will need to update the clang in $EMSDK_DIR/upstream/bin !!!"
+echo
+
+echo "Building example..."
+
+emcc -I$BUILD_DIR/include $OPENMP_LIB -fopenmp=libomp -pthread example.c other.c -o $BUILD_DIR/example.js
+
+echo "Running example..."
+node $BUILD_DIR/example.js

example.c

@@ -1,7 +1,27 @@
 #include <omp.h>
 #include <stdio.h>
 
+extern void InvokeOther();
+
 int main(int argc, char** argv) {
-#pragma omp parallel num_threads(8)
-  { printf("Hello World... from thread = %d\n", omp_get_thread_num()); }
+  int critical_unamed = 0;
+  int critical_named = 0;
+  int reduction = 0;
+#pragma omp parallel num_threads(8) reduction(+ : reduction) 
+  {
+    printf("Hello World... from thread = %d\n", omp_get_thread_num()); 
+    #pragma omp critical 
+    {
+      ++critical_unamed;
+    }
+    #pragma omp critical (NAME)
+    {
+      ++critical_named;
+    }
+    ++reduction;
+  }
+  printf("example.c critical_unamed: %d\n", critical_unamed); 
+  printf("example.c critical_named: %d\n", critical_named); 
+  printf("example.c reduction: %d\n", reduction);
+  InvokeOther();
 }

other.c

@@ -0,0 +1,23 @@
+#include <omp.h>
+#include <stdio.h>
+
+void InvokeOther() {
+  int critical_unamed = 0;
+  int critical_named = 0;
+  int reduction = 0;
+#pragma omp parallel num_threads(8) reduction(+ : reduction)
+  {
+    #pragma omp critical 
+    {
+      ++critical_unamed;
+    }
+    #pragma omp critical (NAME)
+    {
+      ++critical_named;
+    }
+    ++reduction;
+  }
+  printf("other.c critical_unamed: %d\n", critical_unamed); 
+  printf("other.c critical_named: %d\n", critical_named); 
+  printf("other.c reduction: %d\n", reduction); 
+}