commit d2d9e71d2dcdb51fbf05bbb06e316e0db95976e6
Author: eoseret <eoseret@XPS-8930>
Date:   Wed Sep 28 10:28:58 2022 +0200

    IntelLLVM compilers support

diff --git a/CMake/IntelLLVMCompilers.cmake b/CMake/IntelLLVMCompilers.cmake
new file mode 100644
index 0000000..f5e76c1
--- /dev/null
+++ b/CMake/IntelLLVMCompilers.cmake
@@ -0,0 +1,61 @@
+# Check compiler version
+IF ( CMAKE_CXX_COMPILER_VERSION VERSION_LESS 21.0 )
+MESSAGE(FATAL_ERROR "Requires Intel 21.0 or higher ")
+ENDIF()
+
+# Enable OpenMP
+IF(QMC_OMP)
+  SET(ENABLE_OPENMP 1)
+  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fiopenmp")
+ENDIF(QMC_OMP)
+
+# Set clang specfic flags (which we always want)
+ADD_DEFINITIONS( -Drestrict=__restrict__ )
+
+SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fomit-frame-pointer -fstrict-aliasing -D__forceinline=inline")
+SET( HAVE_POSIX_MEMALIGN 0 )    # Clang doesn't support -malign-double
+
+# Set extra optimization specific flags
+SET( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -ffast-math" )
+SET( CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -ffast-math" )
+
+#------------------------
+# Not on Cray's machine
+#------------------------
+IF(NOT $ENV{CRAYPE_VERSION} MATCHES ".")
+
+SET(X_OPTION "^-x| -x")
+SET(AX_OPTION "^-ax| -ax")
+#check if the user has already specified -x option for cross-compiling.
+if(NOT (CMAKE_CXX_FLAGS MATCHES ${X_OPTION} OR CMAKE_CXX_FLAGS MATCHES ${AX_OPTION}))
+  #check if -xHost is accepted
+  CHECK_CXX_COMPILER_FLAG( "-xHost" INTEL_CXX_FLAGS )
+  IF(INTEL_CXX_FLAGS)
+    SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -xHost")
+  ENDIF(INTEL_CXX_FLAGS)
+endif() #(CMAKE_CXX_FLAGS MATCHES "-x" OR CMAKE_CXX_FLAGS MATCHES "-ax")
+
+ENDIF(NOT $ENV{CRAYPE_VERSION} MATCHES ".")
+
+# Add static flags if necessary
+IF(QMC_BUILD_STATIC)
+    SET(CMAKE_CXX_LINK_FLAGS " -static")
+ENDIF(QMC_BUILD_STATIC)
+
+# Coverage
+IF (ENABLE_GCOV)
+  SET(GCOV_COVERAGE TRUE)
+  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --coverage")
+  SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --coverage")
+  SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} --coverage")
+ENDIF(ENABLE_GCOV)
+
+SET(XRAY_PROFILE FALSE CACHE BOOL "Use llvm xray profiling")
+SET(XRAY_INSTRUCTION_THRESHOLD 200 CACHE STRING "Instruction threshold for xray instrumentation")
+
+IF(XRAY_PROFILE)
+  set(XRAY_FLAGS "-fxray-instrument -fxray-instruction-threshold=${XRAY_INSTRUCTION_THRESHOLD}")
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${XRAY_FLAGS}")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${XRAY_FLAGS}")
+  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${XRAY_FLAGS}")
+ENDIF(XRAY_PROFILE)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cec2a7b..931d2b0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -219,6 +219,8 @@ ELSE(CMAKE_TOOLCHAIN_FILE)
       SET( COMPILER GNU )
     ELSEIF( CMAKE_CXX_COMPILER_ID MATCHES "XL" )
       SET( COMPILER IBM )
+    ELSEIF( CMAKE_CXX_COMPILER_ID MATCHES "LLVM" )
+      SET( COMPILER IntelLLVM )
     ELSEIF( CMAKE_CXX_COMPILER_ID MATCHES "Intel" )
       SET( COMPILER Intel )
     ELSEIF( CMAKE_CXX_COMPILER_ID MATCHES "PGI" )
@@ -242,6 +244,8 @@ ELSE(CMAKE_TOOLCHAIN_FILE)
   #------------------------------------
   IF( ${COMPILER} MATCHES "IBM" )
     INCLUDE(${PROJECT_CMAKE}/IBMCompilers.cmake)
+  ELSEIF( ${COMPILER} MATCHES "IntelLLVM" )
+    INCLUDE(${PROJECT_CMAKE}/IntelLLVMCompilers.cmake)
   ELSEIF( ${COMPILER} MATCHES "Intel" )
     INCLUDE(${PROJECT_CMAKE}/IntelCompilers.cmake)
   ELSEIF( ${COMPILER} MATCHES "GNU" )
diff --git a/src/Numerics/Spline2/MultiBspline.hpp b/src/Numerics/Spline2/MultiBspline.hpp
index d687d2f..62b4c5b 100644
--- a/src/Numerics/Spline2/MultiBspline.hpp
+++ b/src/Numerics/Spline2/MultiBspline.hpp
@@ -120,7 +120,7 @@ evaluate_vgl(const typename bspline_traits<T, 3>::SplineType* restrict spline_m,
       const T* restrict coefs3zs = coefs + 3 * zs;
       ASSUME_ALIGNED(coefs3zs);
 
-#pragma noprefetch
+      //#pragma noprefetch
 #pragma omp simd
       for (int n = 0; n < num_splines; n++)
       {