clang/test/OpenMP/metadirective_empty.cpp

   1 // RUN: %clang_cc1 -verify -fopenmp -x c++ -triple x86_64-unknown-linux -emit-llvm %s -fexceptions -fcxx-exceptions -o - | FileCheck %s
   2 // RUN: %clang_cc1 -verify -fopenmp -x c++ -triple aarch64-unknown-linux -emit-llvm %s -fexceptions -fcxx-exceptions -o - | FileCheck %s
   3 // RUN: %clang_cc1 -verify -fopenmp -x c++ -triple ppc64le-unknown-linux -emit-llvm %s -fexceptions -fcxx-exceptions -o - | FileCheck %s
   4 // expected-no-diagnostics
   5
   6 #ifndef HEADER
   7 #define HEADER
   8
   9 #define N 1000
  10 void func() {
  11   // Test where a valid when clause contains empty directive.
  12   // The directive will be ignored and code for a serial for loop will be generated.
  13 #pragma omp metadirective when(implementation = {vendor(llvm)} \
  14                                :) default(parallel for)
  15   for (int i = 0; i < N; i++)
  16     ;
  17 }
  18
  19 // CHECK-LABEL: void @_Z4funcv()
  20 // CHECK: entry:
  21 // CHECK:   [[I:%.+]] = alloca i32,
  22 // CHECK:   store i32 0, ptr [[I]],
  23 // CHECK:   br label %[[FOR_COND:.+]]
  24 // CHECK: [[FOR_COND]]:
  25 // CHECK:   [[ZERO:%.+]] = load i32, ptr [[I]],
  26 // CHECK:   [[CMP:%.+]] = icmp slt i32 [[ZERO]], 1000
  27 // CHECK:   br i1 [[CMP]], label %[[FOR_BODY:.+]], label %[[FOR_END:.+]]
  28 // CHECK: [[FOR_BODY]]:
  29 // CHECK:   br label %[[FOR_INC:.+]]
  30 // CHECK: [[FOR_INC]]:
  31 // CHECK:   [[ONE:%.+]] = load i32, ptr [[I]],
  32 // CHECK:   [[INC:%.+]] = add nsw i32 [[ONE]], 1
  33 // CHECK:   store i32 [[INC]], ptr [[I]],
  34 // CHECK:   br label %[[FOR_COND]],
  35 // CHECK: [[FOR_END]]:
  36 // CHECK:   ret void
  37 // CHECK: }
  38
  39 #endif