clang/test/CodeGenCXX/pragma-loop-safety-nested.cpp

   1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s | FileCheck %s
   2
   3 // Verify that the outer loop has the llvm.access.group property for the
   4 // accesses outside and inside the inner loop.
   5 void vectorize_nested_test(int *List, int Length) {
   6 #pragma clang loop vectorize(assume_safety) interleave(disable) unroll(disable)
   7   for (int i = 0; i < Length; ++i) {
   8 #pragma clang loop vectorize(assume_safety) interleave(disable) unroll(disable)
   9     for (int j = 0; j < Length; ++j)
  10       List[i * Length + j] = (i + j) * 2;
  11   }
  12 }
  13
  14
  15 // CHECK: load i32, i32* %Length.addr, align 4, !llvm.access.group ![[ACCESS_GROUP_2:[0-9]+]]
  16 // CHECK: %[[MUL:.+]] = mul
  17 // CHECK: store i32 %[[MUL]], i32* %{{.+}}, !llvm.access.group ![[ACCESS_GROUP_LIST_3:[0-9]+]]
  18 // CHECK: br label %{{.+}}, !llvm.loop ![[INNER_LOOPID:[0-9]+]]
  19 // CHECK: br label %{{.+}}, !llvm.loop ![[OUTER_LOOPID:[0-9]+]]
  20
  21 // CHECK: ![[ACCESS_GROUP_2]] = distinct !{}
  22 // CHECK: ![[ACCESS_GROUP_LIST_3]] = !{![[ACCESS_GROUP_2]], ![[ACCESS_GROUP_4:[0-9]+]]}
  23 // CHECK: ![[ACCESS_GROUP_4]] = distinct !{}
  24 // CHECK: ![[INNER_LOOPID]] = distinct !{![[INNER_LOOPID]], [[MP:![0-9]+]], ![[PARALLEL_ACCESSES_8:[0-9]+]]
  25 // CHECK: ![[PARALLEL_ACCESSES_8]] = !{!"llvm.loop.parallel_accesses", ![[ACCESS_GROUP_4]]}
  26 // CHECK: ![[OUTER_LOOPID]] = distinct !{![[OUTER_LOOPID]], [[MP]], ![[PARALLEL_ACCESSES_10:[0-9]+]]
  27 // CHECK: ![[PARALLEL_ACCESSES_10]] = !{!"llvm.loop.parallel_accesses", ![[ACCESS_GROUP_2]]}