clang/test/Frontend/optimization-remark-analysis.c

   1 // RUN: %clang -O1 -fvectorize -target x86_64-unknown-unknown -emit-llvm -Rpass-analysis -S %s -o - 2>&1 | FileCheck %s --check-prefix=RPASS
   2 // RUN: %clang -O1 -fvectorize -target x86_64-unknown-unknown -emit-llvm -S %s -o - 2>&1 | FileCheck %s
   3
   4 // RPASS: {{.*}}:12:5: remark: loop not vectorized: loop contains a switch statement
   5 // CHECK-NOT: remark: loop not vectorized: loop contains a switch statement
   6
   7 double foo(int N, int *Array) {
   8   double v = 0.0;
   9
  10   #pragma clang loop vectorize(enable)
  11   for (int i = 0; i < N; i++) {
  12     switch(Array[i]) {
  13     case 0: v += 1.0f; break;
  14     case 1: v -= 0.5f; break;
  15     case 2: v *= 2.0f; break;
  16     default: v = 0.0f;
  17     }
  18   }
  19
  20   return v;
  21 }