gcc/testsuite/gcc.target/powerpc/pr65787.c

   1 /* { dg-do compile { target { powerpc64le-*-* } } } */
   2 /* { dg-options "-mdejagnu-cpu=power8 -O3" } */
   3 /* { dg-final { scan-assembler "xxsldwi \[0-9\]*,\[0-9\]*,\[0-9\]*,3" } } */
   4 /* { dg-final { scan-assembler-not "xxpermdi" } } */
   5
   6 /* This test verifies that a vector extract operand properly has its
   7    lane changed by the swap optimization.  Element 2 of LE corresponds
   8    to element 1 of BE.  When doublewords are swapped, this becomes
   9    element 3 of BE, so we need to shift the vector left by 3 words
  10    to be able to extract the correct value from BE element zero.  */
  11
  12 typedef float  v4f32 __attribute__ ((__vector_size__ (16)));
  13
  14 void foo (float);
  15 extern v4f32 x, y;
  16
  17 int main() {
  18   v4f32 z = x + y;
  19   foo (z[2]);
  20 }