rs6000-p8swap.c (rtx_is_swappable_p): Don't swap vpmsumd.

[gcc]

2019-10-01  Bill Schmidt  <wschmidt@linux.ibm.com>

	* config/rs6000/rs6000-p8swap.c (rtx_is_swappable_p): Don't swap
	vpmsumd.

[gcc/testsuite]

2019-10-01  Bill Schmidt  <wschmdit@linux.ibm.com>

	* gcc.target/powerpc/pr91275.c: New.

From-SVN: r276410

gcc/ChangeLog

+2019-10-01  Bill Schmidt  <wschmidt@linux.ibm.com>
+
+	* config/rs6000/rs6000-p8swap.c (rtx_is_swappable_p): Don't swap
+	vpmsumd.
+
 2019-10-01  Ilya Leoshkevich  <iii@linux.ibm.com>
 
 	PR target/77918

gcc/config/rs6000/rs6000-p8swap.c

@@ -791,6 +791,11 @@ rtx_is_swappable_p (rtx op, unsigned int *special)
 	  case UNSPEC_REDUC_PLUS:
 	  case UNSPEC_REDUC:
 	    return 1;
+	  case UNSPEC_VPMSUM:
+	    /* vpmsumd is not swappable, but vpmsum[bhw] are.  */
+	    if (GET_MODE (op) == V2DImode)
+	      return 0;
+	    break;
 	  }
       }
 

gcc/testsuite/ChangeLog

+2019-10-01  Bill Schmidt  <wschmdit@linux.ibm.com>
+
+	* gcc.target/powerpc/pr91275.c: New.
+
 2019-10-01  Alexandre Oliva <oliva@adacore.com>
 
 	* gcc.dg/torture/pr41094.c: Introduce intermediate variable.

gcc/testsuite/gcc.target/powerpc/pr91275.c

+/* Test that we generate vpmsumd correctly without a swap error.  */
+
+/* { dg-do run { target { p8vector_hw } } } */
+/* { dg-options "-O2 -std=gnu11" } */
+
+#include <altivec.h>
+
+int main() {
+
+  const unsigned long long r0l = 0x8e7dfceac070e3a0;
+  vector unsigned long long r0 = (vector unsigned long long) {r0l, 0}, v;
+  const vector unsigned long long pd
+    = (vector unsigned long) {0xc2LLU << 56, 0};
+
+  v = __builtin_crypto_vpmsumd ((vector unsigned long long) {r0[0], 0}, pd);
+
+  if (v[0] != 0x4000000000000000 || v[1] != 0x65bd7ab605a4a8ff)
+    __builtin_abort ();
+
+  return 0;
+}