re PR tree-optimization/46728 (GCC does not generate fmadd for pow (x, 0.75)+y on powerpc)

2011-05-27  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/46728
	* gcc.target/powerpc/pr46728-1.c: New.
	* gcc.target/powerpc/pr46728-2.c: New.
	* gcc.target/powerpc/pr46728-3.c: New.
	* gcc.target/powerpc/pr46728-4.c: New.
	* gcc.target/powerpc/pr46728-5.c: New.
	* gcc.dg/pr46728-6.c: New.
	* gcc.target/powerpc/pr46728-7.c: New.
	* gcc.target/powerpc/pr46728-8.c: New.
	* gcc.dg/pr46728-9.c: New.
	* gcc.target/powerpc/pr46728-10.c: New.
	* gcc.target/powerpc/pr46728-11.c: New.
	* gcc.dg/pr46728-12.c: New.
	* gcc.target/powerpc/pr46728-13.c: New.
	* gcc.target/powerpc/pr46728-14.c: New.
	* gcc.target/powerpc/pr46728-15.c: New.
	* gcc.target/powerpc/pr46728-16.c: New.

From-SVN: r174358

gcc/testsuite/ChangeLog

+2011-05-27  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
+
+	PR tree-optimization/46728
+	* gcc.target/powerpc/pr46728-1.c: New.
+	* gcc.target/powerpc/pr46728-2.c: New.
+	* gcc.target/powerpc/pr46728-3.c: New.
+	* gcc.target/powerpc/pr46728-4.c: New.
+	* gcc.target/powerpc/pr46728-5.c: New.
+	* gcc.dg/pr46728-6.c: New.
+	* gcc.target/powerpc/pr46728-7.c: New.
+	* gcc.target/powerpc/pr46728-8.c: New.
+	* gcc.dg/pr46728-9.c: New.
+	* gcc.target/powerpc/pr46728-10.c: New.
+	* gcc.target/powerpc/pr46728-11.c: New.
+	* gcc.dg/pr46728-12.c: New.
+	* gcc.target/powerpc/pr46728-13.c: New.
+	* gcc.target/powerpc/pr46728-14.c: New.
+	* gcc.target/powerpc/pr46728-15.c: New.
+	* gcc.target/powerpc/pr46728-16.c: New.
+
 2011-05-27  Jason Merrill  <jason@redhat.com>
 
 	* g++.dg/abi/mangle47.C: New.

gcc/testsuite/gcc.dg/pr46728-12.c

+/* { dg-do run } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it (double x)
+{
+  return pow (x, 1.0 / 3.0);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 729.0, 64.0, .0008797 };
+  double PREC = 0.999999;
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    if (fabs (convert_it (values[i]) / cbrt (values[i])) < PREC)
+      abort ();
+
+  return 0;
+}

gcc/testsuite/gcc.dg/pr46728-6.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -lm" } */
+
+#include <math.h>
+
+int
+main (int argc, char *argv[])
+{
+  volatile double result;
+
+  result = pow (-0.0, 3.0);
+  result = pow (26.47, -2.0);
+  result = pow (0.0, 0.0);
+  result = pow (22.3, 1.0);
+  result = pow (33.2, -1.0);
+
+  return 0;
+}
+
+
+/* { dg-final { scan-assembler-not "pow" } } */

gcc/testsuite/gcc.dg/pr46728-9.c

+/* { dg-do run } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it (double x)
+{
+  return pow (x, 0.5);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 4.0, 256.0, .0008797 };
+  double PREC = 0.999999;
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    if (fabs (convert_it (values[i]) / sqrt (values[i])) < PREC)
+      abort ();
+
+  return 0;
+}
+

gcc/testsuite/gcc.target/powerpc/pr46728-1.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it (double x)
+{
+  return pow (x, 0.5);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 4.0, 256.0, .0008797 };
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    if (convert_it (values[i]) != sqrt (values[i]))
+      abort ();
+
+  return 0;
+}
+
+
+/* { dg-final { scan-assembler-times "fsqrt" 2 { target powerpc*-*-* } } } */
+/* { dg-final { scan-assembler-not "pow" { target powerpc*-*-* } } } */

gcc/testsuite/gcc.target/powerpc/pr46728-10.c

+/* { dg-do run } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it (double x)
+{
+  return pow (x, 0.25);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 4.0, 256.0, .0008797 };
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    if (convert_it (values[i]) != sqrt (sqrt (values[i])))
+      abort ();
+
+  return 0;
+}
+

gcc/testsuite/gcc.target/powerpc/pr46728-11.c

+/* { dg-do run } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it (double x)
+{
+  return pow (x, 0.75);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 4.0, 256.0, .0008797 };
+  double PREC = 0.999999;
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    {
+      volatile double x, y;
+      x = sqrt (values[i]);
+      y = sqrt (sqrt (values[i]));
+  
+      if (fabs (convert_it (values[i]) / (x * y)) < PREC)
+	abort ();
+    }
+
+  return 0;
+}

gcc/testsuite/gcc.target/powerpc/pr46728-13.c

+/* { dg-do run } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it (double x)
+{
+  return pow (x, 1.0 / 6.0);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 729.0, 64.0, .0008797 };
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    if (convert_it (values[i]) != cbrt (sqrt (values[i])))
+      abort ();
+
+  return 0;
+}

gcc/testsuite/gcc.target/powerpc/pr46728-14.c

+/* { dg-do run } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it_1 (double x)
+{
+  return pow (x, 1.5);
+}
+
+static double
+convert_it_2 (double x)
+{
+  return pow (x, 2.5);
+}
+
+static double
+convert_it_3 (double x)
+{
+  return pow (x, -0.5);
+}
+
+static double
+convert_it_4 (double x)
+{
+  return pow (x, 10.5);
+}
+
+static double
+convert_it_5 (double x)
+{
+  return pow (x, -3.5);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 4.0, 256.0, .0008797 };
+  double PREC = .999999;
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    {
+      volatile double x, y;
+
+      x = sqrt (values[i]);
+      y = __builtin_powi (values[i], 1);
+      if (fabs (convert_it_1 (values[i]) / (x * y)) < PREC)
+	abort ();
+
+      x = sqrt (values[i]);
+      y = __builtin_powi (values[i], 2);
+      if (fabs (convert_it_2 (values[i]) / (x * y)) < PREC)
+	abort ();
+
+      x = sqrt (values[i]);
+      y = __builtin_powi (values[i], -1);
+      if (fabs (convert_it_3 (values[i]) / (x * y)) < PREC)
+	abort ();
+
+      x = sqrt (values[i]);
+      y = __builtin_powi (values[i], 10);
+      if (fabs (convert_it_4 (values[i]) / (x * y)) < PREC)
+	abort ();
+
+      x = sqrt (values[i]);
+      y = __builtin_powi (values[i], -4);
+      if (fabs (convert_it_5 (values[i]) / (x * y)) < PREC)
+	abort ();
+    }
+
+  return 0;
+}

gcc/testsuite/gcc.target/powerpc/pr46728-15.c

+/* { dg-do run } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it_1 (double x)
+{
+  return pow (x, 10.0 / 3.0);
+}
+
+static double
+convert_it_2 (double x)
+{
+  return pow (x, 11.0 / 3.0);
+}
+
+static double
+convert_it_3 (double x)
+{
+  return pow (x, -7.0 / 3.0);
+}
+
+static double
+convert_it_4 (double x)
+{
+  return pow (x, -8.0 / 3.0);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 4.0, 256.0, .0008797 };
+  double PREC = .999999;
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    {
+      volatile double x, y;
+
+      x = __builtin_powi (values[i], 3);
+      y = __builtin_powi (cbrt (values[i]), 1);
+      if (fabs (convert_it_1 (values[i]) / (x * y)) < PREC)
+	abort ();
+
+      x = __builtin_powi (values[i], 3);
+      y = __builtin_powi (cbrt (values[i]), 2);
+      if (fabs (convert_it_2 (values[i]) / (x * y)) < PREC)
+	abort ();
+
+      x = __builtin_powi (values[i], -3);
+      y = __builtin_powi (cbrt (values[i]), 2);
+      if (fabs (convert_it_3 (values[i]) / (x * y)) < PREC)
+	abort ();
+
+      x = __builtin_powi (values[i], -3);
+      y = __builtin_powi (cbrt (values[i]), 1);
+      if (fabs (convert_it_4 (values[i]) / (x * y)) < PREC)
+	abort ();
+    }
+
+  return 0;
+}

gcc/testsuite/gcc.target/powerpc/pr46728-16.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -mcpu=power6" } */
+
+double foo (double x, double y)
+{
+  return __builtin_pow (x, 0.75) + y;
+}
+
+
+/* { dg-final { scan-assembler "fmadd" { target powerpc*-*-* } } } */

gcc/testsuite/gcc.target/powerpc/pr46728-2.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it (double x)
+{
+  return pow (x, 0.25);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 4.0, 256.0, .0008797 };
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    if (convert_it (values[i]) != sqrt (sqrt (values[i])))
+      abort ();
+
+  return 0;
+}
+
+
+/* { dg-final { scan-assembler-times "fsqrt" 4 { target powerpc*-*-* } } } */
+/* { dg-final { scan-assembler-not "pow" { target powerpc*-*-* } } } */

gcc/testsuite/gcc.target/powerpc/pr46728-3.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it (double x)
+{
+  return pow (x, 0.75);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 4.0, 256.0, .0008797 };
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    if (convert_it (values[i]) != sqrt(values[i]) * sqrt (sqrt (values[i])))
+      abort ();
+
+  return 0;
+}
+
+
+/* { dg-final { scan-assembler-times "sqrt" 4 { target powerpc*-*-* } } } */
+/* { dg-final { scan-assembler-not "pow" { target powerpc*-*-* } } } */

gcc/testsuite/gcc.target/powerpc/pr46728-4.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it (double x)
+{
+  return pow (x, 1.0 / 3.0);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 729.0, 64.0, .0008797 };
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    if (convert_it (values[i]) != cbrt (values[i]))
+      abort ();
+
+  return 0;
+}
+
+
+/* { dg-final { scan-assembler-times "cbrt" 2 { target powerpc*-*-* } } } */
+/* { dg-final { scan-assembler-not "pow" { target powerpc*-*-* } } } */

gcc/testsuite/gcc.target/powerpc/pr46728-5.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it (double x)
+{
+  return pow (x, 1.0 / 6.0);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 729.0, 64.0, .0008797 };
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    if (convert_it (values[i]) != cbrt (sqrt (values[i])))
+      abort ();
+
+  return 0;
+}
+
+
+/* { dg-final { scan-assembler-times "cbrt" 2 { target powerpc*-*-* } } } */
+/* { dg-final { scan-assembler-not " pow " { target powerpc*-*-* } } } */

gcc/testsuite/gcc.target/powerpc/pr46728-7.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it_1 (double x)
+{
+  return pow (x, 1.5);
+}
+
+static double
+convert_it_2 (double x)
+{
+  return pow (x, 2.5);
+}
+
+static double
+convert_it_3 (double x)
+{
+  return pow (x, -0.5);
+}
+
+static double
+convert_it_4 (double x)
+{
+  return pow (x, 10.5);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 4.0, 256.0, .0008797 };
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    {
+      if (convert_it_1 (values[i]) != sqrt (values[i]) * __builtin_powi (values[i], 1))
+	abort ();
+      if (convert_it_2 (values[i]) != sqrt (values[i]) * __builtin_powi (values[i], 2))
+	abort ();
+      if (convert_it_3 (values[i]) != sqrt (values[i]) * __builtin_powi (values[i], -1))
+	abort ();
+      if (convert_it_4 (values[i]) != sqrt (values[i]) * __builtin_powi (values[i], 10))
+	abort ();
+    }
+
+  return 0;
+}
+
+
+/* { dg-final { scan-assembler-times "sqrt" 5 { target powerpc*-*-* } } } */
+/* { dg-final { scan-assembler-not "pow" { target powerpc*-*-* } } } */

gcc/testsuite/gcc.target/powerpc/pr46728-8.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math -fno-inline -fno-unroll-loops -lm -mpowerpc-gpopt" } */
+
+#include <math.h>
+
+extern void abort (void);
+
+#define NVALS 6
+
+static double
+convert_it_1 (double x)
+{
+  return pow (x, 10.0 / 3.0);
+}
+
+static double
+convert_it_2 (double x)
+{
+  return pow (x, 11.0 / 3.0);
+}
+
+static double
+convert_it_3 (double x)
+{
+  return pow (x, -7.0 / 3.0);
+}
+
+static double
+convert_it_4 (double x)
+{
+  return pow (x, -8.0 / 3.0);
+}
+
+int
+main (int argc, char *argv[])
+{
+  double values[NVALS] = { 3.0, 1.95, 2.227, 4.0, 256.0, .0008797 };
+  unsigned i;
+
+  for (i = 0; i < NVALS; i++)
+    {
+      if (convert_it_1 (values[i]) != 
+	  __builtin_powi (values[i], 3) * __builtin_powi (cbrt (values[i]), 1))
+	abort ();
+      if (convert_it_2 (values[i]) != 
+	  __builtin_powi (values[i], 3) * __builtin_powi (cbrt (values[i]), 2))
+	abort ();
+      if (convert_it_3 (values[i]) != 
+	  __builtin_powi (values[i], -3) * __builtin_powi (cbrt (values[i]), 2))
+	abort ();
+      if (convert_it_4 (values[i]) !=
+	  __builtin_powi (values[i], -3) * __builtin_powi (cbrt (values[i]), 1))
+	abort ();
+    }
+
+  return 0;
+}
+
+
+/* { dg-final { scan-assembler-times "cbrt" 5 { target powerpc*-*-* } } } */
+/* { dg-final { scan-assembler-not "pow" { target powerpc*-*-* } } } */