re PR middle-end/63762 ([ARM]GCC generates UNPREDICTABLE STR with Rn = Rt when hard-float abi is used)

2014-11-19  Renlin Li  <Renlin.Li@arm.com>

        PR middle-end/63762
        * ira.c (ira): Update preferred class. 

        * gcc.dg/pr63762.c: New test.

From-SVN: r217783

gcc/ChangeLog

@@ -1,3 +1,8 @@
+2014-11-19  Renlin Li  <Renlin.Li@arm.com>
+
+    PR middle-end/63762
+	* ira.c (ira): Update preferred class.
+
 2014-11-19  Jakub Jelinek  <jakub@redhat.com>
 
 	* gimple.h (gimple_build_assign_with_ops): Add unary arg overload.

gcc/ira.c

@@ -5263,7 +5263,18 @@ ira (FILE *f)
 	      ira_allocno_iterator ai;
 
 	      FOR_EACH_ALLOCNO (a, ai)
-		ALLOCNO_REGNO (a) = REGNO (ALLOCNO_EMIT_DATA (a)->reg);
+                {
+                  int old_regno = ALLOCNO_REGNO (a);
+                  int new_regno = REGNO (ALLOCNO_EMIT_DATA (a)->reg);
+
+                  ALLOCNO_REGNO (a) = new_regno;
+
+                  if (old_regno != new_regno)
+                    setup_reg_classes (new_regno, reg_preferred_class (old_regno),
+                                       reg_alternate_class (old_regno),
+                                       reg_allocno_class (old_regno));
+                }
+
 	    }
 	  else
 	    {

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2014-11-19  Renlin Li  <Renlin.Li@arm.com>
+
+    PR middle-end/63762
+	* gcc.dg/pr63762.c: New test. 
+
 2014-11-19  Marek Polacek  <polacek@redhat.com>
 
 	PR sanitizer/63690

gcc/testsuite/gcc.dg/pr63762.c

@@ -0,0 +1,77 @@
+/* PR middle-end/63762 */
+/* { dg-do assemble } */
+/* { dg-options "-O2" } */
+
+#include <stdlib.h>
+
+void *astFree ();
+void *astMalloc ();
+void astNegate (void *);
+int astGetNegated (void *);
+void astGetRegionBounds (void *, double *, double *);
+int astResampleF (void *, ...);
+
+extern int astOK;
+
+int
+MaskF (int inside, int ndim, const int lbnd[], const int ubnd[],
+       float in[], float val)
+{
+
+  void *used_region;
+  float *c, *d, *out, *tmp_out;
+  double *lbndgd, *ubndgd;
+  int *lbndg, *ubndg, idim, ipix, nax, nin, nout, npix, npixg, result = 0;
+  if (!astOK) return result;
+  lbndg = astMalloc (sizeof (int)*(size_t) ndim);
+  ubndg = astMalloc (sizeof (int)*(size_t) ndim);
+  lbndgd = astMalloc (sizeof (double)*(size_t) ndim);
+  ubndgd = astMalloc (sizeof (double)*(size_t) ndim);
+  if (astOK)
+    {
+      astGetRegionBounds (used_region, lbndgd, ubndgd);
+      npix = 1;
+      npixg = 1;
+      for (idim = 0; idim < ndim; idim++)
+        {
+          lbndg[ idim ] = lbnd[ idim ];
+          ubndg[ idim ] = ubnd[ idim ];
+          npix *= (ubnd[ idim ] - lbnd[ idim ] + 1);
+          if (npixg >= 0) npixg *= (ubndg[ idim ] - lbndg[ idim ] + 1);
+        }
+      if (npixg <= 0 && astOK)
+        {
+          if ((inside != 0) == (astGetNegated( used_region ) != 0))
+            {
+              c = in;
+              for (ipix = 0; ipix < npix; ipix++) *(c++) = val;
+              result = npix;
+            }
+        }
+      else if (npixg > 0 && astOK)
+        {
+          if ((inside != 0) == (astGetNegated (used_region) != 0))
+            {
+              tmp_out = astMalloc (sizeof (float)*(size_t) npix);
+              if (tmp_out)
+                {
+                  c = tmp_out;
+                  for (ipix = 0; ipix < npix; ipix++) *(c++) = val;
+                  result = npix - npixg;
+                }
+              out = tmp_out;
+            }
+          else
+            {
+              tmp_out = NULL;
+              out = in;
+            }
+          if (inside) astNegate (used_region);
+          result += astResampleF (used_region, ndim, lbnd, ubnd, in, NULL,
+                                  NULL, NULL, 0, 0.0, 100, val, ndim,
+                                  lbnd, ubnd, lbndg, ubndg, out, NULL);
+          if (inside) astNegate (used_region);
+        }
+    }
+  return result;
+}