Fix PR 47755

From-SVN: r170189

gcc/ChangeLog

+2011-02-15  Michael Meissner  <meissner@linux.vnet.ibm.com>
+
+	PR target/47755
+	* config/rs6000/predicates.md (easy_vector_constant): Allow V2DI
+	mode for vector constants.  Remove code that checks for TImode.
+
 2011-02-15  Alexandre Oliva  <aoliva@redhat.com>
 
 	PR debug/47106

gcc/config/rs6000/predicates.md

@@ -328,13 +328,11 @@
   if (TARGET_PAIRED_FLOAT)
     return false;
 
-  if ((VSX_VECTOR_MODE (mode) || mode == TImode) && zero_constant (op, mode))
-    return true;
-
-  if (ALTIVEC_VECTOR_MODE (mode))
+  if (VECTOR_MEM_ALTIVEC_OR_VSX_P (mode))
     {
       if (zero_constant (op, mode))
 	return true;
+
       return easy_altivec_constant (op, mode);
     }
 

gcc/testsuite/ChangeLog

+2011-02-15  Michael Meissner  <meissner@linux.vnet.ibm.com>
+
+	PR target/47755
+	* gcc.target/powerpc/pr47755.c: New file, test all 0 vector
+	constant does not generate a load from memory.
+
 2011-02-15  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR middle-end/47725

gcc/testsuite/gcc.target/powerpc/pr47755.c

+/* { dg-do compile { target { powerpc*-*-* } } } */
+/* { dg-skip-if "" { powerpc*-*-darwin* } { "*" } { "" } } */
+/* { dg-require-effective-target powerpc_vsx_ok } */
+/* { dg-options "-O3 -mcpu=power7" } */
+/* { dg-final { scan-assembler "xxlxor" } } */
+/* { dg-final { scan-assembler-not "lxvd2x" } } */
+/* { dg-final { scan-assembler-not "lxvw4x" } } */
+/* { dg-final { scan-assembler-not "lvx" } } */
+
+/* PR 47755: Compiler loads vector constant of 0 from TOC instead of using
+   xxlxor.  */
+void
+func (vector long long *p)
+{
+  *p = (vector long long) { 0LL, 0LL };
+}