[PATCH] Fix PR49603

[Richard Guenther]

This fixes PR49603.

Bootstrapped and tested on x86_64-unknown-linux-gnu, applied to trunk.

Richard.

2011-07-01  Richard Guenther  <rguent...@suse.de>

        PR tree-optimization/49603
        * tree-vect-stmts.c (vectorizable_load): Remove unnecessary
        assert.

        * gcc.dg/torture/pr49603.c: New testcase.

Index: gcc/tree-vect-stmts.c
===================================================================
--- gcc/tree-vect-stmts.c       (revision 175709)
+++ gcc/tree-vect-stmts.c       (working copy)
@@ -4574,19 +4574,14 @@ vectorizable_load (gimple stmt, gimple_s
              /* 4. Handle invariant-load.  */
              if (inv_p && !bb_vinfo)
                {
+                 tree vec_inv;
+                 gimple_stmt_iterator gsi2 = *gsi;
                  gcc_assert (!strided_load);
-                 if (j == 0)
-                   {
-                     tree vec_inv;
-                     gimple_stmt_iterator gsi2 = *gsi;
-                     gsi_next (&gsi2);
-                     vec_inv = build_vector_from_val (vectype, scalar_dest);
-                     new_temp = vect_init_vector (stmt, vec_inv,
-                                                  vectype, &gsi2);
-                     new_stmt = SSA_NAME_DEF_STMT (new_temp);
-                   }
-                 else
-                   gcc_unreachable (); /* FORNOW. */
+                 gsi_next (&gsi2);
+                 vec_inv = build_vector_from_val (vectype, scalar_dest);
+                 new_temp = vect_init_vector (stmt, vec_inv,
+                                              vectype, &gsi2);
+                 new_stmt = SSA_NAME_DEF_STMT (new_temp);
                }
 
              if (negative)
Index: gcc/testsuite/gcc.dg/torture/pr49603.c
===================================================================
--- gcc/testsuite/gcc.dg/torture/pr49603.c      (revision 0)
+++ gcc/testsuite/gcc.dg/torture/pr49603.c      (revision 0)
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+
+struct gl_visual {
+    float AlphaScale;
+};
+struct gl_context {
+    struct gl_visual *Visual;
+};
+void quickdraw_rgb( struct gl_context * ctx,
+                   int width, int height)
+{
+  int i, j;
+  unsigned char alpha[1600];
+  for (j=0; j<width; j++)
+    alpha[j] = (int) ctx->Visual->AlphaScale; 
+  for (i=0; i<height; i++)
+    foo( alpha);
+}
+