re PR tree-optimization/33597 (Internal compiler error while compiling libswscale from ffmpeg)

        PR tree-optimization/33597
        * tree-vect-analyze.c (vect_build_slp_tree): Check if optab handler
        for LSHIFT_EXPR and RSHIFT_EXPR is available for vec_mode.

testsuite/ChangeLog:

        PR tree-optimization/33597
        * gcc.dg/vect/pr33597.c: New testcase.

From-SVN: r128891

gcc/ChangeLog

+2007-09-30  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR tree-optimization/33597
+	* tree-vect-analyze.c (vect_build_slp_tree): Check if optab handler
+	for LSHIFT_EXPR and RSHIFT_EXPR is available for vec_mode.
+
 2007-09-28  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.c (ix86_expand_move): Use can_create_pseudo_p ()

gcc/testsuite/ChangeLog

+2007-09-30  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR tree-optimization/33597
+	* gcc.dg/vect/pr33597.c: New testcase.
+
 2007-09-29  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.target/i386/sse5-convert.c: Fix target selector and rename to...

gcc/testsuite/gcc.dg/vect/pr33597.c

+/* { dg-do compile } */
+
+typedef unsigned char uint8_t;
+typedef unsigned short uint16_t;
+
+void
+rgb15to24_C (const uint8_t * src, uint8_t * dst, long src_size)
+{
+  const uint16_t *end;
+  const uint16_t *s = (uint16_t *)src;
+  uint8_t *d = (uint8_t *)dst;
+
+  end = s + src_size/2;
+  while (s < end)
+    {
+      uint16_t bgr = *s++;
+
+      *d++ = (bgr&0x1F)<<3;
+      *d++ = (bgr&0x3E0)>>2;
+      *d++ = (bgr&0x7C00)>>7;
+    }
+}
+
+/* { dg-final { cleanup-tree-dump "vect" } } */

gcc/tree-vect-analyze.c

@@ -2696,6 +2696,13 @@ vect_build_slp_tree (loop_vec_info loop_vinfo, slp_tree *node,
 		  return false;
 		}
 	      icode = (int) optab->handlers[(int) vec_mode].insn_code;
+	      if (icode == CODE_FOR_nothing)
+		{
+		  if (vect_print_dump_info (REPORT_SLP))
+		    fprintf (vect_dump,
+			     "Build SLP failed: op not supported by target.");
+		  return false;
+		}
 	      optab_op2_mode = insn_data[icode].operand[2].mode;
 	      if (!VECTOR_MODE_P (optab_op2_mode))
 		{