re PR target/50202 (ICE: in final_scan_insn, at final.c:2709 (could not split…

re PR target/50202 (ICE: in final_scan_insn, at final.c:2709 (could not split insn) with __builtin_ia32_pcmpistri128)

	PR target/50202
	* config/i386/sse.md (sse4_2_pcmpestr): Emit NOTE_INSN_DELETED note
	when all outputs are unused.
	(sse4_2_pcmpestr): Ditto.

testsuite/ChangeLog:

	PR target/50202
	* gcc.target/i386/pr50202.c: New test.

From-SVN: r178130

gcc/ChangeLog

+2011-08-27  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/50202
+	* config/i386/sse.md (sse4_2_pcmpestr): Emit NOTE_INSN_DELETED note
+	when all outputs are unused.
+	(sse4_2_pcmpestr): Ditto.
+
 2011-08-26  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.md (round<mode>2): New expander.

gcc/config/i386/sse.md

@@ -9734,6 +9734,9 @@
 					   operands[2], operands[3],
 					   operands[4], operands[5],
 					   operands[6]));
+  if (!(flags || ecx || xmm0))
+    emit_note (NOTE_INSN_DELETED);
+
   DONE;
 }
   [(set_attr "type" "sselog")
@@ -9861,6 +9864,9 @@
     emit_insn (gen_sse4_2_pcmpistr_cconly (NULL, NULL,
 					   operands[2], operands[3],
 					   operands[4]));
+  if (!(flags || ecx || xmm0))
+    emit_note (NOTE_INSN_DELETED);
+
   DONE;
 }
   [(set_attr "type" "sselog")

gcc/testsuite/ChangeLog

+2011-08-27  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/50202
+	* gcc.target/i386/pr50202.c: New test.
+
 2011-08-26  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.target/i386/sse_4_1-round-vec.c: New test.

gcc/testsuite/gcc.target/i386/pr50202.c

+/* { dg-do compile } */
+/* { dg-options "-O -fno-tree-dse -fno-dce -msse4" } */
+/* { dg-require-effective-target sse4 } */
+
+typedef char __v16qi __attribute__ ((__vector_size__ (16)));
+
+__v16qi v;
+int i;
+
+void
+foo (void)
+{
+  i = __builtin_ia32_pcmpistri128 (v, v, 255);
+  i = 255;
+}