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[4/n] loop distribution TLC

Message ID Pine.LNX.4.64.1206011335130.5860@jbgna.fhfr.qr
State New
Headers show

Commit Message

Richard Biener June 1, 2012, 11:35 a.m. UTC 
This fixes an oversight.

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

Richard.

2012-06-01  Richard Guenther  <rguenther@suse.de>

	* tree-loop-distribution.c (stmt_has_scalar_dependences_outside_loop):
	Handle PHIs.
	(classify_partition): Likewise.
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Patch

Index: gcc/tree-loop-distribution.c
===================================================================
--- gcc/tree-loop-distribution.c	(revision 188104)
+++ gcc/tree-loop-distribution.c	(working copy)
@@ -129,6 +129,9 @@  stmt_has_scalar_dependences_outside_loop
   def_operand_p def_p;
   ssa_op_iter op_iter;
 
+  if (gimple_code (stmt) == GIMPLE_PHI)
+    return ssa_name_has_uses_outside_loop_p (gimple_phi_result (stmt), loop);
+
   FOR_EACH_SSA_DEF_OPERAND (def_p, stmt, op_iter, SSA_OP_DEF)
     if (ssa_name_has_uses_outside_loop_p (DEF_FROM_PTR (def_p), loop))
       return true;
@@ -813,8 +816,7 @@  classify_partition (loop_p loop, struct
       /* If the stmt has uses outside of the loop fail.
 	 ???  If the stmt is generated in another partition that
 	 is not created as builtin we can ignore this.  */
-      if (gimple_code (stmt) != GIMPLE_PHI
-	  && stmt_has_scalar_dependences_outside_loop (loop, stmt))
+      if (stmt_has_scalar_dependences_outside_loop (loop, stmt))
 	{
 	  if (dump_file && (dump_flags & TDF_DETAILS))
 	    fprintf (dump_file, "not generating builtin, partition has "