2010-11-15 Richard Guenther <rguenther@suse.de>

	PR bootstrap/46474
	* tree-ssa-math-opts.c (convert_mult_to_fma): Disregard debug stmts.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@166750 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 8 insertions, 1 deletions

diff --git a/gcc/tree-ssa-math-opts.c b/gcc/tree-ssa-math-opts.c
index a2dfac6bb48..7837161e440 100644
--- a/gcc/tree-ssa-math-opts.c
+++ b/gcc/tree-ssa-math-opts.c
@@ -1534,6 +1534,9 @@ convert_mult_to_fma (gimple mul_stmt)
 
       use_stmt = USE_STMT (use_p);
 
+      if (is_gimple_debug (use_stmt))
+	continue;
+
       /* For now restrict this operations to single basic blocks.  In theory
 	 we would want to support sinking the multiplication in
 	 m = a*b;
@@ -1603,10 +1606,14 @@ convert_mult_to_fma (gimple mul_stmt)
   FOR_EACH_IMM_USE_STMT (use_stmt, imm_iter, mul_result)
     {
       gimple_stmt_iterator gsi = gsi_for_stmt (use_stmt);
-      enum tree_code use_code = gimple_assign_rhs_code (use_stmt);
+      enum tree_code use_code;
       tree addop, mulop1, result = mul_result;
       bool negate_p = false;
 
+      if (is_gimple_debug (use_stmt))
+	continue;
+
+      use_code = gimple_assign_rhs_code (use_stmt);
       if (use_code == NEGATE_EXPR)
 	{
 	  result = gimple_assign_lhs (use_stmt);