PR optimization/5999, middle-end/5731

PR optimization/5999, middle-end/5731
	* expr.c (expand_expr) [RDIV_EXPR]: Only convert real divisions into
	multiplications by reciprocals.

	* gcc.c-torture/compile/20020319-1.c: New test.

From-SVN: r51040

gcc/ChangeLog

@@ -1,3 +1,9 @@
+2002-03-19  Dale Johannesen  <dalej@apple.com>
+
+	PR optimization/5999, middle-end/5731
+	* expr.c (expand_expr) [RDIV_EXPR]: Only convert real divisions into
+	multiplications by reciprocals.
+
 2002-03-19  Bob Wilson  <bob.wilson@acm.org>
 
 	* config/xtensa/xtensa.md (adddi3, adddi_carry, subdi3,

gcc/expr.c

@@ -7741,6 +7741,7 @@ expand_expr (exp, target, tmode, modifier)
          expensive divide.  If not, combine will rebuild the original
          computation.  */
       if (flag_unsafe_math_optimizations && optimize && !optimize_size
+	  && TREE_CODE (type) == REAL_TYPE
 	  && !real_onep (TREE_OPERAND (exp, 0)))
         return expand_expr (build (MULT_EXPR, type, TREE_OPERAND (exp, 0),
 				   build (RDIV_EXPR, type,

gcc/testsuite/ChangeLog

@@ -4,6 +4,8 @@
 
 	* gcc.dg/struct-by-value-1.c: New test.
 
+	* gcc.c-torture/compile/20020319-1.c: New test.
+
 2002-03-18  Neil Booth  <neil@daikokuya.demon.co.uk>
 
 	* gcc.dg/cpp/wchar-1.c: Fix test.

gcc/testsuite/gcc.dg/20020319-1.c

@@ -0,0 +1,10 @@
+/* PR optimization/5999
+   This testcase ICEd because one a/b -> a * (1/b) optimization
+   did not handle complex divides.  */
+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math" } */
+
+__complex__ double foo (__complex__ double x, __complex__ double y)
+{
+  return x / y;
+}