convert.c (convert_to_integer): Convert (long)round -> lround, etc.

	* convert.c (convert_to_integer): Convert (long)round -> lround,
	etc.

testsuite:
	* gcc.dg/torture/builtin-convert-2.c: New test.

From-SVN: r81269

gcc/ChangeLog

+2004-04-28  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* convert.c (convert_to_integer): Convert (long)round -> lround,
+	etc.
+
 2004-04-28  Andrew Pinski  <pinskia@physics.uc.edu>
 
 	* config/rs6000/rs6000.c (registers_ok_for_quad_peep):

gcc/convert.c

@@ -332,6 +332,52 @@ convert_to_integer (tree type, tree expr)
       return error_mark_node;
     }
 
+  /* Convert e.g. (long)round(d) -> lround(d).  */
+  /* If we're converting to char, we may encounter differing behavior
+     between converting from double->char vs double->long->char.
+     We're in "undefined" territory but we prefer to be conservative,
+     so only proceed in "unsafe" math mode.  */
+  if (optimize
+      && (flag_unsafe_math_optimizations
+	  || outprec >= TYPE_PRECISION (long_integer_type_node)))
+    {
+      tree s_expr = strip_float_extensions (expr);
+      tree s_intype = TREE_TYPE (s_expr);
+      const enum built_in_function fcode = builtin_mathfn_code (s_expr);
+      tree fn = 0;
+      
+      switch (fcode)
+        {
+	case BUILT_IN_ROUND: case BUILT_IN_ROUNDF: case BUILT_IN_ROUNDL:
+	  if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (long_long_integer_type_node))
+	    fn = mathfn_built_in (s_intype, BUILT_IN_LLROUND);
+	  else
+	    fn = mathfn_built_in (s_intype, BUILT_IN_LROUND);
+	  break;
+
+	case BUILT_IN_RINT: case BUILT_IN_RINTF: case BUILT_IN_RINTL:
+	  /* Only convert rint* if we can ignore math exceptions.  */
+	  if (flag_trapping_math)
+	    break;
+	  /* ... Fall through ...  */
+	case BUILT_IN_NEARBYINT: case BUILT_IN_NEARBYINTF: case BUILT_IN_NEARBYINTL:
+	  if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (long_long_integer_type_node))
+            fn = mathfn_built_in (s_intype, BUILT_IN_LLRINT);
+	  else
+            fn = mathfn_built_in (s_intype, BUILT_IN_LRINT);
+	  break;
+	default:
+	  break;
+	}
+      
+      if (fn)
+        {
+	  tree arglist = TREE_OPERAND (s_expr, 1);
+	  tree newexpr = build_function_call_expr (fn, arglist);
+	  return convert_to_integer (type, newexpr);
+	}
+    }
+
   switch (TREE_CODE (intype))
     {
     case POINTER_TYPE:

gcc/testsuite/ChangeLog

+2004-04-28  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* gcc.dg/torture/builtin-convert-2.c: New test.
+
 2004-04-28  Andrew Pinski  <pinskia@physics.uc.edu>
 
 	* gcc.dg/rs6000-power2-1.c: New test.

gcc/testsuite/gcc.dg/torture/builtin-convert-2.c

+/* Copyright (C) 2004  Free Software Foundation.
+
+   Verify that built-in math function conversion into integer rounding
+   functions is correctly performed by the compiler.
+
+   Written by Kaveh ghazi, 2004-04-26.  */
+
+/* { dg-do link } */
+/* { dg-options "-ffast-math" } */
+
+#include "./builtins-config.h"
+
+#define PROTOTYPE(FN) extern double FN(double); \
+  extern float FN##f(float); \
+  extern long double FN##l(long double);
+#define PROTOTYPE_RET(FN, RET) extern RET FN(double); \
+  extern RET FN##f(float); \
+  extern RET FN##l(long double);
+
+/* Macro to do all FP type combinations.  The second half tests
+   narrowing the FP type.  */
+#define TEST_FP2FIXED(FN1, FN2) \
+  PROTOTYPE(FN1) \
+  PROTOTYPE_RET(FN2, long) \
+  PROTOTYPE_RET(l##FN2, long long) \
+  extern void link_error_##FN1##_##FN2(void); \
+  extern void link_error_##FN1##f_##FN2##f(void); \
+  extern void link_error_##FN1##l_##FN2##l(void); \
+  extern void link_error_##FN1##_l##FN2(void); \
+  extern void link_error_##FN1##f_l##FN2##f(void); \
+  extern void link_error_##FN1##l_l##FN2##l(void); \
+  if ((long)FN1(d) != FN2(d)) \
+    link_error_##FN1##_##FN2(); \
+  if ((long)FN1##f(f) != FN2##f(f)) \
+    link_error_##FN1##f_##FN2##f(); \
+  if ((long)FN1##l(ld) != FN2##l(ld)) \
+    link_error_##FN1##l_##FN2##l(); \
+  if ((long long)FN1(d) != l##FN2(d)) \
+    link_error_##FN1##_l##FN2(); \
+  if ((long long)FN1##f(f) != l##FN2##f(f)) \
+    link_error_##FN1##f_l##FN2##f(); \
+  if ((long long)FN1##l(ld) != l##FN2##l(ld)) \
+    link_error_##FN1##l_l##FN2##l(); \
+  extern void link_error_##FN1##_##FN2##f(void); \
+  extern void link_error_##FN1##l_##FN2(void); \
+  extern void link_error_##FN1##l_##FN2##f(void); \
+  extern void link_error_##FN1##_l##FN2##f(void); \
+  extern void link_error_##FN1##l_l##FN2(void); \
+  extern void link_error_##FN1##l_l##FN2##f(void); \
+  if (sizeof(double) > sizeof(float) && (long)FN1(f) != FN2##f(f)) \
+    link_error_##FN1##_##FN2##f(); \
+  if (sizeof(long double) > sizeof(double) && (long)FN1##l(d) != FN2(d)) \
+    link_error_##FN1##l_##FN2(); \
+  if (sizeof(long double) > sizeof(float) && (long)FN1##l(f) != FN2##f(f)) \
+    link_error_##FN1##l_##FN2##f(); \
+  if (sizeof(double) > sizeof(float) && (long long)FN1(f) != l##FN2##f(f)) \
+    link_error_##FN1##_l##FN2##f(); \
+  if (sizeof(long double) > sizeof(double) && (long long)FN1##l(d) != l##FN2(d)) \
+    link_error_##FN1##l_l##FN2(); \
+  if (sizeof(long double) > sizeof(float) && (long long)FN1##l(f) != l##FN2##f(f)) \
+    link_error_##FN1##l_l##FN2##f()
+
+void __attribute__ ((__noinline__)) foo (double d, float f, long double ld)
+{
+#ifdef __OPTIMIZE__
+# ifdef HAVE_C99_RUNTIME
+  /* The resulting transformation functions are all C99.  */
+  TEST_FP2FIXED (round, lround);
+  TEST_FP2FIXED (nearbyint, lrint);
+  TEST_FP2FIXED (rint, lrint);
+# endif
+#endif
+}
+
+int main()
+{
+  foo (1.0, 2.0, 3.0);
+  return 0;
+}