lto-wrapper.c (merge_and_complain): Ensure -fshort-double is used consistently accross all TUs.

2014-03-08  Paulo Matos  <paulo@matos-sorge.com>
	    Richard Biener  <rguenther@suse.de>

	* lto-wrapper.c (merge_and_complain): Ensure -fshort-double is used
	consistently accross all TUs.
	(run_gcc): Enable -fshort-double automatically at link at link-time
	and disallow override.

2014-03-08  Paulo Matos  <paulo@matos-sorge.com>

    * c.opt: Enable LTO FE for fshort-double.

2014-03-08  Paulo Matos  <paulo@matos-sorge.com>

    * gcc.dg/lto/pr55113_0.c: New testcase.

2014-03-08  Paulo Matos  <paulo@matos-sorge.com>

    * lto-lang.c (lto_init): Pass flag_short_double to
    build_common_tree_nodes.


Co-Authored-By: Richard Biener <rguenther@suse.de>

From-SVN: r208428

gcc/ChangeLog

+2014-03-08  Paulo Matos  <paulo@matos-sorge.com>
+	    Richard Biener  <rguenther@suse.de>
+
+	* lto-wrapper.c (merge_and_complain): Ensure -fshort-double is used
+	consistently accross all TUs.
+	(run_gcc): Enable -fshort-double automatically at link at link-time
+	and disallow override.
+
 2014-03-08  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	PR target/58271

gcc/c-family/ChangeLog

+2014-03-08  Paulo Matos  <paulo@matos-sorge.com>
+
+    * c.opt: Enable LTO FE for fshort-double.
+
 2014-03-07  Jason Merrill  <jason@redhat.com>
 
 	* c.opt: Add -std=c++14.

gcc/c-family/c.opt

@@ -1141,7 +1141,7 @@ C++ ObjC++ Optimization Var(flag_rtti) Init(1)
 Generate run time type descriptor information
 
 fshort-double
-C ObjC C++ ObjC++ Optimization Var(flag_short_double)
+C ObjC C++ ObjC++ LTO Optimization Var(flag_short_double)
 Use the same size for double as for float
 
 fshort-enums

gcc/lto-wrapper.c

@@ -452,6 +452,7 @@ merge_and_complain (struct cl_decoded_option **decoded_options,
 
 	case OPT_freg_struct_return:
 	case OPT_fpcc_struct_return:
+	case OPT_fshort_double:
 	  for (j = 0; j < *decoded_options_count; ++j)
 	    if ((*decoded_options)[j].opt_index == foption->opt_index)
 	      break;
@@ -677,6 +678,7 @@ run_gcc (unsigned argc, char *argv[])
 	case OPT_fgnu_tm:
 	case OPT_freg_struct_return:
 	case OPT_fpcc_struct_return:
+	case OPT_fshort_double:
 	case OPT_ffp_contract_:
 	case OPT_fwrapv:
 	case OPT_ftrapv:
@@ -748,6 +750,7 @@ run_gcc (unsigned argc, char *argv[])
 
 	case OPT_freg_struct_return:
 	case OPT_fpcc_struct_return:
+	case OPT_fshort_double:
 	  /* Ignore these, they are determined by the input files.
 	     ???  We fail to diagnose a possible mismatch here.  */
 	  continue;

gcc/lto/ChangeLog

+2014-03-08  Paulo Matos  <paulo@matos-sorge.com>
+
+    * lto-lang.c (lto_init): Pass flag_short_double to
+    build_common_tree_nodes.
+
 2014-02-14  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR lto/60295

gcc/lto/lto-lang.c

@@ -1158,7 +1158,7 @@ lto_init (void)
   flag_generate_lto = (flag_wpa != NULL);
 
   /* Create the basic integer types.  */
-  build_common_tree_nodes (flag_signed_char, /*short_double=*/false);
+  build_common_tree_nodes (flag_signed_char, flag_short_double);
 
   /* The global tree for the main identifier is filled in by
      language-specific front-end initialization that is not run in the

gcc/testsuite/ChangeLog

+2014-03-08  Paulo Matos  <paulo@matos-sorge.com>
+
+    * gcc.dg/lto/pr55113_0.c: New testcase.
+
 2014-03-08  Adam Butcher  <adam@jessamine.co.uk>
 
 	PR c++/60033

gcc/testsuite/gcc.dg/lto/pr55113_0.c

+/* PR 55113 */
+/* { dg-lto-do link } */
+/* { dg-lto-options { { -flto -fshort-double -O0 } } }*/
+/* { dg-skip-if "PR60410" { { x86_64-*-* i?86-*-* } && lp64 } } */
+
+int 
+main(void)
+{
+  float a = 1.0;
+  float b = 2.0;
+  double f = a + b * 1e-12;
+  return (int)f - 1;
+}