re PR lto/51280 (ICE when lto1 does not have -fgnu-tm and object file uses TM)

        PR lto/51280
        * lto-wrapper.c (run_gcc): Pass -fgnu_tm on.
        (merge_and_complain): Same.

From-SVN: r183303

gcc/ChangeLog

+2012-01-19  Aldy Hernandez  <aldyh@redhat.com>
+
+	PR lto/51280
+	* lto-wrapper.c (run_gcc): Pass -fgnu_tm on.
+	(merge_and_complain): Same.
+
 2012-01-19  Jakub Jelinek  <jakub@redhat.com>
 
 	PR bootstrap/50237

gcc/lto-wrapper.c

@@ -403,6 +403,7 @@ merge_and_complain (struct cl_decoded_option **decoded_options,
 	case OPT_fpie:
 	case OPT_fcommon:
 	case OPT_fexceptions:
+	case OPT_fgnu_tm:
 	  /* Do what the old LTO code did - collect exactly one option
 	     setting per OPT code, we pick the first we encounter.
 	     ???  This doesn't make too much sense, but when it doesn't
@@ -555,6 +556,7 @@ run_gcc (unsigned argc, char *argv[])
 	case OPT_fpie:
 	case OPT_fcommon:
 	case OPT_fexceptions:
+	case OPT_fgnu_tm:
 	  break;
 
 	default:

gcc/testsuite/gcc.dg/lto/trans-mem-3_0.c

+/* { dg-lto-options {{-flto}} } */
+/* { dg-lto-do link } */
+
+/* Test that we can build one object file with -fgnu-tm
+   (trans-mem-3_1.c), but do the final link of all objects without
+   -fgnu-tm.  */
+
+int i;

gcc/testsuite/gcc.dg/lto/trans-mem-3_1.c

+/* { dg-options "-fgnu-tm" } */
+
+extern int i;
+
+main()
+{
+  __transaction_atomic { i = 0; }
+}
+
+#define dummy(func)							\
+  __attribute__((noinline,noclone,used)) void func() { asm (""); }
+
+dummy(_ITM_beginTransaction)
+dummy(_ITM_commitTransaction)
+dummy(_ITM_WU4)
+dummy(_ITM_WU8)
+dummy(_ITM_registerTMCloneTable)
+dummy(_ITM_deregisterTMCloneTable)