re PR tree-optimization/64950 (postpone expanding va_arg till pass_stdarg)

	PR tree-optimization/64950
	Revert:
	2010-08-02  Uros Bizjak  <ubizjak@gmail.com>

	PR target/41089
	* config/alpha/alpha.c (alpha_build_builtin_va_list): Mark __offset
	as volatile.

From-SVN: r222257

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 47089f366c4dc0d0f150934f5a73309c7e865199..10f4dafbabf610207c5f0449d27df94b8b373583 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2015-04-21  Uros Bizjak  <ubizjak@gmail.com>
+
+       PR tree-optimization/64950
+       Revert:
+       2010-08-02  Uros Bizjak  <ubizjak@gmail.com>
+
+       PR target/41089
+       * config/alpha/alpha.c (alpha_build_builtin_va_list): Mark __offset
+       as volatile.
+
 2015-04-20  Shiva Chen  <shiva0217@gmail.com>
 
        PR rtl-optimization/64916
@@ -15,7 +25,7 @@
        * tree-ssa-threadupdate.c (redirection_block_p): Remove
        redundant test for GIMPLE_ASSIGN in last change.
 
-2015-04-19  Uros Bizjak  <ubizjak@gmail.com>
+2015-04-20  Uros Bizjak  <ubizjak@gmail.com>
 
        * config/i386/i386.c (set_pic_reg_ever_live): Remove.
        (legitimize_pic_address): Do not call set_pic_reg_ever_live.

diff --git a/gcc/config/alpha/alpha.c b/gcc/config/alpha/alpha.c
index 67c15dc33686c51a0cfb88ae2655e0e259442a0b..6f797b3d688992aaab1ee833f4ea42da6b315100 100644 (file)
--- a/gcc/config/alpha/alpha.c
+++ b/gcc/config/alpha/alpha.c
@@ -5957,10 +5957,6 @@ alpha_build_builtin_va_list (void)
                    integer_type_node);
   DECL_FIELD_CONTEXT (ofs) = record;
   DECL_CHAIN (ofs) = space;
-  /* ??? This is a hack, __offset is marked volatile to prevent
-     DCE that confuses stdarg optimization and results in
-     gcc.c-torture/execute/stdarg-1.c failure.  See PR 41089.  */
-  TREE_THIS_VOLATILE (ofs) = 1;
 
   base = build_decl (BUILTINS_LOCATION,
                     FIELD_DECL, get_identifier ("__base"),