2011-05-19 Uros Bizjak <ubizjak@gmail.com>

	* config/i386/i386.c (option_override_internal): Enable TARGET_CMOVE
	when TARGET_RDRND is active.
	(ix86_expand_builtin) <case IX86_BUILTIN_RDRAND{16,32,64}_STEP>:
	Generate dummy SImode target register when target is NULL.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@173922 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 23ccd5f..3985f65 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2011-05-19  Uros Bizjak  <ubizjak@gmail.com>
+
+       * config/i386/i386.c (option_override_internal): Enable TARGET_CMOVE
+       when TARGET_RDRND is active.
+       (ix86_expand_builtin) <case IX86_BUILTIN_RDRAND{16,32,64}_STEP>:
+       Generate dummy SImode target register when target is NULL.
+
 2011-05-18  H.J. Lu  <hongjiu.lu@intel.com>
 
        Backport from mainline

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index e8b9af5..66800c4 100644 (file)
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -4164,8 +4164,9 @@ ix86_option_override_internal (bool main_args_p)
     }
 
   /* For sane SSE instruction set generation we need fcomi instruction.
-     It is safe to enable all CMOVE instructions.  */
-  if (TARGET_SSE)
+     It is safe to enable all CMOVE instructions.  Also, RDRAND intrinsic
+     expands to a sequence that includes conditional move. */
+  if (TARGET_SSE || TARGET_RDRND)
     TARGET_CMOVE = 1;
 
   /* Figure out what ASM_GENERATE_INTERNAL_LABEL builds as a prefix.  */
@@ -27450,6 +27451,12 @@ rdrand_step:
       op0 = gen_reg_rtx (mode0);
       emit_insn (GEN_FCN (icode) (op0));
 
+      arg0 = CALL_EXPR_ARG (exp, 0);
+      op1 = expand_normal (arg0);
+      if (!address_operand (op1, VOIDmode))
+       op1 = copy_addr_to_reg (op1);
+      emit_move_insn (gen_rtx_MEM (mode0, op1), op0);
+
       op1 = gen_reg_rtx (SImode);
       emit_move_insn (op1, CONST1_RTX (SImode));
 
@@ -27464,17 +27471,13 @@ rdrand_step:
       else
        op2 = gen_rtx_SUBREG (SImode, op0, 0);
 
+      if (target == 0)
+       target = gen_reg_rtx (SImode);
+
       pat = gen_rtx_GEU (VOIDmode, gen_rtx_REG (CCCmode, FLAGS_REG),
                         const0_rtx);
-      emit_insn (gen_rtx_SET (VOIDmode, op1,
+      emit_insn (gen_rtx_SET (VOIDmode, target,
                              gen_rtx_IF_THEN_ELSE (SImode, pat, op2, op1)));
-      emit_move_insn (target, op1);
-
-      arg0 = CALL_EXPR_ARG (exp, 0);
-      op1 = expand_normal (arg0);
-      if (!address_operand (op1, VOIDmode))
-       op1 = copy_addr_to_reg (op1);
-      emit_move_insn (gen_rtx_MEM (mode0, op1), op0);
       return target;
 
     default: