i386.c (option_override_internal): Enable TARGET_CMOVE when TARGET_RDRND is active.

	* 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.

From-SVN: r173921

gcc/ChangeLog

+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.
+
 2011-05-19  Joseph Myers  <joseph@codesourcery.com>
 
 	* config/arm/arm-fpus.def: New.
@@ -59,8 +66,7 @@
 	Remove ATTRIBUTE_UNUSED.
 	[!USE_GAS]: Call solaris_elf_asm_comdat_section for
 	SECTION_LINKONCE sections if HAVE_COMDAT_GROUP.
-	* config/sparc/sparc.c (sparc_solaris_elf_asm_named_section):
-	Likewise.
+	* config/sparc/sparc.c (sparc_solaris_elf_asm_named_section): Likewise.
 	* config/i386/sol2-10.h (TARGET_ASM_NAMED_SECTION): Moved ...
 	* config/i386/sol2.h (TARGET_ASM_NAMED_SECTION): ... here.
 	* config/sparc/sol2.h (TARGET_ASM_CODE_END): Redefine.

gcc/config/i386/i386.c

@@ -4091,8 +4091,9 @@ 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.  */
@@ -27613,6 +27614,12 @@ 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));
 
@@ -27627,17 +27634,13 @@ 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: