* optabs.c (prepare_cmp_insn): Let emit_library_call_value

	generate a pseudo reg that receives the result of a libcall.
	(prepare_float_lib_cmp): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@57255 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 17 insertions, 30 deletions

diff --git a/gcc/optabs.c b/gcc/optabs.c
index 7ceec122ff1..0d13bb144f1 100644
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -3436,29 +3436,23 @@ prepare_cmp_insn (px, py, pcomparison, size, pmode, punsignedp, purpose)
 #endif
 	{
 #ifdef TARGET_MEM_FUNCTIONS
-	  emit_library_call (memcmp_libfunc, LCT_PURE_MAKE_BLOCK,
-			     TYPE_MODE (integer_type_node), 3,
-			     XEXP (x, 0), Pmode, XEXP (y, 0), Pmode,
-			     convert_to_mode (TYPE_MODE (sizetype), size,
-					      TREE_UNSIGNED (sizetype)),
-			     TYPE_MODE (sizetype));
+	  result = emit_library_call_value (memcmp_libfunc, NULL_RTX, LCT_PURE_MAKE_BLOCK,
+					    TYPE_MODE (integer_type_node), 3,
+					    XEXP (x, 0), Pmode, XEXP (y, 0), Pmode,
+					    convert_to_mode (TYPE_MODE (sizetype), size,
+							     TREE_UNSIGNED (sizetype)),
+					    TYPE_MODE (sizetype));
 #else
-	  emit_library_call (bcmp_libfunc, LCT_PURE_MAKE_BLOCK,
-			     TYPE_MODE (integer_type_node), 3,
-			     XEXP (x, 0), Pmode, XEXP (y, 0), Pmode,
-			     convert_to_mode (TYPE_MODE (integer_type_node),
-					      size,
-					      TREE_UNSIGNED (integer_type_node)),
-			     TYPE_MODE (integer_type_node));
+	  result = emit_library_call_value (bcmp_libfunc, NULL_RTX, LCT_PURE_MAKE_BLOCK,
+					    TYPE_MODE (integer_type_node), 3,
+					    XEXP (x, 0), Pmode, XEXP (y, 0), Pmode,
+					    convert_to_mode (TYPE_MODE (integer_type_node),
+							     size,
+							     TREE_UNSIGNED (integer_type_node)),
+					    TYPE_MODE (integer_type_node));
 #endif
 
-	  /* Immediately move the result of the libcall into a pseudo
-	     register so reload doesn't clobber the value if it needs
-	     the return register for a spill reg.  */
-	  result = gen_reg_rtx (TYPE_MODE (integer_type_node));
 	  result_mode = TYPE_MODE (integer_type_node);
-	  emit_move_insn (result,
-			  hard_libcall_value (result_mode));
 	}
       *px = result;
       *py = const0_rtx;
@@ -3483,14 +3477,8 @@ prepare_cmp_insn (px, py, pcomparison, size, pmode, punsignedp, purpose)
       if (unsignedp && ucmp_optab->handlers[(int) mode].libfunc)
 	libfunc = ucmp_optab->handlers[(int) mode].libfunc;
 
-      emit_library_call (libfunc, LCT_CONST_MAKE_BLOCK, word_mode, 2, x, mode,
-			 y, mode);
-
-      /* Immediately move the result of the libcall into a pseudo
-	 register so reload doesn't clobber the value if it needs
-	 the return register for a spill reg.  */
-      result = gen_reg_rtx (word_mode);
-      emit_move_insn (result, hard_libcall_value (word_mode));
+      result = emit_library_call_value (libfunc, NULL_RTX, LCT_CONST_MAKE_BLOCK,
+					word_mode, 2, x, mode, y, mode);
 
       /* Integer comparison returns a result that must be compared against 1,
 	 so that even if we do an unsigned compare afterward,
@@ -4006,9 +3994,8 @@ prepare_float_lib_cmp (px, py, pcomparison, pmode, punsignedp)
   if (libfunc == 0)
     abort ();
 
-  result = gen_reg_rtx (word_mode);
-  emit_library_call_value (libfunc, result, LCT_CONST_MAKE_BLOCK,
-			   word_mode, 2, x, mode, y, mode);
+  result = emit_library_call_value (libfunc, NULL_RTX, LCT_CONST_MAKE_BLOCK,
+				    word_mode, 2, x, mode, y, mode);
   *px = result;
   *py = const0_rtx;
   *pmode = word_mode;