builtins.c (expand_builtin_memcmp): Adjust MEM_SIZE to reflect size of memory…

builtins.c (expand_builtin_memcmp): Adjust MEM_SIZE to reflect size of memory regions being compared. * builtins.c (expand_builtin_memcmp): Adjust MEM_SIZE to reflect size of memory regions being compared. From-SVN: r88142

builtins.c (expand_builtin_memcmp): Adjust MEM_SIZE to reflect size of memory…
builtins.c (expand_builtin_memcmp): Adjust MEM_SIZE to reflect size of memory regions being compared. * builtins.c (expand_builtin_memcmp): Adjust MEM_SIZE to reflect size of memory regions being compared. From-SVN: r88142
6cbaec9e · Ulrich Weigand · Ulrich Weigand · 931e6c29 · 6cbaec9e · 6cbaec9e
Commit 6cbaec9e authored Sep 26, 2004 by Ulrich Weigand Committed by Ulrich Weigand Sep 26, 2004
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gcc/ChangeLog
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gcc/builtins.c
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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
 2004-09-26  Ulrich Weigand  <uweigand@de.ibm.com>

+	* builtins.c (expand_builtin_memcmp): Adjust MEM_SIZE to
+	reflect size of memory regions being compared.
+
+2004-09-26  Ulrich Weigand  <uweigand@de.ibm.com>
+
 	* builtins.c (get_memory_rtx): Set mem attributes for non-ADDR_EXPR
 	expressions.  Always clear MEM_SIZE and alias set.


--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -3540,6 +3540,14 @@ expand_builtin_memcmp (tree exp ATTRIBUTE_UNUSED, tree arglist, rtx target,
    arg1_rtx = get_memory_rtx (arg1);
    arg2_rtx = get_memory_rtx (arg2);
    arg3_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0);
+
+    /* Set MEM_SIZE as appropriate.  */
+    if (GET_CODE (arg3_rtx) == CONST_INT)
+      {
+	set_mem_size (arg1_rtx, arg3_rtx);
+	set_mem_size (arg2_rtx, arg3_rtx);
+      }
+
 #ifdef HAVE_cmpmemsi
    if (HAVE_cmpmemsi)
      insn = gen_cmpmemsi (result, arg1_rtx, arg2_rtx, arg3_rtx,