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[Bug middle-end/31531] A microoptimization of isnegative of signed integer
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Apr 2007 18:20:11 -0000
- Subject: [Bug middle-end/31531] A microoptimization of isnegative of signed integer
- References: <bug-31531-14390@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from pinskia at gcc dot gnu dot org 2007-04-10 19:20 -------
A quick patch like:
Index: expr.c
===================================================================
--- expr.c (revision 123691)
+++ expr.c (working copy)
@@ -6828,7 +6828,7 @@
tree type;
int unsignedp;
enum machine_mode mode;
- enum tree_code code = TREE_CODE (exp);
+ enum tree_code code;
optab this_optab;
rtx subtarget, original_target;
int ignore;
@@ -6840,6 +6840,9 @@
type) \
: (expr))
+ if (TREE_CODE (exp) != COND_EXPR && !GIMPLE_TUPLE_P (exp))
+ exp = fold (exp);
+ code = TREE_CODE(exp);
if (GIMPLE_STMT_P (exp))
{
type = void_type_node;
Makes all functions emit the same code.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31531