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[vta] set correct dep type for debug insns in modulo-sched
- From: Alexandre Oliva <aoliva at redhat dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Sun, 01 Mar 2009 03:11:38 -0300
- Subject: [vta] set correct dep type for debug insns in modulo-sched
We check that debug insns' dependencies are always anti-deps elsewhere,
but this piece of code didn't honor this property. Now it does.
Installing in the branch.
for gcc/ChangeLog.vta
from Alexandre Oliva <aoliva@redhat.com>
* ddg.c (add_cross_iteration_register_deps): Change dep type
for debug insns.
Index: gcc/ddg.c
===================================================================
--- gcc/ddg.c.orig 2008-12-10 02:40:09.000000000 -0200
+++ gcc/ddg.c 2008-12-15 02:26:17.000000000 -0200
@@ -283,7 +283,8 @@ add_cross_iteration_register_deps (ddg_p
/* Add true deps from last_def to it's uses in the next
iteration. Any such upwards exposed use appears before
the last_def def. */
- create_ddg_dep_no_link (g, last_def_node, use_node, TRUE_DEP,
+ create_ddg_dep_no_link (g, last_def_node, use_node,
+ DEBUG_INSN_P (use_insn) ? ANTI_DEP : TRUE_DEP,
REG_DEP, 1);
}
else if (!DEBUG_INSN_P (use_insn))
--
Alexandre Oliva http://www.lsd.ic.unicamp.br/~oliva/
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Be Free! -- http://FSFLA.org/ FSF Latin America board member
Free Software Evangelist Red Hat Brazil Compiler Engineer