From: Christopher Li <sparse@chrisli.org>
To: linux-sparse@vger.kernel.org
Cc: Linus Torvalds <torvalds@osdl.org>,
Josh Triplett <josh@freedesktop.org>,
Dan Carpenter <error27@gmail.com>
Subject: [RFC] [PATCH 2/4] remove dead branch usage
Date: Thu, 28 Dec 2006 01:25:40 -0800 [thread overview]
Message-ID: <20061228092540.GC6573@chrisli.org> (raw)
Fix some problem cause by dead branch instruction left in the user chain.
Signed-off-by: Christopher Li <sparse@chrisli.org>
Index: sparse/flow.c
===================================================================
--- sparse.orig/flow.c 2006-12-21 14:35:18.000000000 -0800
+++ sparse/flow.c 2006-12-21 14:35:55.000000000 -0800
@@ -195,6 +195,7 @@ try_to_rewrite_target:
if (bb_list_size(target->parents) != 1)
return retval;
insert_branch(target, insn, final);
+ kill_instruction(insn);
return 1;
}
Index: sparse/simplify.c
===================================================================
--- sparse.orig/simplify.c 2006-12-21 14:35:18.000000000 -0800
+++ sparse/simplify.c 2006-12-21 14:35:55.000000000 -0800
@@ -217,6 +217,11 @@ void kill_instruction(struct instruction
kill_use(&insn->src2);
kill_use(&insn->src3);
return;
+ case OP_BR:
+ insn->bb = NULL;
+ repeat_phase |= REPEAT_CSE;
+ if (insn->cond)
+ kill_use(&insn->cond);
}
}
reply other threads:[~2006-12-28 9:43 UTC|newest]
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