* [RFC] [PATCH 2/4] remove dead branch usage
@ 2006-12-28 9:25 Christopher Li
0 siblings, 0 replies; only message in thread
From: Christopher Li @ 2006-12-28 9:25 UTC (permalink / raw)
To: linux-sparse; +Cc: Linus Torvalds, Josh Triplett, Dan Carpenter
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);
}
}
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2006-12-28 9:25 [RFC] [PATCH 2/4] remove dead branch usage Christopher Li
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