Be more careful about insn->bb pointers.

Make sure to clear them when turning operations into NOP's. And when
doing OP_LOAD->OP_PHI conversion, just re-use the target pseudo,
which means that we don't need to unnecessarily move all the uses
over.

1 files changed, 1 insertions, 0 deletions

diff --git a/cse.c b/cse.c
index 7aa7fa2..b55c602 100644
--- a/cse.c
+++ b/cse.c
@@ -226,6 +226,7 @@ static struct instruction * cse_one_instruction(struct instruction *insn, struct
 {
 	convert_instruction_target(insn, def->target);
 	insn->opcode = OP_NOP;
+	insn->bb = NULL;
 	repeat_phase |= REPEAT_CSE;
 	return def;
 }