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tcg: Link branches to the labels

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This allows us to easily find all branches that use a label.
Since 'refs' is only tested vs zero, remove it and test for
an empty list instead.  Drop the use of bitfields, which had
been used to pack refs into a single 32-bit word.

Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-03-03 13:47:27 -08:00
parent 533206f052
commit f85b1fc4a0
4 changed files with 53 additions and 25 deletions
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7
include/tcg/tcg-op.h
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@ -259,12 +259,7 @@ static inline void gen_set_label(TCGLabel *l)
tcg_gen_op1(INDEX_op_set_label, label_arg(l));
}
static inline void tcg_gen_br(TCGLabel *l)
{
l->refs++;
tcg_gen_op1(INDEX_op_br, label_arg(l));
}
void tcg_gen_br(TCGLabel *l);
void tcg_gen_mb(TCGBar);
/* Helper calls. */