Add a routine to which masks can be passed directly, rather than
storing them into OptContext. To be used in upcoming patches.
Reviewed-by: Pierrick Bouvier <pierrick.bouv...@linaro.org>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
tcg/optimize.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 2aa57afd64..d70127b88d 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1044,10 +1044,14 @@ static bool fold_const2_commutative(OptContext *ctx,
TCGOp *op)
return fold_const2(ctx, op);
}
-static bool fold_masks(OptContext *ctx, TCGOp *op)
+/*
+ * Record "zero" and "sign" masks for the single output of @op.
+ * See TempOptInfo definition of z_mask and s_mask.
+ * If z_mask allows, fold the output to constant zero.
+ */
+static bool fold_masks_zs(OptContext *ctx, TCGOp *op,
+ uint64_t z_mask, uint64_t s_mask)
{
- uint64_t z_mask = ctx->z_mask;
- uint64_t s_mask = ctx->s_mask;
const TCGOpDef *def = &tcg_op_defs[op->opc];
TCGTemp *ts;
TempOptInfo *ti;
@@ -1080,6 +1084,11 @@ static bool fold_masks(OptContext *ctx, TCGOp *op)
return true;
}
+static bool fold_masks(OptContext *ctx, TCGOp *op)
+{
+ return fold_masks_zs(ctx, op, ctx->z_mask, ctx->s_mask);
+}
+
/*
* An "affected" mask bit is 0 if and only if the result is identical
* to the first input. Thus if the entire mask is 0, the operation
--
2.43.0
