[PATCH v4 49/51] tcg/optimize: Propagate sign info for setcond

[Richard Henderson]

The result is either 0 or 1, which means that we have
a 2 bit signed result, and thus 62 bits of sign.
For clarity, use the smask_from_zmask function.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/optimize.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 311d9779f2..515087876c 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1729,6 +1729,7 @@ static bool fold_setcond(OptContext *ctx, TCGOp *op)
     }
 
     ctx->z_mask = 1;
+    ctx->s_mask = smask_from_zmask(1);
     return false;
 }
 
@@ -1801,6 +1802,7 @@ static bool fold_setcond2(OptContext *ctx, TCGOp *op)
     }
 
     ctx->z_mask = 1;
+    ctx->s_mask = smask_from_zmask(1);
     return false;
 
  do_setcond_const:
-- 
2.25.1