diff mbox series

[46/48] tcg/optimize: Propagate sign info for setcond

Message ID 20210830062451.639572-47-richard.henderson@linaro.org
State New
Headers show
Series tcg: optimize redundant sign extensions | expand

Commit Message

Richard Henderson Aug. 30, 2021, 6:24 a.m. UTC 
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.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/optimize.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/tcg/optimize.c b/tcg/optimize.c
index cbb5700f44..788a5acf10 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1681,6 +1681,7 @@  static bool fold_setcond(OptContext *ctx, TCGOp *op)
     }
 
     ctx->z_mask = 1;
+    ctx->s_mask = smask_from_zmask(1);
     return false;
 }
 
@@ -1753,6 +1754,7 @@  static bool fold_setcond2(OptContext *ctx, TCGOp *op)
     }
 
     ctx->z_mask = 1;
+    ctx->s_mask = smask_from_zmask(1);
     return false;
 
  do_setcond_const: