commit 2b9d0c59edec097c72ce9b917d3c08dc5d59cdda
author Richard Henderson <richard.henderson@linaro.org> Thu Aug 26 13:24:17 2021 -0700
committer Richard Henderson <richard.henderson@linaro.org> Thu Oct 28 20:55:07 2021 -0700
tree 62721df48e0dac5a71fd1d4b2c565c42d6e0072c
parent 275d7d8e70ef8679e241ce78c83548067f403394

tcg/optimize: Propagate sign info for bit counting

The results are generally 6 bit unsigned values, though
the count leading and trailing bits may produce any value
for a zero input.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

tcg/optimize.c

diff --git a/tcg/optimize.c b/tcg/optimize.c
index 5fa4d72..c0eccc6 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -1229,7 +1229,7 @@
         g_assert_not_reached();
     }
     ctx->z_mask = arg_info(op->args[2])->z_mask | z_mask;
-
+    ctx->s_mask = smask_from_zmask(ctx->z_mask);
     return false;
 }
 
@@ -1249,6 +1249,7 @@
     default:
         g_assert_not_reached();
     }
+    ctx->s_mask = smask_from_zmask(ctx->z_mask);
     return false;
 }