From: Aldy Hernandez <aldyh@redhat.com>
Date: Tue, 25 Jul 2023 16:30:42 +0000 (-0400)
Subject: [range-ops] Handle bitmasks for unary operators.
X-Git-Tag: basepoints/gcc-15~7362
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5cac2394ef958945d80112b7d18673fce0c93872;p=thirdparty%2Fgcc.git

[range-ops] Handle bitmasks for unary operators.

It looks like we missed out on bitmasks for unary operators because we
were using bit_value_binop exclusively.  This patch hands off to
bit_value_unop when appropriate, thus allowing us to handle ABS and
BIT_NOT_EXPR, and others.  Follow-up patches will add the tweaks for the
range-ops entries themselves.

gcc/ChangeLog:

	* range-op.cc (update_known_bitmask): Handle unary operators.
---

diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index 6b5d4f2accd2..d959a3e93dce 100644
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -385,15 +385,29 @@ update_known_bitmask (irange &r, tree_code code,
   irange_bitmask lh_bits = lh.get_bitmask ();
   irange_bitmask rh_bits = rh.get_bitmask ();
 
-  bit_value_binop (code, sign, prec, &widest_value, &widest_mask,
-		   TYPE_SIGN (lh.type ()),
-		   TYPE_PRECISION (lh.type ()),
-		   widest_int::from (lh_bits.value (), sign),
-		   widest_int::from (lh_bits.mask (), sign),
-		   TYPE_SIGN (rh.type ()),
-		   TYPE_PRECISION (rh.type ()),
-		   widest_int::from (rh_bits.value (), sign),
-		   widest_int::from (rh_bits.mask (), sign));
+  switch (get_gimple_rhs_class (code))
+    {
+    case GIMPLE_UNARY_RHS:
+      bit_value_unop (code, sign, prec, &widest_value, &widest_mask,
+		      TYPE_SIGN (lh.type ()),
+		      TYPE_PRECISION (lh.type ()),
+		      widest_int::from (lh_bits.value (), sign),
+		      widest_int::from (lh_bits.mask (), sign));
+      break;
+    case GIMPLE_BINARY_RHS:
+      bit_value_binop (code, sign, prec, &widest_value, &widest_mask,
+		       TYPE_SIGN (lh.type ()),
+		       TYPE_PRECISION (lh.type ()),
+		       widest_int::from (lh_bits.value (), sign),
+		       widest_int::from (lh_bits.mask (), sign),
+		       TYPE_SIGN (rh.type ()),
+		       TYPE_PRECISION (rh.type ()),
+		       widest_int::from (rh_bits.value (), sign),
+		       widest_int::from (rh_bits.mask (), sign));
+      break;
+    default:
+      gcc_unreachable ();
+    }
 
   wide_int mask = wide_int::from (widest_mask, prec, sign);
   wide_int value = wide_int::from (widest_value, prec, sign);