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| author | Aldy Hernandez <aldyh@redhat.com> | 2023-07-16 20:48:29 +0200 |
|---|---|---|
| committer | Aldy Hernandez <aldyh@redhat.com> | 2023-07-17 13:56:25 +0200 |
| commit | fb9ba7047740e29c15dc5c75bcec784b4a917abf (patch) | |
| tree | 3479af19c2fb0dd63913219193fbcc5f97dfa96d /gcc | |
| parent | 70742d08832eb7db4d90f52465966111a19ce3a5 (diff) | |
| download | gcc-fb9ba7047740e29c15dc5c75bcec784b4a917abf.zip gcc-fb9ba7047740e29c15dc5c75bcec784b4a917abf.tar.gz gcc-fb9ba7047740e29c15dc5c75bcec784b4a917abf.tar.bz2 | |
Export value/mask known bits from CCP.
Currently CCP throws away the known 1 bits because VRP and irange have
traditionally only had a way of tracking known 0s (set_nonzero_bits).
With the ability to keep all the known bits in the irange, we can now
save this between passes.
gcc/ChangeLog:
* tree-ssa-ccp.cc (ccp_finalize): Export value/mask known bits.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/tree-ssa-ccp.cc | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/gcc/tree-ssa-ccp.cc b/gcc/tree-ssa-ccp.cc index 0d0f02a..64d5fa8 100644 --- a/gcc/tree-ssa-ccp.cc +++ b/gcc/tree-ssa-ccp.cc @@ -1020,11 +1020,9 @@ ccp_finalize (bool nonzero_p) else { unsigned int precision = TYPE_PRECISION (TREE_TYPE (val->value)); - wide_int nonzero_bits - = (wide_int::from (val->mask, precision, UNSIGNED) - | wi::to_wide (val->value)); - nonzero_bits &= get_nonzero_bits (name); - set_nonzero_bits (name, nonzero_bits); + wide_int value = wi::to_wide (val->value); + wide_int mask = wide_int::from (val->mask, precision, UNSIGNED); + set_bitmask (name, value, mask); } } |