Add tree_fits_uhwi_p tests to BIT_FIELD_REF folder
The first BIT_FIELD_REF folding pattern assumed without checking that
operands satisfy tree_fits_uhwi_p. The second pattern does check this:
/* On constants we can use native encode/interpret to constant
fold (nearly) all BIT_FIELD_REFs. */
if (CONSTANT_CLASS_P (arg0)
&& can_native_interpret_type_p (type)
&& BITS_PER_UNIT == 8
&& tree_fits_uhwi_p (op1)
&& tree_fits_uhwi_p (op2))
so this patch adds the checks to the first pattern too. This is needed
for POLY_INT_CST bit positions.
2018-01-04 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
* fold-const.c (fold_ternary_loc): Check tree_fits_uhwi_p before
using tree_to_uhwi.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@256258
138bc75d-0d04-0410-961f-
82ee72b054a4