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| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/tree-ssa-math-opts.c | 4 |
2 files changed, 9 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f88c404..d9d41ad 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2016-06-28 Wilco Dijkstra <wdijkstr@arm.com> + + * tree-ssa-math-opts.c (find_bswap_or_nop_1): Adjust bitnumbering + for big-endian BIT_FIELD_REF. + 2016-06-28 Pat Haugen <pthaugen@us.ibm.com> * config/rs6000/rs6000.md ('type' attribute): Add htmsimple/dfp types. diff --git a/gcc/tree-ssa-math-opts.c b/gcc/tree-ssa-math-opts.c index 513ef0b..d31c12f 100644 --- a/gcc/tree-ssa-math-opts.c +++ b/gcc/tree-ssa-math-opts.c @@ -2307,6 +2307,10 @@ find_bswap_or_nop_1 (gimple *stmt, struct symbolic_number *n, int limit) && bitsize % BITS_PER_UNIT == 0 && init_symbolic_number (n, TREE_OPERAND (rhs1, 0))) { + /* Handle big-endian bit numbering in BIT_FIELD_REF. */ + if (BYTES_BIG_ENDIAN) + bitpos = TYPE_PRECISION (n->type) - bitpos - bitsize; + /* Shift. */ if (!do_shift_rotate (RSHIFT_EXPR, n, bitpos)) return NULL; |