if the count exceeds the width of the value inside the subreg.
(note_mem_written): (mem (scratch)) means clobber everything.
(fold_rtx): Special case handling for folding
a subreg of the result of a left shift.
From-SVN: r5854
* cse.c: (FIXED_REGNO_P): HARD_FRAME_POINTER_REGNUM is fixed.
(CHEAP_REG): HARD_FRAME_POINTER_REGNUM is cheap.
(FIXED_BASE_PLUS): Allow hard frame pointer as base.
(NONZERO_BASE_PLUS_P): Likewise.
(cannon_hash, case REG): Add HARD_FRAME_POINTER_REGNUM to list of
special registers for SMALL_REGISTER_CLASSES.
(find_best_addr): Addresses containing HARD_FRAME_POINTER_REGNUM
cannot be replaced.
(cse_main): value in HARD_FRAME_POINTER_REGNUM is preserved across calls.
From-SVN: r5451
(cse_insn): After inserting src_eqv, check to see if it is
identical to any uninserted SET_SRCs, and if so, set their src_elt
to src_eqv_elt.
From-SVN: r5129
(fold_rtx): Correct check for associating shifts and
ending up with a shift count too large; convert to the
largest valid for ASHIFTRT and don't fold all others.
From-SVN: r4585
(simplify_binary_operation, case MULT): When testing for
floating-point equality, make sure we do so inside a region protected
from traps.
From-SVN: r3963
(simplify_binary_operation): real_value_truncate
returns REAL_VALUE_TYPE.
Convert rtx_code into tree_code for argument to REAL_ARITHMETIC.
(simplify_unary_operation): Use new ..._RNDZINT macros
instead of casting value of REAL_VALUE_FIX_TRUNCATE
and REAL_VALUE_UNSIGNED_FIX_TRUNCATE.
From-SVN: r3943
(simplify_plus_minus): Count CONSTs coming in and going out; we have
simplified things if we have more CONSTs going out even if we have the
same number of total terms.
From-SVN: r3787
* cse.c (set_nonvarying_address_components): New function.
(invalidate): Use set_nonvarying_address_components instead of
computing them.
(refers_to_mem_p): Likewise. Simplify checks for conflicting
memory accesses. Make static.
From-SVN: r3703
(find_best_addr): Use cse_gen_binary.
(simplify_binary_operation, fold_rtx): Likewise.
Remove most special-cases for PLUS and MINUS and call
simplify_plus_minus instead.
Clean up some tests for FP.
From-SVN: r3680
(struct cse_basic_block_data): Move to front of file since it constains
struct used in a prototype.
(refers_to_p, find_best_addr): Now static.
From-SVN: r3675
(simplify_binary_operation): Move integer CONST_DOUBLE folding out of
REAL_IS_NOT_DOUBLE conditional.
(simplify_relational_operation): Put float CONST_DOUBLE folding under a
REAL_IS_NOT_DOUBLE conditional.
Add folding for integer CONST_DOUBLE comparisons.
From-SVN: r3661
(simplify_relation_operation): We can compute the result of a
comparison of CONST_INTs no matter what mode the computation is to be
done in.
From-SVN: r3372
