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var-tracking (and other modules) have a habit of assigning values to
objects, then never using the values. We still need the RHS side effect
in these cases, so the assignment was deleted leaving just the RHS as a
statement.
Fixed thusly for var-tracking.c. Bootstrapped and regression tested on
x86_64-unknown-linux-gnu. OK for trunk?
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* var-tracking.c (canonicalize_values_mark): Delete unused
lhs assignment.
(canonicalize_values_star, set_variable_part): Likewise.
(clobber_variable_part, delete_variable_part): Likewise.
Index: var-tracking.c
===================================================================
*** var-tracking.c (revision 171351)
--- var-tracking.c (working copy)
*************** canonicalize_values_mark (void **slot, v
*** 3117,3124 ****
decl_or_value odv = dv_from_value (node->loc);
void **oslot = shared_hash_find_slot_noinsert (set->vars, odv);
! oslot = set_slot_part (set, val, oslot, odv, 0,
! node->init, NULL_RTX);
VALUE_RECURSED_INTO (node->loc) = true;
}
--- 3117,3124 ----
decl_or_value odv = dv_from_value (node->loc);
void **oslot = shared_hash_find_slot_noinsert (set->vars, odv);
! set_slot_part (set, val, oslot, odv, 0,
! node->init, NULL_RTX);
VALUE_RECURSED_INTO (node->loc) = true;
}
*************** canonicalize_values_star (void **slot, v
*** 3329,3336 ****
}
if (val)
! cslot = set_slot_part (set, val, cslot, cdv, 0,
! VAR_INIT_STATUS_INITIALIZED, NULL_RTX);
slot = clobber_slot_part (set, cval, slot, 0, NULL);
--- 3329,3336 ----
}
if (val)
! set_slot_part (set, val, cslot, cdv, 0,
! VAR_INIT_STATUS_INITIALIZED, NULL_RTX);
slot = clobber_slot_part (set, cval, slot, 0, NULL);
*************** canonicalize_vars_star (void **slot, voi
*** 3401,3407 ****
slot = set_slot_part (set, cval, slot, dv, 0,
node->init, node->set_src);
! slot = clobber_slot_part (set, cval, slot, 0, node->set_src);
return 1;
}
--- 3401,3407 ----
slot = set_slot_part (set, cval, slot, dv, 0,
node->init, node->set_src);
! clobber_slot_part (set, cval, slot, 0, node->set_src);
return 1;
}
*************** set_variable_part (dataflow_set *set, rt
*** 7038,7044 ****
if (!slot)
slot = shared_hash_find_slot_unshare (&set->vars, dv, iopt);
}
! slot = set_slot_part (set, loc, slot, dv, offset, initialized, set_src);
}
/* Remove all recorded register locations for the given variable part
--- 7038,7044 ----
if (!slot)
slot = shared_hash_find_slot_unshare (&set->vars, dv, iopt);
}
! set_slot_part (set, loc, slot, dv, offset, initialized, set_src);
}
/* Remove all recorded register locations for the given variable part
*************** clobber_variable_part (dataflow_set *set
*** 7119,7125 ****
if (!slot)
return;
! slot = clobber_slot_part (set, loc, slot, offset, set_src);
}
/* Delete the part of variable's location from dataflow set SET. The
--- 7119,7125 ----
if (!slot)
return;
! clobber_slot_part (set, loc, slot, offset, set_src);
}
/* Delete the part of variable's location from dataflow set SET. The
*************** delete_variable_part (dataflow_set *set,
*** 7218,7224 ****
if (!slot)
return;
! slot = delete_slot_part (set, loc, slot, offset);
}
/* Structure for passing some other parameters to function
--- 7218,7224 ----
if (!slot)
return;
! delete_slot_part (set, loc, slot, offset);
}
/* Structure for passing some other parameters to function
