re PR tree-optimization/81741 (Misoptimisation : replacing a constant field read access by a function call)
PR tree-optimization/81741
PR tree-optimization/71947
* tree-ssa-dom.c: Include tree-inline.h.
(record_temporary_equivalences): Only record SSA_NAME = SSA_NAME
equivalences if one is more expensive to compute than the other.
* tree-ssa-scopedtables.h (class const_or_copies): Make
record_const_or_copy_raw method private.
(class avail_exprs_stack): New method simplify_binary_operation.
* tree-ssa-scopedtables.c (avail_exprs_stack::lookup_avail_expr): Call
avail_exprs_stack::simplify_binary_operation as needed.
(avail_exprs_stack::simplify_binary_operation): New function.
PR tree-optimization/81741
PR tree-optimization/71947
* gcc.dg/tree-ssa/pr81741.c: New test.
* gcc.dg/tree-ssa/pr71947-7.c: New test.
* gcc.dg/tree-ssa/pr71947-8.c: New test.
* gcc.dg/tree-ssa/pr71947-9.c: New test.
* gcc.dg/tree-ssa/pr71941-1.c: Tweak expected output.
* gcc.dg/tree-ssa/pr71941-2.c: Tweak expected output.
* gcc.dg/tree-ssa/pr71941-3.c: Tweak expected output.
* gcc.dg/tree-ssa/20030922-2.c: xfail.
From-SVN: r251279
