The following two patches should address all issues regarding to
alias analysis, restrict and ICF.
Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.
Richard.
2015-03-04 Richard Biener <rguent...@suse.de>
PR ipa/65270
* ipa-icf-gimple.c (func_checker::compare_memory_operand):
Compare dependence info.
Index: gcc/ipa-icf-gimple.c
===================================================================
--- gcc/ipa-icf-gimple.c (revision 221174)
+++ gcc/ipa-icf-gimple.c (working copy)
@@ -305,6 +305,23 @@ func_checker::compare_memory_operand (tr
get_object_alignment_1 (b2, &align2, &tem);
if (align1 != align2)
return return_false_with_msg ("different access alignment");
+
+ /* Similarly we have to compare dependence info where equality
+ tells us we are safe (even some unequal values would be safe
+ but then we have to maintain a map of bases and cliques). */
+ unsigned short clique1 = 0, base1 = 0, clique2 = 0, base2 = 0;
+ if (TREE_CODE (b1) == MEM_REF)
+ {
+ clique1 = MR_DEPENDENCE_CLIQUE (b1);
+ base1 = MR_DEPENDENCE_BASE (b1);
+ }
+ if (TREE_CODE (b2) == MEM_REF)
+ {
+ clique2 = MR_DEPENDENCE_CLIQUE (b2);
+ base2 = MR_DEPENDENCE_BASE (b2);
+ }
+ if (clique1 != clique2 || base1 != base2)
+ return return_false_with_msg ("different dependence info");
}
return compare_operand (t1, t2);
2015-03-04 Richard Biener <rguent...@suse.de>
PR ipa/65270
* ipa-icf.c (sem_function::equals_wpa): Make sure to
have compatible restrict qualifications on function parameters.
Index: gcc/ipa-icf.c
===================================================================
--- gcc/ipa-icf.c (revision 221174)
+++ gcc/ipa-icf.c (working copy)
@@ -405,7 +405,10 @@ sem_function::equals_wpa (sem_item *item
if (!func_checker::compatible_types_p (arg_types[i],
m_compared_func->arg_types[i],
- is_not_leaf, i == 0))
+ is_not_leaf, i == 0)
+ || (POINTER_TYPE_P (arg_types[i])
+ && (TYPE_RESTRICT (arg_types[i])
+ != TYPE_RESTRICT (m_compared_func->arg_types[i]))))
return return_false_with_msg ("argument type is different");
}
