http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57151
Bug #: 57151
Summary: Wasted work in method verify_cgraph_node
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: pcha...@cs.wisc.edu
Created attachment 30012
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30012
Suggested patch
The problem appears in version 4.8 and in revision 198496. I attached
a one-line patch that fixes it.
In method "verify_cgraph_node" in cgraph.c, the second loop over
"node->indirect_calls" should break immediately after "error_found" is
set to "true". All the iterations after "error_found" is set to
"true" do not perform any useful work, at best they just set
"error_found" again to "true".
Method "ix86_legitimate_combined_insn" in i386.c has a similar loop
over "recog_data.n_alternatives", and this loop breaks immediately
after "win" is set to "true", just like in the proposed patch. Other
methods (e.g., "tagged_types_tu_compatible_p" in c-typeck.c,
"rest_of_record_type_compilation" in utils.c, "distance_agu_use" in
i386.c) also have similar loops that break like in the proposed patch.
