https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65628
Bug ID: 65628
Summary: valgrind error in improve_allocation
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Created attachment 35182
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35182&action=edit
C source code
The attached code, when compiled by gcc trunk dated 20150329
under valgrind, and flags -O, does this
==14429== Conditional jump or move depends on uninitialised value(s)
==14429== at 0xA0579C: improve_allocation() (ira-color.c:2774)
==14429== by 0xA0CA83: color_allocnos (ira-color.c:3098)
==14429== by 0xA0CA83: color_pass(ira_loop_tree_node*) (ira-color.c:3207)
==14429== by 0x9F1200: ira_traverse_loop_tree(bool, ira_loop_tree_node*,
void (*)(ira_loop_tree_node*), void (*)(ira_loop_tree_node*)) (i
ra-build.c:1820)
ira-color.c:2774 is
if ((hregno = ALLOCNO_HARD_REGNO (a)) < 0)
