http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54689
Bug #: 54689
Summary: sparseset.h:147 Conditional jump or move depends on
uninitialised value(s)
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: dim...@gmail.com
GNU C++ (GCC) version 4.8.0 20120923 (experimental) [trunk revision 191649]
(x86_64-unknown-linux-gnu)
$ cat undef_sparseset_h.ii
class A {
int f() const;
};
int A::f() const {}
$ LANG=C valgrind --track-origins=yes --num-callers=24
/usr/local/gcc_current/libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/cc1plus -v
-fpreprocessed undef_sparseset_h.ii -quiet -march=x86-64 -o iiii -version
==19291== Memcheck, a memory error detector
==19291== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al.
==19291== Using Valgrind-3.9.0.SVN and LibVEX; rerun with -h for copyright info
==19291== Command:
/usr/local/gcc_current/libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/cc1plus -v
-fpreprocessed undef_sparseset_h.ii -quiet -march=x86-64 -o iiii -version
==19291==
GNU C++ (GCC) version 4.8.0 20120923 (experimental) [trunk revision 191649]
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.8.0 20120923 (experimental) [trunk revision
191649], GMP version 5.0.2, MPFR version 3.1.0, MPC version 0.9
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
ignoring nonexistent directory
"/usr/local/gcc_current/lib/gcc/x86_64-unknown-linux-gnu/4.8.0/../../../../x86_64-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/gcc_current/lib/gcc/x86_64-unknown-linux-gnu/4.8.0/include/c++
/usr/local/gcc_current/lib/gcc/x86_64-unknown-linux-gnu/4.8.0/include/c++/x86_64-unknown-linux-gnu
/usr/local/gcc_current/lib/gcc/x86_64-unknown-linux-gnu/4.8.0/include/c++/backward
/usr/local/gcc_current/lib/gcc/x86_64-unknown-linux-gnu/4.8.0/include
/usr/local/include
/usr/local/gcc_current/include
/usr/local/gcc_current/lib/gcc/x86_64-unknown-linux-gnu/4.8.0/include-fixed
/usr/include
End of search list.
GNU C++ (GCC) version 4.8.0 20120923 (experimental) [trunk revision 191649]
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.8.0 20120923 (experimental) [trunk revision
191649], GMP version 5.0.2, MPFR version 3.1.0, MPC version 0.9
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: fc0afb1edaeae797a870fb2622727189
==19291== Conditional jump or move depends on uninitialised value(s)
==19291== at 0x92D0FD: mark_pseudo_regno_live(int) (sparseset.h:147)
==19291== by 0x92E11C: process_bb_node_lives(ira_loop_tree_node*)
(ira-lives.c:1326)
==19291== by 0x9161FA: ira_traverse_loop_tree(bool, ira_loop_tree_node*,
void (*)(ira_loop_tree_node*), void (*)(ira_loop_tree_node*))
(ira-build.c:1495)
==19291== by 0x92ECA1: ira_create_allocno_live_ranges() (ira-lives.c:1591)
==19291== by 0x9188C4: ira_build() (ira-build.c:3093)
==19291== by 0x911D7E: rest_of_handle_ira() (ira.c:4223)
==19291== by 0x97F20C: execute_one_pass(opt_pass*) (passes.c:2199)
==19291== by 0x97F5C4: execute_pass_list(opt_pass*) (passes.c:2254)
==19291== by 0x97F5D6: execute_pass_list(opt_pass*) (passes.c:2255)
==19291== by 0x7815F7: expand_function(cgraph_node*) (cgraphunit.c:1601)
==19291== by 0x783771: compile() (cgraphunit.c:1794)
==19291== by 0x783A94: finalize_compilation_unit() (cgraphunit.c:2080)
==19291== by 0x5B03DA: cp_write_global_declarations() (decl2.c:4024)
==19291== by 0xA1E444: compile_file() (toplev.c:560)
==19291== by 0xA20019: toplev_main(int, char**) (toplev.c:1863)
==19291== by 0x38E3421734: (below main) (libc-start.c:226)
==19291== Uninitialised value was created by a heap allocation
==19291== at 0x480871C: malloc (vg_replace_malloc.c:270)
==19291== by 0xF08587: xmalloc (xmalloc.c:147)
==19291== by 0xA0814F: sparseset_alloc(unsigned long) (sparseset.c:33)
==19291== by 0x92EC2F: ira_create_allocno_live_ranges() (ira-lives.c:1583)
==19291== by 0x9188C4: ira_build() (ira-build.c:3093)
==19291== by 0x911D7E: rest_of_handle_ira() (ira.c:4223)
==19291== by 0x97F20C: execute_one_pass(opt_pass*) (passes.c:2199)
==19291== by 0x97F5C4: execute_pass_list(opt_pass*) (passes.c:2254)
==19291== by 0x97F5D6: execute_pass_list(opt_pass*) (passes.c:2255)
==19291== by 0x7815F7: expand_function(cgraph_node*) (cgraphunit.c:1601)
==19291== by 0x783771: compile() (cgraphunit.c:1794)
==19291== by 0x783A94: finalize_compilation_unit() (cgraphunit.c:2080)
==19291== by 0x5B03DA: cp_write_global_declarations() (decl2.c:4024)
==19291== by 0xA1E444: compile_file() (toplev.c:560)
==19291== by 0xA20019: toplev_main(int, char**) (toplev.c:1863)
==19291== by 0x38E3421734: (below main) (libc-start.c:226)
==19291==
==19291== Conditional jump or move depends on uninitialised value(s)
==19291== at 0x92CFDA: make_object_born(ira_object*) (sparseset.h:147)
==19291== by 0x92D11A: mark_pseudo_regno_live(int) (ira-lives.c:295)
==19291== by 0x92E11C: process_bb_node_lives(ira_loop_tree_node*)
(ira-lives.c:1326)
==19291== by 0x9161FA: ira_traverse_loop_tree(bool, ira_loop_tree_node*,
void (*)(ira_loop_tree_node*), void (*)(ira_loop_tree_node*))
(ira-build.c:1495)
==19291== by 0x92ECA1: ira_create_allocno_live_ranges() (ira-lives.c:1591)
==19291== by 0x9188C4: ira_build() (ira-build.c:3093)
==19291== by 0x911D7E: rest_of_handle_ira() (ira.c:4223)
==19291== by 0x97F20C: execute_one_pass(opt_pass*) (passes.c:2199)
==19291== by 0x97F5C4: execute_pass_list(opt_pass*) (passes.c:2254)
==19291== by 0x97F5D6: execute_pass_list(opt_pass*) (passes.c:2255)
==19291== by 0x7815F7: expand_function(cgraph_node*) (cgraphunit.c:1601)
==19291== by 0x783771: compile() (cgraphunit.c:1794)
==19291== by 0x783A94: finalize_compilation_unit() (cgraphunit.c:2080)
==19291== by 0x5B03DA: cp_write_global_declarations() (decl2.c:4024)
==19291== by 0xA1E444: compile_file() (toplev.c:560)
==19291== by 0xA20019: toplev_main(int, char**) (toplev.c:1863)
==19291== by 0x38E3421734: (below main) (libc-start.c:226)
==19291== Uninitialised value was created by a heap allocation
==19291== at 0x480871C: malloc (vg_replace_malloc.c:270)
==19291== by 0xF08587: xmalloc (xmalloc.c:147)
==19291== by 0xA0814F: sparseset_alloc(unsigned long) (sparseset.c:33)
==19291== by 0x92EC2F: ira_create_allocno_live_ranges() (ira-lives.c:1583)
==19291== by 0x9188C4: ira_build() (ira-build.c:3093)
==19291== by 0x911D7E: rest_of_handle_ira() (ira.c:4223)
==19291== by 0x97F20C: execute_one_pass(opt_pass*) (passes.c:2199)
==19291== by 0x97F5C4: execute_pass_list(opt_pass*) (passes.c:2254)
==19291== by 0x97F5D6: execute_pass_list(opt_pass*) (passes.c:2255)
==19291== by 0x7815F7: expand_function(cgraph_node*) (cgraphunit.c:1601)
==19291== by 0x783771: compile() (cgraphunit.c:1794)
==19291== by 0x783A94: finalize_compilation_unit() (cgraphunit.c:2080)
==19291== by 0x5B03DA: cp_write_global_declarations() (decl2.c:4024)
==19291== by 0xA1E444: compile_file() (toplev.c:560)
==19291== by 0xA20019: toplev_main(int, char**) (toplev.c:1863)
==19291== by 0x38E3421734: (below main) (libc-start.c:226)
==19291==
==19291==
==19291== HEAP SUMMARY:
==19291== in use at exit: 352,134 bytes in 1,987 blocks
==19291== total heap usage: 3,683 allocs, 1,696 frees, 1,469,244 bytes
allocated
==19291==
==19291== LEAK SUMMARY:
==19291== definitely lost: 1,452 bytes in 73 blocks
==19291== indirectly lost: 0 bytes in 0 blocks
==19291== possibly lost: 16,064 bytes in 2 blocks
==19291== still reachable: 334,618 bytes in 1,912 blocks
==19291== suppressed: 0 bytes in 0 blocks
==19291== Rerun with --leak-check=full to see details of leaked memory
==19291==
==19291== For counts of detected and suppressed errors, rerun with: -v
==19291== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 2 from 2)
