http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51439
Bug #: 51439
Summary: [4.7 Regression] ICE(SIGFPE) in
good_cloning_opportunity_p
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: bur...@gcc.gnu.org
Host: x86_64-unknown-linux-gnu
Created attachment 26007
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26007
Reduced test case (t108.ii, 6.8 KiB)
The attached test case compiles with GCC 4.6 g++ -O3 and with today's GCC 4.7
up to -O2; with -O3 one gets an ICE:
$ g++-4.6 -c -O3 t108.ii
$ g++ -c t108.ii
$ g++ -c -O3 t108.ii
t108.ii:118:38: internal compiler error: Floating point exception
Program received signal SIGFPE, Arithmetic exception.
0x0000000000ef75f1 in good_cloning_opportunity_p (size_cost=0, count_sum=0,
freq_sum=1000, time_benefit=70, node=<optimized out>)
at gcc/ipa-cp.c:1233
1233 int evaluation = (time_benefit * freq_sum) / size_cost;
(gdb) bt
#0 0x0000000000ef75f1 in good_cloning_opportunity_p (size_cost=0, count_sum=0,
freq_sum=1000, time_benefit=70, node=<optimized out>)
at gcc/ipa-cp.c:1233
#1 good_cloning_opportunity_p (time_benefit=<optimized out>, freq_sum=1000,
count_sum=<optimized out>, size_cost=0, node=Unhandled dwarf expression opcode
0xfa
)
at gcc/ipa-cp.c:1205
#2 0x0000000000efce81 in decide_whether_version_node (node=0x2aaaacde8c60) at
gcc/ipa-cp.c:2258
#3 ipcp_decision_stage (topo=<optimized out>) atgcc/ipa-cp.c:2401
#4 ipcp_driver () at gcc/ipa-cp.c:2441
#5 0x00000000009aedf5 in execute_one_pass (pass=0x15bf200) at
gcc/passes.c:2074
#6 0x00000000009af5ba in execute_ipa_pass_list (pass=0x15bf200) at
gcc/passes.c:2441
#7 0x00000000007a8700 in ipa_passes () at gcc/cgraphunit.c:2075
