https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86087
Bug ID: 86087
Summary: ICE in rtl_verify_fallthru, at cfgrtl.c:2911 (error:
verify_flow_info: Incorrect fallthru 8->9; error:
wrong insn in the fallthru edge)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-*-linux-gnu*
gcc-9.0.0-alpha20180603 snapshot (r261132) ICEs when compiling the following
snippet w/ -O3 (-Ofast) -floop-parallelize-all -frename-registers
-freorder-blocks-and-partition -ftrapv -ftree-parallelize-loops=2
-fno-expensive-optimizations -fno-tree-coalesce-vars -fno-tree-dce
-fno-tree-loop-im:
long long int
bp (int *tp, int o3, int lv)
{
int cs = 0;
long long int nn = lv;
while (tp[0] + lv + nn != 0)
nn = tp[0] + 1;
while (cs < o3)
{
nn |= (tp[cs] + 1) / (!!tp[0] + 1);
++cs;
}
return nn;
}
% powerpc-e300c3-linux-gnu-gcc-9.0.0-alpha20180603 -O3 -floop-parallelize-all
-frename-registers -freorder-blocks-and-partition -ftrapv
-ftree-parallelize-loops=2 -fno-expensive-optimizations -fno-tree-coalesce-vars
-fno-tree-dce -fno-tree-loop-im -c l1fi3pyz.c
l1fi3pyz.c: In function 'bp':
l1fi3pyz.c:17:1: error: verify_flow_info: Incorrect fallthru 8->9
}
^
l1fi3pyz.c:17:1: error: wrong insn in the fallthru edge
(barrier 549 513 362)
during RTL pass: bbro
l1fi3pyz.c:17:1: internal compiler error: in rtl_verify_fallthru, at
cfgrtl.c:2911
0x556c7c _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/rtl-error.c:108
0x751063 rtl_verify_fallthru
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/cfgrtl.c:2911
0x751063 rtl_verify_flow_info
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/cfgrtl.c:3012
0x73061b verify_flow_info()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/cfghooks.c:263
0x74e581 checking_verify_flow_info
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/cfghooks.h:198
0x74e581 cfg_layout_finalize()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/cfgrtl.c:4333
0x1376de1 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20180603/work/gcc-9-20180603/gcc/bb-reorder.c:2646
