https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89664
Bug ID: 89664
Summary: [8/9 Regression] ICE in free_bb, at
tree-ssa-math-opts.c:522
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Started with gcc-8 in combination with option -Ofast :
$ cat z1.f90
subroutine s (x)
real :: x
call sub (x)
end
subroutine sub (x)
real :: x, y
logical :: a, b
integer :: f1, f2, f3, f4
y = f1()
a = .false.
if ( f2() > f3() ) a = .true.
b = .false.
if ( f2() > f4() ) b = .true.
if ( a ) then
x = 1.0
else if ( b ) then
x = 1.0/y**2
else
x = 1.0/y - y**2
end if
end
$ gcc-7 -c z1.f90 -Ofast
$ gcc-9-20190310 -c z1.f90 -O3
$
$ gcc-9-20190310 -c z1.f90 -Ofast
during GIMPLE pass: recip
z1.f90:1:0:
1 | subroutine s (x)
|
internal compiler error: Segmentation fault
0xb369df crash_signal
../../gcc/toplev.c:326
0xc638b9 free_bb
../../gcc/tree-ssa-math-opts.c:522
0xc66597 execute_cse_reciprocals_1
../../gcc/tree-ssa-math-opts.c:846
0xc69e99 execute
../../gcc/tree-ssa-math-opts.c:956
