https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97571
Bug ID: 97571
Summary: long parsing phase for simple array constructor
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: rimvydas.jas at gmail dot com
Target Milestone: ---
gcc version 11.0.0 20201025 (experimental) [master revision
d7ddd287c:9f8172cd7:47d13acbda9a5d8eb57ff169ba74857cd54108e4] (GCC)
x86_64-unknown-linux
$ cat init.f90
subroutine bpr_init
implicit none
integer :: i
real :: tacos2( 0:35250)
tacos2 = acos( (/ (i, i=64000,99250) /) / 100000.0)
end subroutine bpr_init
$ gfortran -O1 -Wall -Wextra -c init.f90 -ftime-report
init.f90:4:24:
4 | real :: tacos2( 0:35250)
| 1
Warning: Array 'tacos2' at (1) is larger than limit set by
'-fmax-stack-var-size=', moved from stack to static storage. This makes the
procedure unsafe when called recursively, or concurrently from multiple
threads. Consider using '-frecursive', or increase the '-fmax-stack-var-size='
limit, or change the code to use an ALLOCATABLE array. [-Wsurprising]
Time variable usr sys wall
GGC
phase parsing :1923.03 (100%) 0.21 (100%)1923.67 (100%)
7500k ( 97%)
phase opt and generate : 0.01 ( 0%) 0.00 ( 0%) 0.02 ( 0%)
69k ( 1%)
callgraph functions expansion : 0.01 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
48k ( 1%)
parser (global) :1923.02 (100%) 0.21 (100%)1923.67 (100%)
7500k ( 97%)
tree gimplify : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
1752 ( 0%)
tree STMT verifier : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 ( 0%)
varconst : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
0 ( 0%)
initialize rtl : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
12k ( 0%)
TOTAL :1923.04 0.21 1923.69
7756k
Extra diagnostic checks enabled; compiler may run slowly.
Configure with --enable-checking=release to disable checks.
Configuring with checking=release or different -O levels have no impact on time
taken, previous gfortran 10.2 did not exhibit such long parsing times.
