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[Bug tree-optimization/70152] New: gcc ICE at -O3 and above on valid code on x86_64-linux-gnu in "replace_uses_by"
- From: "helloqirun at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 09 Mar 2016 03:59:46 +0000
- Subject: [Bug tree-optimization/70152] New: gcc ICE at -O3 and above on valid code on x86_64-linux-gnu in "replace_uses_by"
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70152
Bug ID: 70152
Summary: gcc ICE at -O3 and above on valid code on
x86_64-linux-gnu in "replace_uses_by"
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: helloqirun at gmail dot com
Target Milestone: ---
The following valid code causes an ICE when compiled with the current gcc trunk
at -O3 and above on x86_64-linux-gnu in both 32-bit and 64-bit modes.
It should be a 6 regression.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 6.0.0 20160308 (experimental) [trunk revision 234065] (GCC)
$ gcc-trunk -O3 abc.c
abc.c: In function 'zfgetline.isra.0':
abc.c:17:1: internal compiler error: in replace_uses_by, at tree-cfg.c:1825
}
^
0xb96859 replace_uses_by(tree_node*, tree_node*)
../../gcc/gcc/tree-cfg.c:1825
0xc3a82e replace_removed_params_ssa_names
../../gcc/gcc/tree-sra.c:4771
0xc3cdce ipa_sra_modify_function_body(vec<ipa_parm_adjustment, va_heap,
vl_ptr>)
../../gcc/gcc/tree-sra.c:4854
0xc3d5d1 modify_function
../../gcc/gcc/tree-sra.c:5173
0xc477b6 ipa_early_sra
../../gcc/gcc/tree-sra.c:5403
0xc477b6 execute
../../gcc/gcc/tree-sra.c:5450
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$ cat abc.c
int a;
int fgetc ();
void _setjmp ();
static int zfgetline (int p1)
{
p1 = 0;
_setjmp ();
for (;;)
switch (p1)
case 5:
p1 = fgetc ();
}
void zftp_login ()
{
zfgetline (a);
}