https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77842
Bug ID: 77842
Summary: genmatch segfault on a missing brace
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Adding following (wrong pattern) to match.pd:
(simplify
(lt @0 @1)
(if (integer_zerop (@0))
{
/* causing segfault: } */
))
Causes segfault in:
Program received signal SIGSEGV, Segmentation fault.
_cpp_lex_direct (pfile=pfile@entry=0x689970) at ../../../libcpp/lex.c:2407
2407 if (buffer->need_line)
(gdb) bt
#0 _cpp_lex_direct (pfile=pfile@entry=0x689970) at ../../../libcpp/lex.c:2407
#1 0x000000000042af9a in _cpp_lex_token (pfile=pfile@entry=0x689970) at
../../../libcpp/lex.c:2291
#2 0x0000000000431778 in cpp_get_token_1 (pfile=0x689970,
location=location@entry=0x0) at ../../../libcpp/macro.c:2462
#3 0x0000000000431a47 in cpp_get_token (pfile=<optimized out>) at
../../../libcpp/macro.c:2604
#4 0x0000000000414de8 in parser::next (this=<optimized out>) at
../../gcc/genmatch.c:3769
#5 parser::parse_c_expr (this=this@entry=0x7fffffffdb30,
start=start@entry=CPP_OPEN_BRACE) at ../../gcc/genmatch.c:4119
#6 0x0000000000415561 in parser::parse_op (this=this@entry=0x7fffffffdb30) at
../../gcc/genmatch.c:4166
#7 0x0000000000415f25 in parser::parse_result (this=this@entry=0x7fffffffdb30,
result=result@entry=0x0, matcher=matcher@entry=0x0) at
../../gcc/genmatch.c:4265
#8 0x0000000000416db4 in parser::parse_simplify
(this=this@entry=0x7fffffffdb30, kind=kind@entry=simplify::SIMPLIFY,
simplifiers=..., matcher=matcher@entry=0x0, result=result@entry=0x0) at
../../gcc/genmatch.c:4415
#9 0x0000000000417003 in parser::parse_pattern
(this=this@entry=0x7fffffffdb30) at ../../gcc/genmatch.c:4649
#10 0x000000000041835d in parser::parser (this=0x7fffffffdb30, r_=<optimized
out>) at ../../gcc/genmatch.c:4735
#11 0x0000000000408a2f in main (argc=<optimized out>, argv=<optimized out>) at
../../gcc/genmatch.c:4833
I don't know whether it worth for fixing, but I'm adding the issue..
