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[Bug rtl-optimization/78738] New: [7 Regression] ICE in extract_insn, at recog.c:2311
- From: "doko at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 08 Dec 2016 16:51:51 +0000
- Subject: [Bug rtl-optimization/78738] New: [7 Regression] ICE in extract_insn, at recog.c:2311
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78738
Bug ID: 78738
Summary: [7 Regression] ICE in extract_insn, at recog.c:2311
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: doko at gcc dot gnu.org
Target Milestone: ---
seen with r243219 on i686-linux-gnu, either omitting the -std=c99 or
-ffast-math works around it:
$ cat fractal_cache.i
double a;
long double roundl();
void b() {
int c = roundl(a);
b(c);
}
$ gcc -c -O2 -std=c99 -ffast-math fractal_cache.i
fractal_cache.i: In function 'b':
fractal_cache.i:6:1: error: unrecognizable insn:
}
^
(insn 10 9 11 2 (set (reg:DF 93)
(plus:DF (reg:DF 92)
(reg:DF 95))) "fractal_cache.i":4 -1
(nil))
fractal_cache.i:6:1: internal compiler error: in extract_insn, at recog.c:2311
0x85c48cf _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../src/gcc/rtl-error.c:108
0x85c490c _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
../../src/gcc/rtl-error.c:116
0x8596890 extract_insn(rtx_insn*)
../../src/gcc/recog.c:2311
0x83eb32d instantiate_virtual_regs_in_insn
../../src/gcc/function.c:1589
0x83eb32d instantiate_virtual_regs
../../src/gcc/function.c:1956
0x83eb32d execute
../../src/gcc/function.c:2005
Please submit a full bug report,
with preprocessed source if appropriate.