https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84677
Bug ID: 84677
Summary: internal compiler error: in extract_constrain_insn, at
recog.c:2205
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: inline-asm
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at gmail dot com
Target Milestone: ---
Input:
void a() {
double b;
asm ("" : "+pz, y" (b));
}
Output:
$ xgcc -x c++ -S -
<stdin>: In function 'void a()':
<stdin>:4:1: error: unrecognizable insn:
(insn 7 11 5 2 (parallel [
(set (reg:DF 0 ax [orig:87 b ] [87])
(asm_operands:DF ("") ("=pz, y") 0 [
(reg:DF 0 ax [orig:87 b ] [87])
]
[
(asm_input:DF ("0,0") <stdin>:3)
]
[] <stdin>:3))
(clobber (reg:CCFP 18 fpsr))
(clobber (reg:CC 17 flags))
]) "<stdin>":3 -1
(nil))
during RTL pass: reload
<stdin>:4:1: internal compiler error: in extract_constrain_insn, at
recog.c:2205
0x610903 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/vegard/git/gcc/gcc/rtl-error.c:108
0x610991 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/vegard/git/gcc/gcc/rtl-error.c:116
0x2d17a96 extract_constrain_insn(rtx_insn*)
/home/vegard/git/gcc/gcc/recog.c:2205
0x282f53f check_rtl
/home/vegard/git/gcc/gcc/lra.c:2155
0x282f53f lra(_IO_FILE*)
/home/vegard/git/gcc/gcc/lra.c:2573
0x260b334 do_reload
/home/vegard/git/gcc/gcc/ira.c:5465
0x260b334 execute
/home/vegard/git/gcc/gcc/ira.c:5649
$ xgcc --version
xgcc (GCC) 8.0.1 20180301 (experimental)
Built from git c435a9e730c6e8f10da09d58b4fc9aaeb401b0d5 (r258097).
7.3.0 seems fine with this.
Test case was minimised by C-Reduce.
