#!/bin/bash
#
# Run like:
#  multidelta -level=# ./reduce-ice $FILE
#  levels: 0 0 1 1 2 2 10 10
#

FILE=rtld.i
CC=s390x-ibm-linux-gnu-gcc
CFLAGS="-std=gnu99 -fpic -O1"
STRING="unrecognizable insn"

$CC -pipe -c $CFLAGS $FILE 2>&1 | grep "$STRING"

#rtld.c: In function '_dl_start':
#rtld.c:562: error: unrecognizable insn:
#(insn 53 52 54 5 (set (reg:DI 103)
#        (const:DI (plus:DI (symbol_ref:DI ("_rtld_local") [flags 0x2] <var_decl 0x20000672580 _rtld_local>)
#                (const_int -14595029256 [0xfffffffc9a1186f8])))) -1 (nil)
#    (nil))
#rtld.c:562: internal compiler error: in extract_insn, at recog.c:2084