mold/test/elf/icf.sh

#!/bin/bash
export LC_ALL=C
set -e
CC="${TEST_CC:-cc}"
CXX="${TEST_CXX:-c++}"
GCC="${TEST_GCC:-gcc}"
GXX="${TEST_GXX:-g++}"
MACHINE="${MACHINE:-$(uname -m)}"
testname=$(basename "$0" .sh)
echo -n "Testing $testname ... "
t=out/test/elf/$MACHINE/$testname
mkdir -p $t

cat <<EOF | $CC -c -o $t/a.o -ffunction-sections -fdata-sections -xc -
#include <stdio.h>

int bar() {
  return 5;
}

int foo1(int x) {
  return bar() + x;
}

int foo2(int x) {
  return bar() + x;
}

int foo3() {
  bar();
  return 5;
}

int main() {
  printf("%d %d\n", (long)foo1 == (long)foo2, (long)foo1 == (long)foo3);
  return 0;
}
EOF

$CC -B. -o $t/exe $t/a.o -Wl,-icf=all
$QEMU $t/exe | grep -q '1 0'

echo OK