#! /bin/bash

if [[ $1 == "--help" ]]; then
        echo "Usage: compile-test <source>"
        echo "Utility for small evm backend test cases. Takes a C source file, compiles it to llvm IR, and runs the backend."
        echo "All data, including the source file, llvm IR, output, and logs are moved to a directory of the same name for ease of organization."
        echo "IMPORTANT: a symlink to the correct llc must be present in the current directory. Please make one, or this will fail silently."
        exit 0
fi

if [[ $# -ne 1 ]]; then
        echo "incorrect number of arguments" >&2; exit 1
fi

IR_OUT="$1.ll"
EVM_OUT="$1.out"
TEST_DIR="test-$1"

echo "test directory: $TEST_DIR"

mkdir ./$TEST_DIR

clang --version
./llc --version

# Generate IR
clang -S -emit-llvm $1 -o $TEST_DIR/$IR_OUT

if [[ $? -ne 0 ]]; then
        echo "clang failed; exiting" >&2
        rm -rf $TEST_DIR; exit 1
fi

echo "wrote clang output to $TEST_DIR/$IR_OUT"
echo "calling evm backend..."

./llc -mtriple=evm -debug $TEST_DIR/$IR_OUT -o $TEST_DIR/$EVM_OUT 2>$TEST_DIR/log.txt

if [[ $? -ne 0 ]]; then
        echo "backend failed. refer to $TEST_DIR/backendlog.txt if present."; exit 1
fi

mv $1 $TEST_DIR/$1

echo "backend succeeded; moved source to test dir"
exit 0