// #target: macos-x64
module test;
import std::io;

faultdef BAD_STUFF, WORSE_STUFF, THE_WORST_STUFF;

fn int exitcode(fault error)
{
    switch (error)
    {
        case BAD_STUFF: return 64;
        case WORSE_STUFF: return 65;
        case THE_WORST_STUFF: return 66;
        default: return 70;
    }
}

fn void? canFail()
{
    if (34 + 35 == 69)
    {
        return BAD_STUFF~;
    }
}

fn int main(String[] args)
{
    if (catch err = canFail())
    {
        return exitcode(err);
    }

	return 0;
}

/* #expect: test.ll


define i32 @test.exitcode(i64 %0) #0 {
entry:
  %switch = alloca i64, align 8
  store i64 %0, ptr %switch, align 8
  br label %switch.entry

switch.entry:                                     ; preds = %entry
  %1 = load i64, ptr %switch, align 8
  %eq = icmp eq i64 ptrtoint (ptr @test.BAD_STUFF to i64), %1
  br i1 %eq, label %switch.case, label %next_if

switch.case:                                      ; preds = %switch.entry
  ret i32 64

next_if:                                          ; preds = %switch.entry
  %eq1 = icmp eq i64 ptrtoint (ptr @test.WORSE_STUFF to i64), %1
  br i1 %eq1, label %switch.case2, label %next_if3

switch.case2:                                     ; preds = %next_if
  ret i32 65

next_if3:                                         ; preds = %next_if
  %eq4 = icmp eq i64 ptrtoint (ptr @test.THE_WORST_STUFF to i64), %1
  br i1 %eq4, label %switch.case5, label %next_if6

switch.case5:                                     ; preds = %next_if3
  ret i32 66

next_if6:                                         ; preds = %next_if3
  br label %switch.default

switch.default:                                   ; preds = %next_if6
  ret i32 70
}

define i64 @test.canFail() #0 {
entry:
  br label %if.then

if.then:                                          ; preds = %entry
  ret i64 ptrtoint (ptr @test.BAD_STUFF to i64)
}

define i32 @test.main(ptr %0, i64 %1) #0 {
entry:
  %args = alloca %"char[][]", align 8
  %err = alloca i64, align 8
  store ptr %0, ptr %args, align 8
  %ptradd = getelementptr inbounds i8, ptr %args, i64 8
  store i64 %1, ptr %ptradd, align 8
  br label %testblock

testblock:                                        ; preds = %entry
  %2 = call i64 @test.canFail()
  %not_err = icmp eq i64 %2, 0
  %3 = call i1 @llvm.expect.i1(i1 %not_err, i1 true)
  br i1 %3, label %after_check, label %assign_optional

assign_optional:                                  ; preds = %testblock
  store i64 %2, ptr %err, align 8
  br label %end_block

after_check:                                      ; preds = %testblock
  store i64 0, ptr %err, align 8
  br label %end_block

end_block:                                        ; preds = %after_check, %assign_optional
  %4 = load i64, ptr %err, align 8
  %i2b = icmp ne i64 %4, 0
  br i1 %i2b, label %if.then, label %if.exit

if.then:                                          ; preds = %end_block
  %5 = load i64, ptr %err, align 8
  %6 = call i32 @test.exitcode(i64 %5)
  ret i32 %6

if.exit:                                          ; preds = %end_block
  ret i32 0
}