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Fix ptrCast of array references to fn

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Closes #3607
This commit is contained in:
LemonBoy 2019-11-06 22:49:24 +01:00 committed by Andrew Kelley
parent c7fd414dab
commit 528908a06e
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GPG Key ID: 7C5F548F728501A9
2 changed files with 10 additions and 8 deletions
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12
src/codegen.cpp
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@ -7050,16 +7050,12 @@ check: switch (const_val->special) {
case ZigTypeIdEnum:
return bigint_to_llvm_const(get_llvm_type(g, type_entry), &const_val->data.x_enum_tag);
case ZigTypeIdFn:
if (const_val->data.x_ptr.special == ConstPtrSpecialFunction) {
assert(const_val->data.x_ptr.mut == ConstPtrMutComptimeConst);
return fn_llvm_value(g, const_val->data.x_ptr.data.fn.fn_entry);
} else if (const_val->data.x_ptr.special == ConstPtrSpecialHardCodedAddr) {
LLVMTypeRef usize_type_ref = g->builtin_types.entry_usize->llvm_type;
uint64_t addr = const_val->data.x_ptr.data.hard_coded_addr.addr;
return LLVMConstIntToPtr(LLVMConstInt(usize_type_ref, addr, false), get_llvm_type(g, type_entry));
} else {
if (const_val->data.x_ptr.special == ConstPtrSpecialFunction &&
const_val->data.x_ptr.mut != ConstPtrMutComptimeConst) {
zig_unreachable();
}
// Treat it the same as we do for pointers
return gen_const_val_ptr(g, const_val, name);
case ZigTypeIdPointer:
return gen_const_val_ptr(g, const_val, name);
case ZigTypeIdErrorUnion:

6
test/stage1/behavior/cast.zig
View File

@ -559,3 +559,9 @@ test "peer cast *[0]T to []const T" {
var y = if (b) &[0]u8{} else buf;
expect(mem.eql(u8, "abcde", y));
}
var global_array: [4]u8 = undefined;
test "cast from array reference to fn" {
const f = @ptrCast(extern fn () void, &global_array);
expect(@ptrToInt(f) == @ptrToInt(&global_array));
}