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when resolving slice types, might need to...

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...resolve alignment if custom alignment is provided

fixes #2689
This commit is contained in:
Andrew Kelley 2019-06-18 11:31:05 -04:00
parent 8ed88280a6
commit 9050a07540
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GPG Key ID: 7C5F548F728501A9
2 changed files with 14 additions and 1 deletions
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4
src/ir.cpp
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@ -16794,7 +16794,9 @@ static IrInstruction *ir_analyze_instruction_slice_type(IrAnalyze *ira,
case ZigTypeIdPromise:
case ZigTypeIdVector:
{
if ((err = type_resolve(ira->codegen, child_type, ResolveStatusZeroBitsKnown)))
ResolveStatus needed_status = (align_bytes == 0) ?
ResolveStatusZeroBitsKnown : ResolveStatusAlignmentKnown;
if ((err = type_resolve(ira->codegen, child_type, needed_status)))
return ira->codegen->invalid_instruction;
ZigType *slice_ptr_type = get_pointer_to_type_extra(ira->codegen, child_type,
is_const, is_volatile, PtrLenUnknown, align_bytes, 0, 0, is_allow_zero);

11
test/stage1/behavior/slice.zig
View File

@ -54,3 +54,14 @@ test "comptime slices are disambiguated" {
expect(sliceSum([_]u8{ 1, 2 }) == 3);
expect(sliceSum([_]u8{ 3, 4 }) == 7);
}
test "slice type with custom alignment" {
const LazilyResolvedType = struct {
anything: i32,
};
var slice: []align(32) LazilyResolvedType = undefined;
var array: [10]LazilyResolvedType align(32) = undefined;
slice = &array;
slice[1].anything = 42;
expect(array[1].anything == 42);
}