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LLVM backend: fix union with only 1 tag tripping llvm assertion

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Andrew Kelley 2022-02-10 22:28:53 -07:00 committed by Jakub Konka
parent 1a8987fe7c
commit 335c680cde
1 changed files with 3 additions and 1 deletions
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4
src/codegen/llvm.zig
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@ -835,6 +835,7 @@ pub const DeclGen = struct {
var buffer: Type.Payload.Bits = undefined;
const int_ty = t.intTagType(&buffer);
const bit_count = int_ty.intInfo(target).bits;
assert(bit_count != 0);
return dg.context.intType(bit_count);
},
.Float => switch (t.floatBits(target)) {
@ -1077,10 +1078,10 @@ pub const DeclGen = struct {
const union_obj = t.cast(Type.Payload.Union).?.data;
if (t.unionTagType()) |enum_tag_ty| {
const enum_tag_llvm_ty = try dg.llvmType(enum_tag_ty);
const layout = union_obj.getLayout(target, true);
if (layout.payload_size == 0) {
const enum_tag_llvm_ty = try dg.llvmType(enum_tag_ty);
gop.value_ptr.* = enum_tag_llvm_ty;
return enum_tag_llvm_ty;
}
@ -1111,6 +1112,7 @@ pub const DeclGen = struct {
llvm_union_ty.structSetBody(&llvm_fields, llvm_fields.len, .False);
return llvm_union_ty;
}
const enum_tag_llvm_ty = try dg.llvmType(enum_tag_ty);
// Put the tag before or after the payload depending on which one's
// alignment is greater.