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Merge pull request #7139 from bingis-khan/fix_nil_type_mismatch

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Fix LLVM codegen for matching on `nil` for `union{}`
This commit is contained in:
gingerBill
2026-08-03 16:06:55 +02:00
committed by GitHub
parent 39e5d78aba c1e327c566
commit dd796f5574
1 changed files with 3 additions and 1 deletions
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4
src/llvm_backend_stmt.cpp
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@@ -2201,7 +2201,9 @@ gb_internal void lb_build_type_switch_stmt(lbProcedure *p, AstTypeSwitchStmt *ss
LLVMValueRef switch_instr = nullptr;
if (type_size_of(parent_base_type) == 0) {
GB_ASSERT(tag.value == nullptr);
switch_instr = LLVMBuildSwitch(p->builder, lb_const_bool(p->module, t_llvm_bool, false).value, else_block->block, cast(unsigned)num_cases);
GB_ASSERT(switch_kind == TypeSwitch_Union); // zero size only possible for union{}
Type *ut = type_deref(parent.type);
switch_instr = LLVMBuildSwitch(p->builder, lb_const_int(m, union_tag_type(ut), 0).value, else_block->block, cast(unsigned)num_cases);
} else {
GB_ASSERT(tag.value != nullptr);
switch_instr = LLVMBuildSwitch(p->builder, tag.value, else_block->block, cast(unsigned)num_cases);