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Add intrinsics.{ptr_offset, ptr_sub}

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gingerBill
2021-05-30 13:21:56 +01:00
parent 4b46d691f8
commit 0f91ffe28f
3 changed files with 138 additions and 0 deletions
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31
src/llvm_backend.cpp
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@@ -9580,6 +9580,37 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv,
return {};
}
case BuiltinProc_ptr_offset:
{
lbValue ptr = lb_build_expr(p, ce->args[0]);
lbValue len = lb_build_expr(p, ce->args[1]);
len = lb_emit_conv(p, len, t_int);
LLVMValueRef indices[1] = {
len.value,
};
lbValue res = {};
res.type = tv.type;
res.value = LLVMBuildGEP(p->builder, ptr.value, indices, gb_count_of(indices), "");
return res;
}
case BuiltinProc_ptr_sub:
{
lbValue ptr0 = lb_build_expr(p, ce->args[0]);
lbValue ptr1 = lb_build_expr(p, ce->args[1]);
LLVMTypeRef type_int = lb_type(p->module, t_int);
LLVMValueRef diff = LLVMBuildPtrDiff(p->builder, ptr0.value, ptr1.value, "");
diff = LLVMBuildIntCast2(p->builder, diff, type_int, /*signed*/true, "");
lbValue res = {};
res.type = t_int;
res.value = diff;
return res;
}
case BuiltinProc_atomic_fence:
LLVMBuildFence(p->builder, LLVMAtomicOrderingSequentiallyConsistent, false, "");