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Add intrinsics.mem_copy and intrinsics.mem_copy_non_overlapping

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gingerBill
2021-05-19 10:50:02 +01:00
parent e0225c3579
commit e82e4398b6
4 changed files with 101 additions and 20 deletions
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src/llvm_backend.cpp
+38
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@@ -9451,6 +9451,44 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv,
return res;
}
case BuiltinProc_mem_copy:
case BuiltinProc_mem_copy_non_overlapping:
{
lbValue dst = lb_build_expr(p, ce->args[0]);
lbValue src = lb_build_expr(p, ce->args[1]);
lbValue len = lb_build_expr(p, ce->args[2]);
dst = lb_emit_conv(p, dst, t_rawptr);
src = lb_emit_conv(p, src, t_rawptr);
len = lb_emit_conv(p, len, t_int);
char const *name = nullptr;
switch (id) {
case BuiltinProc_mem_copy: name = "llvm.memmove"; break;
case BuiltinProc_mem_copy_non_overlapping: name = "llvm.memcpy"; break;
}
LLVMTypeRef types[3] = {
lb_type(p->module, t_rawptr),
lb_type(p->module, t_rawptr),
lb_type(p->module, t_int)
};
unsigned id = LLVMLookupIntrinsicID(name, gb_strlen(name));
GB_ASSERT_MSG(id != 0, "Unable to find %s.%s.%s.%s", name, LLVMPrintTypeToString(types[0]), LLVMPrintTypeToString(types[1]), LLVMPrintTypeToString(types[2]));
LLVMValueRef ip = LLVMGetIntrinsicDeclaration(p->module->mod, id, types, gb_count_of(types));
LLVMValueRef args[4] = {};
args[0] = dst.value;
args[1] = src.value;
args[2] = len.value;
args[3] = LLVMConstInt(LLVMInt1TypeInContext(p->module->ctx), 0, false); // is_volatile parameter
LLVMBuildCall(p->builder, ip, args, gb_count_of(args), "");
return {};
}
case BuiltinProc_atomic_fence:
LLVMBuildFence(p->builder, LLVMAtomicOrderingSequentiallyConsistent, false, "");