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-rw-r--r--src/llvm_abi.cpp137
1 files changed, 100 insertions, 37 deletions
diff --git a/src/llvm_abi.cpp b/src/llvm_abi.cpp
index 0b2bb7956..af08722c3 100644
--- a/src/llvm_abi.cpp
+++ b/src/llvm_abi.cpp
@@ -256,8 +256,10 @@ gb_internal i64 lb_sizeof(LLVMTypeRef type) {
}
break;
+#if LLVM_VERSION_MAJOR < 20
case LLVMX86_MMXTypeKind:
return 8;
+#endif
case LLVMVectorTypeKind:
{
LLVMTypeRef elem = OdinLLVMGetVectorElementType(type);
@@ -310,8 +312,10 @@ gb_internal i64 lb_alignof(LLVMTypeRef type) {
case LLVMArrayTypeKind:
return lb_alignof(OdinLLVMGetArrayElementType(type));
+#if LLVM_VERSION_MAJOR < 20
case LLVMX86_MMXTypeKind:
return 8;
+#endif
case LLVMVectorTypeKind:
{
// TODO(bill): This appears to be correct but LLVM isn't necessarily "great" with regards to documentation
@@ -569,7 +573,9 @@ namespace lbAbiAmd64SysV {
gb_internal void classify_with(LLVMTypeRef t, Array<RegClass> *cls, i64 ix, i64 off);
gb_internal void fixup(LLVMTypeRef t, Array<RegClass> *cls);
- gb_internal lbArgType amd64_type(LLVMContextRef c, LLVMTypeRef type, Amd64TypeAttributeKind attribute_kind, ProcCallingConvention calling_convention);
+ gb_internal lbArgType amd64_type(LLVMContextRef c, LLVMTypeRef type, Amd64TypeAttributeKind attribute_kind, ProcCallingConvention calling_convention,
+ bool is_arg,
+ i32 *int_regs, i32 *sse_regs);
gb_internal Array<RegClass> classify(LLVMTypeRef t);
gb_internal LLVMTypeRef llreg(LLVMContextRef c, Array<RegClass> const &reg_classes, LLVMTypeRef type);
@@ -579,7 +585,9 @@ namespace lbAbiAmd64SysV {
}
LB_ABI_MODIFY_RETURN_IF_TUPLE_MACRO();
- return amd64_type(c, return_type, Amd64TypeAttribute_StructRect, ft->calling_convention);
+ return amd64_type(c, return_type, Amd64TypeAttribute_StructRect, ft->calling_convention,
+ false,
+ nullptr, nullptr);
}
gb_internal LB_ABI_INFO(abi_info) {
@@ -588,10 +596,16 @@ namespace lbAbiAmd64SysV {
ft->ctx = c;
ft->calling_convention = calling_convention;
+ i32 int_regs = 6; // rdi, rsi, rdx, rcx, r8, r9
+ i32 sse_regs = 8; // xmm0-xmm7
+
ft->args = array_make<lbArgType>(lb_function_type_args_allocator(), arg_count);
for (unsigned i = 0; i < arg_count; i++) {
- ft->args[i] = amd64_type(c, arg_types[i], Amd64TypeAttribute_ByVal, calling_convention);
+ ft->args[i] = amd64_type(c, arg_types[i], Amd64TypeAttribute_ByVal, calling_convention,
+ true,
+ &int_regs, &sse_regs);
}
+
ft->ret = compute_return_type(ft, c, return_type, return_is_defined, return_is_tuple);
return ft;
@@ -650,17 +664,79 @@ namespace lbAbiAmd64SysV {
}
- gb_internal lbArgType amd64_type(LLVMContextRef c, LLVMTypeRef type, Amd64TypeAttributeKind attribute_kind, ProcCallingConvention calling_convention) {
+
+ gb_internal bool is_aggregate(LLVMTypeRef type) {
+ LLVMTypeKind kind = LLVMGetTypeKind(type);
+ switch (kind) {
+ case LLVMStructTypeKind:
+ if (LLVMCountStructElementTypes(type) == 1) {
+ return is_aggregate(LLVMStructGetTypeAtIndex(type, 0));
+ }
+ return true;
+ case LLVMArrayTypeKind:
+ if (LLVMGetArrayLength(type) == 1) {
+ return is_aggregate(LLVMGetElementType(type));
+ }
+ return true;
+ }
+ return false;
+ };
+
+ gb_internal lbArgType amd64_type(LLVMContextRef c, LLVMTypeRef type, Amd64TypeAttributeKind attribute_kind, ProcCallingConvention calling_convention,
+ bool is_arg,
+ i32 *int_regs, i32 *sse_regs) {
+ auto cls = classify(type);
+ i32 needed_int = 0;
+ i32 needed_sse = 0;
+ for (auto c : cls) {
+ switch (c) {
+ case RegClass_Int:
+ needed_int += 1;
+ break;
+ case RegClass_SSEFs:
+ case RegClass_SSEFv:
+ case RegClass_SSEDs:
+ case RegClass_SSEDv:
+ case RegClass_SSEInt8:
+ case RegClass_SSEInt16:
+ case RegClass_SSEInt32:
+ case RegClass_SSEInt64:
+ case RegClass_SSEInt128:
+ case RegClass_SSEUp:
+ needed_sse += 1;
+ break;
+ }
+ }
+
+ bool ran_out_of_regs = false;
+ if (int_regs && sse_regs) {
+ *int_regs -= needed_int;
+ *sse_regs -= needed_sse;
+ bool int_ok = *int_regs >= 0;
+ bool sse_ok = *sse_regs >= 0;
+
+ *int_regs = gb_max(*int_regs, 0);
+ *sse_regs = gb_max(*sse_regs, 0);
+
+ if ((!int_ok || !sse_ok) && is_aggregate(type)) {
+ ran_out_of_regs = true;
+ }
+ }
+
if (is_register(type)) {
LLVMAttributeRef attribute = nullptr;
if (type == LLVMInt1TypeInContext(c)) {
attribute = lb_create_enum_attribute(c, "zeroext");
}
return lb_arg_type_direct(type, nullptr, nullptr, attribute);
- }
-
- auto cls = classify(type);
- if (is_mem_cls(cls, attribute_kind)) {
+ } else if (ran_out_of_regs) {
+ if (is_arg) {
+ return lb_arg_type_indirect_byval(c, type);
+ } else {
+ LLVMAttributeRef attribute = lb_create_enum_attribute_with_type(c, "sret", type);
+ return lb_arg_type_indirect(type, attribute);
+ }
+ } else if (is_mem_cls(cls, attribute_kind)) {
LLVMAttributeRef attribute = nullptr;
if (attribute_kind == Amd64TypeAttribute_ByVal) {
if (is_calling_convention_odin(calling_convention)) {
@@ -901,7 +977,7 @@ namespace lbAbiAmd64SysV {
return types[0];
}
- return LLVMStructTypeInContext(c, types.data, cast(unsigned)types.count, sz == 0);
+ return LLVMStructTypeInContext(c, types.data, cast(unsigned)types.count, false);
}
gb_internal void classify_with(LLVMTypeRef t, Array<RegClass> *cls, i64 ix, i64 off) {
@@ -1155,38 +1231,24 @@ namespace lbAbiArm64 {
}
} else {
i64 size = lb_sizeof(return_type);
- if (size <= 16) {
- LLVMTypeRef cast_type = nullptr;
-
- if (size == 0) {
- cast_type = LLVMStructTypeInContext(c, nullptr, 0, false);
- } else if (size <= 8) {
- cast_type = LLVMIntTypeInContext(c, cast(unsigned)(size*8));
- } else {
- unsigned count = cast(unsigned)((size+7)/8);
-
- LLVMTypeRef llvm_i64 = LLVMIntTypeInContext(c, 64);
- LLVMTypeRef *types = gb_alloc_array(temporary_allocator(), LLVMTypeRef, count);
-
- i64 size_copy = size;
- for (unsigned i = 0; i < count; i++) {
- if (size_copy >= 8) {
- types[i] = llvm_i64;
- } else {
- types[i] = LLVMIntTypeInContext(c, 8*cast(unsigned)size_copy);
- }
- size_copy -= 8;
- }
- GB_ASSERT(size_copy <= 0);
- cast_type = LLVMStructTypeInContext(c, types, count, true);
- }
- return lb_arg_type_direct(return_type, cast_type, nullptr, nullptr);
- } else {
+ if (size > 16) {
LB_ABI_MODIFY_RETURN_IF_TUPLE_MACRO();
LLVMAttributeRef attr = lb_create_enum_attribute_with_type(c, "sret", return_type);
return lb_arg_type_indirect(return_type, attr);
}
+
+ GB_ASSERT(size <= 16);
+ LLVMTypeRef cast_type = nullptr;
+ if (size == 0) {
+ cast_type = LLVMStructTypeInContext(c, nullptr, 0, false);
+ } else if (size <= 8) {
+ cast_type = LLVMIntTypeInContext(c, cast(unsigned)(size*8));
+ } else {
+ LLVMTypeRef llvm_i64 = LLVMIntTypeInContext(c, 64);
+ cast_type = llvm_array_type(llvm_i64, 2);
+ }
+ return lb_arg_type_direct(return_type, cast_type, nullptr, nullptr);
}
}
@@ -1814,7 +1876,8 @@ gb_internal LB_ABI_INFO(lb_get_abi_info) {
return_type, return_is_defined,
ALLOW_SPLIT_MULTI_RETURNS && return_is_tuple && is_calling_convention_odin(calling_convention),
calling_convention,
- base_type(original_type));
+ base_type(original_type)
+ );
// NOTE(bill): this is handled here rather than when developing the type in `lb_type_internal_for_procedures_raw`
generated by cgit v1.2.3 (git 2.39.1) at 2026-02-15 11:06:53 +0000