compiler: intrinsify runtime/internal/atomic functions
Currently runtime/internal/atomic functions are implemented in C
using C compiler intrinsics. This CL lets the Go frontend
recognize these functions and turn them into intrinsics directly.
Corresponding change to the GCC backend:
Index: gcc/go/go-gcc.cc
===================================================================
--- gcc/go/go-gcc.cc (revision 271105)
+++ gcc/go/go-gcc.cc (working copy)
@@ -776,6 +776,109 @@
this->define_builtin(BUILT_IN_UNREACHABLE, "__builtin_unreachable", NULL,
build_function_type(void_type_node, void_list_node),
true, true);
+
+ // We provide some atomic functions.
+ t = build_function_type_list(uint32_type_node,
+ ptr_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_LOAD_4, "__atomic_load_4", NULL,
+ t, false, false);
+
+ t = build_function_type_list(uint64_type_node,
+ ptr_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_LOAD_8, "__atomic_load_8", NULL,
+ t, false, false);
+
+ t = build_function_type_list(void_type_node,
+ ptr_type_node,
+ uint32_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_STORE_4, "__atomic_store_4", NULL,
+ t, false, false);
+
+ t = build_function_type_list(void_type_node,
+ ptr_type_node,
+ uint64_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_STORE_8, "__atomic_store_8", NULL,
+ t, false, false);
+
+ t = build_function_type_list(uint32_type_node,
+ ptr_type_node,
+ uint32_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_EXCHANGE_4, "__atomic_exchange_4", NULL,
+ t, false, false);
+
+ t = build_function_type_list(uint64_type_node,
+ ptr_type_node,
+ uint64_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_EXCHANGE_8, "__atomic_exchange_8", NULL,
+ t, false, false);
+
+ t = build_function_type_list(boolean_type_node,
+ ptr_type_node,
+ ptr_type_node,
+ uint32_type_node,
+ boolean_type_node,
+ integer_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_COMPARE_EXCHANGE_4,
+ "__atomic_compare_exchange_4", NULL,
+ t, false, false);
+
+ t = build_function_type_list(boolean_type_node,
+ ptr_type_node,
+ ptr_type_node,
+ uint64_type_node,
+ boolean_type_node,
+ integer_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_COMPARE_EXCHANGE_8,
+ "__atomic_compare_exchange_8", NULL,
+ t, false, false);
+
+ t = build_function_type_list(uint32_type_node,
+ ptr_type_node,
+ uint32_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_ADD_FETCH_4, "__atomic_add_fetch_4", NULL,
+ t, false, false);
+
+ t = build_function_type_list(uint64_type_node,
+ ptr_type_node,
+ uint64_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_ADD_FETCH_8, "__atomic_add_fetch_8", NULL,
+ t, false, false);
+
+ t = build_function_type_list(unsigned_char_type_node,
+ ptr_type_node,
+ unsigned_char_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_AND_FETCH_1, "__atomic_and_fetch_1", NULL,
+ t, false, false);
+
+ t = build_function_type_list(unsigned_char_type_node,
+ ptr_type_node,
+ unsigned_char_type_node,
+ integer_type_node,
+ NULL_TREE);
+ this->define_builtin(BUILT_IN_ATOMIC_OR_FETCH_1, "__atomic_or_fetch_1", NULL,
+ t, false, false);
}
// Get an unnamed integer type.
Change-Id: Ibdc77bac3a9f7890d468fe5e244ed4d452741df8
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/176918
Reviewed-by: Ian Lance Taylor <iant@golang.org>
3 files changed
