Add `intrinsics.prefetch_*` procedures

core/hash/xxhash/common.odin

@@ -47,22 +47,19 @@ Error :: enum {
 
 XXH_DISABLE_PREFETCH :: #config(XXH_DISABLE_PREFETCH, false)
 
-/*
-	llvm.prefetch fails code generation on Linux.
-*/
-when !XXH_DISABLE_PREFETCH && ODIN_OS == "windows" {
-	import "core:sys/llvm"
-
+when !XXH_DISABLE_PREFETCH {
 	prefetch_address :: #force_inline proc(address: rawptr) {
-		llvm.prefetch(address, .Read, .High, .Data)
+		intrinsics.prefetch_read_data(address, /*high*/3)
 	}
-	prefetch_offset  :: #force_inline proc(address: rawptr, auto_cast offset: uintptr) {
+	prefetch_offset  :: #force_inline proc(address: rawptr, #any_int offset: uintptr) {
 		ptr := rawptr(uintptr(address) + offset)
 		prefetch_address(ptr)
 	}
 } else {
-	prefetch_address :: #force_inline proc(address: rawptr) {}
-	prefetch_offset  :: #force_inline proc(address: rawptr, auto_cast offset: uintptr) {}
+	prefetch_address :: #force_inline proc(address: rawptr) {
+	}
+	prefetch_offset  :: #force_inline proc(address: rawptr, #any_int offset: uintptr) {
+	}
 }
 prefetch :: proc { prefetch_address, prefetch_offset, }
 

core/intrinsics/intrinsics.odin

@@ -46,6 +46,11 @@ fixed_point_div     :: proc(lhs, rhs: $T, #const scale: uint) -> T where type_is
 fixed_point_mul_sat :: proc(lhs, rhs: $T, #const scale: uint) -> T where type_is_integer(T) ---
 fixed_point_div_sat :: proc(lhs, rhs: $T, #const scale: uint) -> T where type_is_integer(T) ---
 
+prefetch_read_instruction  :: proc(address: rawptr, #const locality: i32 /* 0..=3 */) ---
+prefetch_read_data         :: proc(address: rawptr, #const locality: i32 /* 0..=3 */) ---
+prefetch_write_instruction :: proc(address: rawptr, #const locality: i32 /* 0..=3 */) ---
+prefetch_write_data        :: proc(address: rawptr, #const locality: i32 /* 0..=3 */) ---
+
 // Compiler Hints
 expect :: proc(val, expected_val: T) -> T ---
 

src/check_builtin.cpp

@@ -2642,7 +2642,41 @@ bool check_builtin_procedure(CheckerContext *c, Operand *operand, Ast *call, i32
 			operand->type = x.type;
 		}
 		break;
-
+		
+	case BuiltinProc_prefetch_read_instruction:
+	case BuiltinProc_prefetch_read_data:
+	case BuiltinProc_prefetch_write_instruction:
+	case BuiltinProc_prefetch_write_data:
+		{
+			operand->mode = Addressing_NoValue;
+			operand->type = nullptr;
+			
+			Operand x = {};
+			Operand y = {};
+			check_expr(c, &x, ce->args[0]);
+			check_expr(c, &y, ce->args[1]);
+			if (x.mode == Addressing_Invalid) {
+				return false;
+			}
+			if (y.mode == Addressing_Invalid) {
+				return false;
+			}
+			check_assignment(c, &x, t_rawptr, builtin_name);
+			if (x.mode == Addressing_Invalid) {
+				return false;
+			}
+			if (y.mode != Addressing_Constant && is_type_integer(y.type)) {
+				error(y.expr, "Second argument to '%.*s' representing the locality must be an integer in the range 0..=3", LIT(builtin_name));
+				return false;
+			}
+			i64 locality = exact_value_to_i64(y.value);
+			if (!(0 <= locality && locality <= 3)) {
+				error(y.expr, "Second argument to '%.*s' representing the locality must be an integer in the range 0..=3", LIT(builtin_name));
+				return false;
+			}
+			
+		}
+		break;
 		
 	case BuiltinProc_syscall:
 		{

src/checker_builtin_procs.hpp

@@ -69,6 +69,11 @@ enum BuiltinProcId {
 
 	BuiltinProc_volatile_store,
 	BuiltinProc_volatile_load,
+	
+	BuiltinProc_prefetch_read_instruction,
+	BuiltinProc_prefetch_read_data,
+	BuiltinProc_prefetch_write_instruction,
+	BuiltinProc_prefetch_write_data,
 
 	BuiltinProc_atomic_fence,
 	BuiltinProc_atomic_fence_acq,
@@ -305,6 +310,11 @@ gb_global BuiltinProc builtin_procs[BuiltinProc_COUNT] = {
 
 	{STR_LIT("volatile_store"),  2, false, Expr_Stmt, BuiltinProcPkg_intrinsics},
 	{STR_LIT("volatile_load"),   1, false, Expr_Expr, BuiltinProcPkg_intrinsics},
+	
+	{STR_LIT("prefetch_read_instruction"),  2, false, Expr_Stmt, BuiltinProcPkg_intrinsics},
+	{STR_LIT("prefetch_read_data"),         2, false, Expr_Stmt, BuiltinProcPkg_intrinsics},
+	{STR_LIT("prefetch_write_instruction"), 2, false, Expr_Stmt, BuiltinProcPkg_intrinsics},
+	{STR_LIT("prefetch_write_data"),        2, false, Expr_Stmt, BuiltinProcPkg_intrinsics},
 
 	{STR_LIT("atomic_fence"),        0, false, Expr_Stmt, BuiltinProcPkg_intrinsics},
 	{STR_LIT("atomic_fence_acq"),    0, false, Expr_Stmt, BuiltinProcPkg_intrinsics},

src/llvm_backend_proc.cpp

@@ -1831,6 +1831,54 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv,
 			return lb_emit_conv(p, res, t);
 		}
 		
+	case BuiltinProc_prefetch_read_instruction:
+	case BuiltinProc_prefetch_read_data:
+	case BuiltinProc_prefetch_write_instruction:
+	case BuiltinProc_prefetch_write_data:
+		{
+			lbValue ptr = lb_emit_conv(p, lb_build_expr(p, ce->args[0]), t_rawptr);
+			unsigned long long locality = cast(unsigned long long)exact_value_to_i64(ce->args[1]->tav.value);
+			unsigned long long rw = 0;
+			unsigned long long cache = 0;
+			switch (id) {
+			case BuiltinProc_prefetch_read_instruction:
+				rw = 0;
+				cache = 0;
+				break;
+			case BuiltinProc_prefetch_read_data:
+				rw = 0;
+				cache = 1;
+				break;
+			case BuiltinProc_prefetch_write_instruction:
+				rw = 1;
+				cache = 0;
+				break;
+			case BuiltinProc_prefetch_write_data:
+				rw = 1;
+				cache = 1;
+				break;
+			}
+			
+			char const *name = "llvm.prefetch";
+			
+			LLVMTypeRef types[1] = {lb_type(p->module, t_rawptr)};
+			unsigned id = LLVMLookupIntrinsicID(name, gb_strlen(name));
+			GB_ASSERT_MSG(id != 0, "Unable to find %s.%s", name, LLVMPrintTypeToString(types[0]));
+			LLVMValueRef ip = LLVMGetIntrinsicDeclaration(p->module->mod, id, types, gb_count_of(types));
+			
+			LLVMTypeRef llvm_i32 = lb_type(p->module, t_i32);
+			LLVMValueRef args[4] = {};
+			args[0] = ptr.value;
+			args[1] = LLVMConstInt(llvm_i32, rw, false);
+			args[2] = LLVMConstInt(llvm_i32, locality, false);
+			args[3] = LLVMConstInt(llvm_i32, cache, false);
+			
+			lbValue res = {};
+			res.value = LLVMBuildCall(p->builder, ip, args, gb_count_of(args), "");
+			res.type = nullptr;
+			return res;
+		}
+		
 	case BuiltinProc_syscall:
 		{
 			unsigned arg_count = cast(unsigned)ce->args.count;