Merge branch 'master' into freestanding_amd64

1 files changed, 17 insertions, 8 deletions

diff --git a/src/llvm_backend_proc.cpp b/src/llvm_backend_proc.cpp
index 053ee2fb2..27a6ec209 100644
--- a/src/llvm_backend_proc.cpp
+++ b/src/llvm_backend_proc.cpp
@@ -1046,7 +1046,7 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv,
 			return lb_string_len(p, v);
 		} else if (is_type_array(t)) {
 			GB_PANIC("Array lengths are constant");
-		} else if (is_type_slice(t)) {
+		} else if (is_type_slice(t) || is_type_relative_slice(t)) {
 			return lb_slice_len(p, v);
 		} else if (is_type_dynamic_array(t)) {
 			return lb_dynamic_array_len(p, v);
@@ -1072,7 +1072,7 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv,
 			GB_PANIC("Unreachable");
 		} else if (is_type_array(t)) {
 			GB_PANIC("Array lengths are constant");
-		} else if (is_type_slice(t)) {
+		} else if (is_type_slice(t) || is_type_relative_slice(t)) {
 			return lb_slice_len(p, v);
 		} else if (is_type_dynamic_array(t)) {
 			return lb_dynamic_array_cap(p, v);
@@ -1406,14 +1406,23 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv,
 
 	case BuiltinProc_read_cycle_counter:
 		{
-			char const *name = "llvm.readcyclecounter";
-			unsigned id = LLVMLookupIntrinsicID(name, gb_strlen(name));
-			GB_ASSERT_MSG(id != 0, "Unable to find %s", name);
-			LLVMValueRef ip = LLVMGetIntrinsicDeclaration(p->module->mod, id, nullptr, 0);
-
 			lbValue res = {};
-			res.value = LLVMBuildCall(p->builder, ip, nullptr, 0, "");
 			res.type = tv.type;
+
+			if (build_context.metrics.arch == TargetArch_arm64) {
+				LLVMTypeRef func_type = LLVMFunctionType(LLVMInt64TypeInContext(p->module->ctx), nullptr, 0, false);
+				bool has_side_effects = false;
+				LLVMValueRef the_asm = llvm_get_inline_asm(func_type, str_lit("mrs x9, cntvct_el0"), str_lit("=r"), has_side_effects);
+				GB_ASSERT(the_asm != nullptr);
+				res.value = LLVMBuildCall2(p->builder, func_type, the_asm, nullptr, 0, "");
+			} else {
+				char const *name = "llvm.readcyclecounter";
+				unsigned id = LLVMLookupIntrinsicID(name, gb_strlen(name));
+				GB_ASSERT_MSG(id != 0, "Unable to find %s", name);
+				LLVMValueRef ip = LLVMGetIntrinsicDeclaration(p->module->mod, id, nullptr, 0);
+
+				res.value = LLVMBuildCall(p->builder, ip, nullptr, 0, "");
+			}
 			return res;
 		}