cgen: fix ./v vlib/v/slow_tests/assembly/asm_test.arm64.v failure on macos with an M1 processor (fix regression after #26083) (#26446)

Author: spytheman

.github/workflows/linux_ci.yml

@@ -50,6 +50,8 @@ jobs:
         run: v run ci/linux_ci.vsh verify_v_test_works_tcc
       - name: Test pure V math module
         run: v run ci/linux_ci.vsh test_pure_v_math_module_tcc
+      - name: Test inline assembly on linux
+        run: v run ci/linux_ci.vsh test_inline_assembly
       - name: Self tests
         run: v run ci/linux_ci.vsh self_tests_tcc
       - name: Build examples

.github/workflows/macos_ci.yml

@@ -45,6 +45,8 @@ jobs:
         run: v run ci/macos_ci.vsh build_v_with_prealloc
       - name: Test cross compilation to Linux
         run: v run ci/macos_ci.vsh test_cross_compilation
+      - name: Test inline assembly on macos
+        run: v run ci/macos_ci.vsh test_inline_assembly
       - name: Build V with -cstrict
         run: v run ci/macos_ci.vsh build_with_cstrict
       - name: All code is formatted

ci/linux_ci.vsh

@@ -411,6 +411,10 @@ fn native_cross_compilation_to_macos() {
 	exec('rm -f hw.macos')
 }
 
+fn test_inline_assembly() {
+	exec('v test vlib/v/slow_tests/assembly')
+}
+
 // Collect all tasks
 const all_tasks = {
 	'build_v_with_prealloc':                             Task{build_v_with_prealloc, 'Build V with prealloc'}
@@ -476,6 +480,7 @@ const all_tasks = {
 	'native_machine_code_generation_clang':              Task{native_machine_code_generation_clang, 'native machine code generation (clang)'}
 	'native_machine_code_generation_gcc':                Task{native_machine_code_generation_gcc, 'native machine code generation (gcc)'}
 	'native_cross_compilation_to_macos':                 Task{native_cross_compilation_to_macos, 'native cross compilation to macos'}
+	'test_inline_assembly':                              Task{test_inline_assembly, 'Test inline assembly'}
 }
 
 common.run(all_tasks)

ci/macos_ci.vsh

@@ -124,6 +124,10 @@ fn test_readline() {
 	exec('v -silent test examples/readline/')
 }
 
+fn test_inline_assembly() {
+	exec('v test vlib/v/slow_tests/assembly')
+}
+
 const all_tasks = {
 	'test_symlink':                       Task{test_symlink, 'Test symlink'}
 	'test_cross_compilation':             Task{test_cross_compilation, 'Test cross compilation to Linux'}
@@ -146,6 +150,7 @@ const all_tasks = {
 	'v_self_compilation_parallel_cc':     Task{v_self_compilation_parallel_cc, 'V self compilation with -parallel-cc'}
 	'test_password_input':                Task{test_password_input, 'Test password input'}
 	'test_readline':                      Task{test_readline, 'Test readline'}
+	'test_inline_assembly':               Task{test_inline_assembly, 'Test inline assembly'}
 }
 
 common.run(all_tasks)

vlib/v/gen/c/cgen.v

@@ -3481,17 +3481,15 @@ fn (mut g Gen) asm_arg(arg ast.AsmArg, stmt ast.AsmStmt) {
 				.base {
 					if stmt.arch == .arm64 {
 						g.write('[')
-					}
-					if stmt.arch == .loongarch64 {
+					} else if stmt.arch == .loongarch64 {
 						g.write('')
 					} else {
 						g.write('(')
 					}
 					g.asm_arg(base, stmt)
 					if stmt.arch == .arm64 {
 						g.write(']')
-					}
-					if stmt.arch == .loongarch64 {
+					} else if stmt.arch == .loongarch64 {
 						g.write('')
 					} else {
 						g.write(')')

vlib/v/slow_tests/assembly/asm_empty_statement_test.v

@@ -1,3 +1,4 @@
+// vtest build: !msvc
 fn test_empty_asm_statements() {
 	asm amd64 {
 	}