fixup: Improve tests

Author: igorkudrin

clang/test/CodeGen/AArch64/fixed-register-global.c

@@ -0,0 +1,22 @@
+/// Check that -ffixed register handled for globals.
+/// Regression test for #76426, #109778
+
+// RUN: %clang -c --target=aarch64-none-gnu -ffixed-x15 %s 2>&1 | count 0
+
+// RUN: not %clang -c --target=aarch64-none-gnu %s 2>&1 | \
+// RUN:   FileCheck %s --check-prefix=ERR_INVREG
+// ERR_INVREG: error: register 'x15' unsuitable for global register variables on this target
+
+// RUN: not %clang -c --target=aarch64-none-gnu -ffixed-x15 -DTYPE=short %s 2>&1 | \
+// RUN:   FileCheck %s --check-prefix=ERR_SIZE
+// ERR_SIZE: error: size of register 'x15' does not match variable size
+
+#ifndef TYPE
+#define TYPE long
+#endif
+
+register TYPE x15 __asm__("x15");
+
+TYPE foo() {
+  return x15;
+}

clang/test/Driver/aarch64-fixed-register-global.c

@@ -1,6 +1,9 @@
-// RUN: %clang_cc1 -triple aarch64-unknown-none-gnu %s -target-feature +reserve-x4 -target-feature +reserve-x15 -verify -fsyntax-only
+// RUN: %clang_cc1 -triple aarch64-unknown-none-gnu %s -target-feature +reserve-x4 -target-feature +reserve-x15 -verify -verify=no_x18 -fsyntax-only
+// RUN: %clang_cc1 -triple aarch64-unknown-android %s -target-feature +reserve-x4 -target-feature +reserve-x15 -verify -fsyntax-only
 
+register long x0 __asm__ ("x0");
 register char i1 __asm__ ("x15"); // expected-error {{size of register 'x15' does not match variable size}}
 register long long l2 __asm__ ("w14"); // expected-error {{size of register 'w14' does not match variable size}}
 register long x3 __asm__ ("x3"); // expected-error {{register 'x3' unsuitable for global register variables on this target}}
 register long x4 __asm__ ("x4");
+register long x18 __asm__ ("x18"); // no_x18-error {{register 'x18' unsuitable for global register variables on this target}}