[clang-repl][NFC] Split weak symbol test to a new test

[junaire]

Summary

Windows has some issues when we try to use __attribute__((weak)) in
JIT, so we disabled that. But it's not worth to disable the whole test
just for this single feature. This patch split that part from the
original test so we can keep testing stuff that normally working in
Windows.

Signed-off-by: Jun Zhang <[e-mail]>

[junaire]

Correct copy paster error

[junaire]

extern printf so we can use, another copy paster mistake...

[v.g.vassilev]

LGTM!

clang/test/Interpreter/execute-weak.cpp

 // RUN: clang-repl "int x = 10;" "int y=7; err;" "int y = 10;"
 // RUN: clang-repl "int i = 10;" 'extern "C" int printf(const char*,...);' \
 // RUN:            'auto r1 = printf("i = %d\n", i);' | FileCheck --check-prefix=CHECK-DRIVER %s
 // REQUIRES: host-supports-jit
 // UNSUPPORTED: system-aix
 // XFAIL: system-windows
 // CHECK-DRIVER: i = 10
 // RUN: cat %s | clang-repl | FileCheck %s
 extern "C" int printf(const char *, ...);
-int i = 42;
-auto r1 = printf("i = %d\n", i);
-// CHECK: i = 42
-
-struct S { float f = 1.0; S *m = nullptr;} s;
-
-auto r2 = printf("S[f=%f, m=0x%llx]\n", s.f, reinterpret_cast<unsigned long long>(s.m));
-// CHECK-NEXT: S[f=1.000000, m=0x0]
-
-inline int foo() { return 42; }
-int r3 = foo();
-
-int __attribute__((weak)) bar() { return 1; }
+int __attribute__((weak)) bar() { return 42; }
 auto r4 = printf("bar() = %d\n", bar());
-// CHECK-NEXT: bar() = 1
+// CHECK: bar() = 42
 
 %quit

clang/test/Interpreter/execute.cpp

 // RUN: clang-repl "int x = 10;" "int y=7; err;" "int y = 10;"
 // RUN: clang-repl "int i = 10;" 'extern "C" int printf(const char*,...);' \
 // RUN:            'auto r1 = printf("i = %d\n", i);' | FileCheck --check-prefix=CHECK-DRIVER %s
 // REQUIRES: host-supports-jit
 // UNSUPPORTED: system-aix
-// XFAIL: system-windows
 // CHECK-DRIVER: i = 10
 // RUN: cat %s | clang-repl | FileCheck %s
 extern "C" int printf(const char *, ...);
 int i = 42;
 auto r1 = printf("i = %d\n", i);
 // CHECK: i = 42
 
 struct S { float f = 1.0; S *m = nullptr;} s;
 
 auto r2 = printf("S[f=%f, m=0x%llx]\n", s.f, reinterpret_cast<unsigned long long>(s.m));
 // CHECK-NEXT: S[f=1.000000, m=0x0]
 
 inline int foo() { return 42; }
 int r3 = foo();
 
-int __attribute__((weak)) bar() { return 1; }
-auto r4 = printf("bar() = %d\n", bar());
-// CHECK-NEXT: bar() = 1
-
 %quit