Re-enable VFE/WME tests, skip LTO-using tests under ASan (#39912)

Author: kubamracek

test/IRGen/conditional-dead-strip-exec.swift

@@ -15,6 +15,11 @@
 // FIXME(mracek): More work needed to get this to work on non-Apple platforms.
 // REQUIRES: VENDOR=apple
 
+// For LTO, the linker dlopen()'s the libLTO library, which is a scenario that
+// ASan cannot work in ("Interceptors are not working, AddressSanitizer is
+// loaded too late").
+// REQUIRES: no_asan
+
 // (1) used
 @inline(never) func func1_used() { print("func1_used") }
 

test/IRGen/virtual-function-elimination-exec.swift

@@ -14,8 +14,10 @@
 // FIXME(mracek): More work needed to get this to work on non-Apple platforms.
 // REQUIRES: VENDOR=apple
 
-// Disable to unblock CI
-// REQUIRES: rdar84643923
+// For LTO, the linker dlopen()'s the libLTO library, which is a scenario that
+// ASan cannot work in ("Interceptors are not working, AddressSanitizer is
+// loaded too late").
+// REQUIRES: no_asan
 
 class MyClass {
   func foo() { print("MyClass.foo") }

test/IRGen/virtual-function-elimination-two-modules.swift

@@ -34,6 +34,11 @@
 // FIXME(mracek): More work needed to get this to work on non-Apple platforms.
 // REQUIRES: VENDOR=apple
 
+// For LTO, the linker dlopen()'s the libLTO library, which is a scenario that
+// ASan cannot work in ("Interceptors are not working, AddressSanitizer is
+// loaded too late").
+// REQUIRES: no_asan
+
 #if LIBRARY
 
 public class MyClass {

test/IRGen/witness-method-elimination-exec.swift

@@ -14,8 +14,10 @@
 // FIXME(mracek): More work needed to get this to work on non-Apple platforms.
 // REQUIRES: VENDOR=apple
 
-// Disable to unblock CI
-// REQUIRES: rdar84643923
+// For LTO, the linker dlopen()'s the libLTO library, which is a scenario that
+// ASan cannot work in ("Interceptors are not working, AddressSanitizer is
+// loaded too late").
+// REQUIRES: no_asan
 
 protocol TheProtocol {
   func func1_live()

test/IRGen/witness-method-elimination-two-modules.swift

@@ -35,8 +35,10 @@
 // FIXME(mracek): More work needed to get this to work on non-Apple platforms.
 // REQUIRES: VENDOR=apple
 
-// Disable to unblock CI
-// REQUIRES: rdar84643923
+// For LTO, the linker dlopen()'s the libLTO library, which is a scenario that
+// ASan cannot work in ("Interceptors are not working, AddressSanitizer is
+// loaded too late").
+// REQUIRES: no_asan
 
 #if LIBRARY